Yii Framework 2 Change Log
==========================

2.0.0-rc under development
--------------------------

- Bug #1263: Fixed the issue that Gii and Debug modules might be affected by incompatible asset manager configuration (qiangxue)
- Bug #2314: Gii model generator does not generate correct relation type in some special case (qiangxue)
- Bug #2563: Theming is not working if the path map of the theme contains ".." or "." in the paths (qiangxue)
- Bug #2801: Fixed the issue that GridView gets footer content before data cells content (ElisDN)
- Bug #2821: Console help command incorrectly lists non-console controllers as available commands (qiangxue)
- Bug #2853: ActiveRecord did not handle resource-typed columns well (chris68, qiangxue)
- Bug #3042: `yii\widgets\Pjax` should end application right after it finishes responding to a pjax request (qiangxue)
- Bug #3066: `yii\db\mssql\Schema::getTableSchema()` should return null when the table does not exist (qiangxue)
- Bug #3091: Fixed inconsistent treatment of `Widget::run()` when a widget is used as a container and as a self-contained object (qiangxue)
- Bug #3118: Ensure client validation has the same behavior as server side validation for number validator (cebe)
- Bug #3121: `yii\base\Application::bootstrap` may fail to load some components if they are specified as class names (qiangxue)
- Bug #3125: `yii\console\controllers\AssetController` now respects data URL resources (klimov-paul)
- Bug #3128: Fixed the bug that `defaultRoles` set in RBAC manager was not working as specified (qiangxue)
- Bug #3153: Fixed the bug that using "between" operator to build a SQL query will cause a PHP notice (gonimar)
- Bug #3184: Fixed the bug that client validation for string length comparison did not set error message correctly (Sergeygithub)
- Bug #3194: Date formatter works only for timestamps in the year range 1970 to 2038 (kartik-v)
- Bug #3204: `yii\di\Container` did not handle the `$config` parameter well in case when it does not have a default value (qiangxue)
- Bug #3216: Fixed the bug that `yii.activeForm.destroy()` did not remove `submit` event handlers (qiangxue)
- Bug #3233: Ensure consistent behavior in ActiveRecord::afterSave() (cebe, qiangxue)
- Bug #3236: Return value for DateTime->format('U') casted to double to allow correct date formatting (pgaultier)
- Bug #3268: Fixed the bug that the schema name in a table name was not respected by `yii\db\mysql\Schema` (terazoid, qiangxue)
- Bug #3311: Fixed the bug that `yii\di\Container::has()` did not return correct value (mgrechanik, qiangxue)
- Bug #3327: Fixed "Unable to find debug data" when logging objects with circular references (jarekkozak, samdark)
- Bug #3368: Fix for comparing numeric attributes in JavaScript (technixp)
- Bug #3393: Fix `yii\helpers\FileHelper::copyDirectory()` pattern not working (klimov-paul)
- Bug #3431: Allow using extended ErrorHandler class from the app namespace (cebe)
- Bug #3436: Fixed the issue that `ServiceLocator` still returns the old component after calling `set()` with a new definition (qiangxue)
- Bug #3458: Fixed the bug that the image rendered by `CaptchaAction` was using a wrong content type (MDMunir, qiangxue)
- Bug #3473: Allow postgreSQL to specify timestamp precision via abstract types in QueryBuilder (cebe)
- Bug #3478: Fixed yii\console\Controller::select accept empty input as '0' value (lynicidn)
- Bug #3522: Fixed BaseFileHelper::normalizePath to allow a (.) for the current path. (skotos)
- Bug #3548: Fixed the bug that X-Rate-Limit-Remaining header is always zero when using RateLimiter (qiangxue)
- Bug #3559: Use native support for batchInsert in SQLite versions >= 3.7.11 and avoid limitations of the fallback (cebe)
- Bug #3564: Fixed the bug that primary key columns should not take default values from schema (qiangxue)
- Bug #3567: Fixed the bug that smallint was treated as string for PostgreSQL (qiangxue)
- Bug #3568: When the primary query sets `asArray`, it is not respected by the `via` relational query (qiangxue)
- Bug #3578: Fixed postgreSQL column type detection, added missing types (MDMunir, cebe)
- Bug #3583: Added typecast to auto value of primary key on insert of sql active record (cebe)
- Bug #3591: Fixed incomplete obsolete filling in i18n `MessageController::saveMessagesToDb()` (advsm)
- Bug #3601: Fixed the bug that the refresh URL was not generated correctly by `Captcha` (qiangxue, klevron)
- Bug #3638: `yii\filters\HttpCache` does not work as expected when session is started before the filter (qiangxue)
- Bug #3681: Fixed problem with AR::findOne() when a default scope joins another table so that PK name becomes ambigous (cebe)
- Bug #3715: Fixed the bug that using a custom pager/sorter with `GridView` may generate two different pagers/sorters if the layout configures two pagers/sorters (qiangxue)
- Bug #3716: `DynamicModel::validateData()` does not call `validate()` if the `$rules` parameter is empty (qiangxue)
- Bug #3751: Fixed postgreSQL schema data for enum values, do not add values if there are none (makroxyz)
- Bug #3752: `QueryBuilder::batchInsert()` does not typecast input values (qiangxue)
- Bug #3756: Fix number formatting error for `\yii\base\Formatter` by converting strings to float (kartik-v)
- Bug #3772: Behaviors adding validation rules do not work as expected (qiangxue)
- Bug #3817: `yii\rbac\PhpManager::getChildren()` returns null instead of expected empty array (qiangxue)
- Bug #3843: Fixed Menu bug when using `template` with `encodeLabel` => false (creocoder, umneeq)
- Bug #3863: Fixed incorrect js selector for `\yii\widgets\ActiveForm::errorSummaryCssClass` when it contains multiple classes (creocoder, umneeq)
- Bug #3893: Headers did not overwrite default setting by webserver (cebe)
- Bug #3909: `Html::to()` should not prefix base URL to URLs that already contain scheme (qiangxue)
- Bug #3920: Fixed issue with loading default values of PostgreSQL boolean columns (cebe)
- Bug #3934: yii.handleAction() in yii.js does not correctly detect if a hyperlink contains useful URL or not (joni-jones, qiangxue)
- Bug #3968: Messages logged in shutdown functions are not handled (qiangxue)
- Bug #3989: Fixed yii\log\FileTarget::$rotateByCopy to avoid any rename (cebe)
- Bug #3996: Traversing `Yii::$app->session` may cause a PHP error (qiangxue)
- Bug #4020: OCI column detection did not work so gii and other things failed (Sanya1991)
- Bug #4105: Html::dropDownlist options encodeSpaces was not applied to subgroups (MDMunir)
- Bug #4123: Trace level in logger had no effect in Targets, traces where not logged (cebe)
- Bug #4127: `CaptchaValidator` clientside error message wasn't formed properly (samdark)
- Bug #4162: Fixed bug where schema name was not used in ’SHOW CREATE TABLE’ query in `yii\db\mysql\Schema` (stevekr)
- Bug #4241: `yii\widgets\Pjax` was incorrectly setting container id (mitalcoi)
- Bug #4276: Added check for UPLOAD_ERR_NO_FILE in `yii\web\UploadedFile` and return null if no file was uploaded (OmgDef)
- Bug #4342: mssql (dblib) driver does not support getting attributes (tof06)
- Bug #4371: Active form client validation wasn't working in case of two models having same named fields (abrahamy)
- Bug #4409: Upper case letters in subdirectory prefixes of controller IDs were not properly handled (qiangxue)
- Bug #4412: Formatter used SI Prefixes for base 1024, now uses binary prefixes (kmindi)
- Bug #4427: Formatter could do one division too much (kmindi)
- Bug #4453: `yii message/extract` wasn't properly writing to po files in case of multiple categories (samdark)
- Bug #4469: Make `Security::compareString()` timing depend only on length of `$actual` input and add unit test. (tom--)
- Bug #4470: Avoid endless loop when exporting logs with low values of flushInterval and eportInterval (cebe)
- Bug #4497: Fixed StringHelper::byteSubstr() returning empty string on null $length param (mbman)
- Bug #4514: Fixed Request class crashing when empty CSRF token value is sent in cookie (cebe)
- Bug #4519: `yii\base\Model::isAttributeRequired()` should check if the `when` option of the validator is set (thiagotalma)
- Bug #4592: Fixed `yii help` command was listing incorrect action names for methods like `actionSayNO` (samdark)
- Bug #4654: Fixed issue with PostgreSQL and inserting boolean values with batch insert (cebe)
- Bug #4672: Fixed issue with PostgreSQL handling of boolean values in queries, dropped support for using boolean value for integer columns (cebe)
- Bug #4727: Fixed wrong Stylus definition in `\yii\web\AssetConverter` (samdark)
- Bug #4813: Fixed MSSQL schema that was getting incorrect info about constraints (samdark, SerjRamone, o-rey)
- Bug #4880: Return value of yii\web\Request::getPrefferedLanguage() was a normalized value instead of a valid language value from the input array (cebe)
- Bug: Fixed inconsistent return of `\yii\console\Application::runAction()` (samdark)
- Bug: URL encoding for the route parameter added to `\yii\web\UrlManager` (klimov-paul)
- Bug: Fixed the bug that requesting protected or private action methods would cause 500 error instead of 404 (qiangxue)
- Bug: Fixed Object of class Imagick could not be converted to string in CaptchaAction (eXprojects, cebe)
- Bug: Fixed wrong behavior of `StringHelper::byteSubstr()` in some edge cases (cebe)
- Enh #87: Helper `yii\helpers\Security` converted into application component, cryptographic strength improved (klimov-paul)
- Enh #422: Added Support for BIT(M) data type default values in Schema (cebe)
- Enh #1160: Added $strict parameter to Inflector::camel2id() to handle consecutive uppercase chars (schmunk)
- Enh #1249: Added support for Active Record relation via array attributes (klimov-paul, cebe)
- Enh #1388: Added mapping from physical types to abstract types for OCI DB driver (qiangxue)
- Enh #1452: Added `Module::getInstance()` to allow accessing the module instance from anywhere within the module (qiangxue)
- Enh #2264: `CookieCollection::has()` will return false for expired or removed cookies (qiangxue)
- Enh #2315: Any operator now could be used with `yii\db\Query::->where()` operand format (samdark)
- Enh #2435: `yii\db\IntegrityException` is now thrown on database integrity errors instead of general `yii\db\Exception` (samdark)
- Enh #2558: Enhanced support for memcached by adding `yii\caching\MemCache::persistentId` and `yii\caching\MemCache::options` (qiangxue)
- Enh #2837: Error page now shows arguments in stack trace method calls (samdark)
- Enh #2906: Added support for using conditional comments for js and css files registered through asset bundles and Html helper (exromany, qiangxue)
- Enh #2942: Added truncate and truncateWord methods (Alex-Code, samdark)
- Enh #3008: Added `Html::errorSummary()` (qiangxue)
- Enh #3088: The debug and gii modules will manage their own URL rules now (hiltonjanfield, qiangxue)
- Enh #3101: Improved handling of log target failures. It will now skip target and log reason instead of going into infinite cycle (samdark)
- Enh #3103: debugger panel is now not displayed when printing a page (githubjeka)
- Enh #3108: Added `yii\debug\Module::enableDebugLogs` to disable logging debug logs by default (qiangxue)
- Enh #3132: `yii\rbac\PhpManager` now supports more compact data file format (qiangxue)
- Enh #3154: Added validation error display for `GridView` filters (ivan-kolmychek)
- Enh #3196: Masked input upgraded to use jquery.inputmask plugin with more features. (kartik-v)
- Enh #3220: Added support for setting transaction isolation levels (cebe)
- Enh #3221: Added events for DB transaction commit/rollback (drcypher, qiangxue)
- Enh #3222: Added `useTablePrefix` option to the model generator for Gii (horizons2)
- Enh #3230: Added `yii\filters\AccessControl::user` to support access control with different actors (qiangxue)
- Enh #3232: Added `export()` and `exportAsString()` methods to `yii\helpers\BaseVarDumper` (klimov-paul)
- Enh #3244: Allow logging complex data such as arrays and object via the log system (cebe)
- Enh #3252: Added support for case insensitive matching using ILIKE to PostgreSQL QueryBuilder (cebe)
- Enh #3280: Support dynamically attaching anonymous behaviors (qiangxue)
- Enh #3283: Added `$checkAjax` to `yii\web\User::loginRequired()` (qiangxue)
- Enh #3284: Added support for checking multiple ETags by `yii\filters\HttpCache` (qiangxue)
- Enh #3298: Supported configuring `View::theme` using a class name (netyum, qiangxue)
- Enh #3328: `BaseMailer` generates better text body from html body (armab)
- Enh #3380: Allow `value` in `defaultValueValidator` to be a closure (Alex-Code)
- Enh #3384: Added callback-style transactions (leandrogehlen, Ragazzo, samdark)
- Enh #3399, #3241: Added support for MS SQL Server older than 2012 (fourteenmeister, samdark)
- Enh #3459: Added logging of errors, which may occur at `yii\caching\FileCache::gc()` (klimov-paul)
- Enh #3472: Added configurable option to encode spaces in dropDownLists and listBoxes (kartik-v)
- Enh #3518: `yii\helpers\Html::encode()` now replaces invalid code sequences with "�" (DaSourcerer)
- Enh #3520: Added `unlinkAll()`-method to active record to remove all records of a model relation (NmDimas, samdark, cebe)
- Enh #3521: Added `yii\filters\HttpCache::sessionCacheLimiter` (qiangxue)
- Enh #3542: Removed requirement to specify `extensions` in application config (samdark)
- Enh #3562: Adding rotateByCopy to yii\log\FileTarget (pawzar)
- Enh #3574: Add integrity check support for SQLite (zeeke)
- Enh #3597: Nested array support for HTML5 custom "data-*" attributes (armab)
- Enh #3607: Added support for limit in migrations actions: history, new, redo (Ragazzo)
- Enh #3631: Added property `currencyCode` to `yii\i18n\Formatter` (leandrogehlen)
- Enh #3636: Hide menu container tag with empty items in `yii\widgets\Menu` (arturf)
- Enh #3643: Improved Mime-Type detection by using the `mime.types` file from apache http project to dected mime types by file extension (cebe, pavel-voronin, trejder)
- Enh #3765: Added `yii\web\User::enableSession` to support authentication without using session (qiangxue)
- Enh #3708: Added database replication and automatic read-write splitting support for `yii\db\Connection` (qiangxue)
- Enh #3773: Added `FileValidator::mimeTypes` to support validating MIME types of files (Ragazzo)
- Enh #3774: Added `FileValidator::checkExtensionByMimeType` to support validating file types against file mime-types (Ragazzo)
- Enh #3801: Base migration controller `yii\console\controllers\BaseMigrateController` extracted (klimov-paul)
- Enh #3811: Now Gii model generator makes autocomplete for model class field (mitalcoi)
- Enh #3926: `yii\widgets\Breadcrumbs::$links`. Allows individual link to have its own `template` (creocoder, umneeq)
- Enh #3939: `\yii\Inflector::slug()` improvements (samdark)
    - Added protected `\yii\Inflector::transliterate()` that could be replaced with custom translit implementation.
    - Added proper tests for both intl-based slug and PHP fallback.
    - Removed character maps for non-latin languages.
    - Improved overall slug results.
    - Added note about the fact that intl is required for non-latin languages to requirements checker.
- Enh #3957: Added more straightforward configurable properties to `BlameableBehavior`, `SluggableBehavior` and `TimestampBehavior` (creocoder)
- Enh #3992: In mail layouts you can now access the message object via `$message` variable (qiangxue)
- Enh #4028: Added ability to `yii\widgets\Menu` to encode each item's label separately (creocoder, umneeq)
- Enh #4048: Added `init` event to `ActiveQuery` classes (qiangxue)
- Enh #4072: `\yii\rbac\PhpManager` adjustments (samdark)
    - Data is now stored in three separate files for items, assignments and rules. File format is simpler.
    - Removed `authFile`. Added `itemFile`, `assignmentFile` and `ruleFile`.
    - `createdAt` and `updatedAt` are now properly filled with corresponding file modification time.
    - `save()` and `load()` are now protected instead of public.
    - Added unit test for saving and loading data.
- Enh #4080: Added proper handling and support of the symlinked directories in `FileHelper`, added $options parameter in `FileHelper::removeDirectory()` (resurtm)
- Enh #4086: changedAttributes of afterSave Event now contain old values (dizews)
- Enh #4114: Added `Security::generateRandomBytes()`, improved tests (samdark)
- Enh #4122: `Html::error()` and `Html::errorSummary()` are now accepting `encode` option. If set to false it prevents encoding of error messages (samdark)
- Enh #4131: Security adjustments (tom--)
     - Added HKDF to `yii\base\Security`.
     - Reverted auto fallback to PHP PBKDF2.
     - Fixed PBKDF2 key truncation.
     - Adjusted API.
- Enh #4209: Added `beforeCopy`, `afterCopy`, `forceCopy` properties to AssetManager (cebe)
- Enh #4297: Added check for DOM extension to requirements (samdark)
- Enh #4317: Added `absoluteAuthTimeout` to yii\web\User (ivokund, nkovacs)
- Enh #4360: Added client validation support for file validator (Skysplit)
- Enh #4372: `yii\filters\HttpCache` failed to comply to RFC 7232 (DaSourcerer)
- Enh #4424: Added `inline` parameter to `yii\web\Response::xSendFile()` (klimov-paul)
- Enh #4436: Added callback functions to AJAX-based form validation (thiagotalma)
- Enh #4485: Added support for deferred validation in `ActiveForm` (Alex-Code)
- Enh #4520: Added sasl support to `yii\caching\MemCache` (xjflyttp)
- Enh #4559: Added `beforeValidateAll` and `afterValidateAll` callbacks to `ActiveForm` (Alex-Code)
- Enh #4566: Added client validation support for image validator (Skysplit, qiangxue)
- Enh #4581: Added ability to disable url encoding in `UrlRule` (tadaszelvys)
- Enh #4597: `yii\composer\Installer::setPermission()` supports setting permission for both directories and files now (qiangxue)
- Enh #4602: Added $key param in ActionColumn buttons Closure call (disem)
- Enh #4607: AR model will throw an exception if it does not have a primary key to avoid updating/deleting data massively (qiangxue)
- Enh #4630: Added automatic generating of unique slug value to `yii\behaviors\Sluggable` (klimov-paul)
- Enh #4636: Added `yii\web\Response::setDownloadHeaders()` (pawzar)
- Enh #4644: Added `yii\db\Schema::createColumnSchema()` to be able to customize column schema used (mcd-php)
- Enh #4656: HtmlPurifier helper config can now be a closure to change the purifier config object after it was created (Alex-Code)
- Enh #4062: Added 'caseSensitive' option to `yii\helpers\BaseFileHelper::findFiles()` (klimov-paul)
- Enh #4691: Encoding on `ActiveForm` and `ActiveField` validation errors is now configurable (Alex-Code)
- Enh #4740: Added `yii\web\Session::addFlash()` (restyler)
- Enh: Added support for using sub-queries when building a DB query with `IN` condition (qiangxue)
- Enh: Supported adding a new response formatter without the need to reconfigure existing formatters (qiangxue)
- Enh: Added `yii\web\UrlManager::addRules()` to simplify adding new URL rules (qiangxue)
- Enh: Added support to insert an event handler at the beginning of class-level event handler queue (qiangxue)
- Enh: Added `yii\console\Controller::EXIT_CODE_NORMAL` and `yii\console\Controller::EXIT_CODE_ERROR` constants (samdark)
- Enh: `yii\console\MigrateController` now returns `yii\console\Controller::EXIT_CODE_ERROR` in case of failed migration (samdark)
- Enh: Added method ErrorHandler::unregister() for unregistering the ErrorHandler (cebe)
- Enh: Added `all` option to `MigrateController::actionDown()` action (creocoder, umneeq)
- Enh: Added support for array attributes in `exist` validator (creocoder)
- Enh: Added support for using path alias with `FileDependency::fileName` (qiangxue)
- Enh: Added param `hideOnSinglePage` to `yii\widgets\LinkPager` (arturf)
- Enh: Added support for array attributes in `in` validator (creocoder)
- Enh: Improved `yii\helpers\Inflector::slug` to support more cases for Russian, Hebrew and special characters (samdark)
- Enh: ListView now uses the widget ID in the base tag, consistent to gridview (cebe)
- Chg #2287: Split `yii\db\ColumnSchema::typecast()` into two methods `phpTypecast()` and `dbTypecast()` to allow specifying PDO type explicitly (cebe)
- Chg #2898: `yii\console\controllers\AssetController` is now using hashes instead of timestamps (samdark)
- Chg #2913: RBAC `DbManager` is now initialized via migration (samdark)
- Chg #3036: Upgraded Twitter Bootstrap to 3.1.x (qiangxue)
- Chg #3175: InvalidCallException, InvalidParamException, UnknownMethodException are now extended from SPL BadMethodCallException (samdark)
- Chg #3358: Removed automatic CSRF meta tag generation by `View`. Added `Html::csrfMetaTags()` and its call to main layout files (qiangxue)
- Chg #3383: Added `$type` parameter to `IdentityInterface::findIdentityByAccessToken()` (qiangxue)
- Chg #3531: \yii\grid\GridView now allows any character (except ":") in the attribute part of the shorthand syntax for columns (rawtaz)
- Chg #3544: Added `$key` as a parameter to the callable specified via `yii\grid\DataColumn::value` (mdmunir)
- Chg #3611: Query caching is refactored. (qiangxue)
    - `yii\db\Connection::beginCache()` and `endCache()` are removed.
    - Added `yii\db\Connection::cache()` and `noCache()`.
    - Added `Command::cache()` and `noCache()`.
    - `yii\db\Connection::queryCacheDuration` is now used as a default cache duration parameter.
- Chg #3640: All cookies are now httpOnly by default in order to increase overall security (samdark)
- Chg #3687: Default `sourceLanguage` and `language` are now `en-US` in order for i18n formatter to work correctly (samdark)
- Chg #3804: Added `fileinfo` PHP extension to the basic requirement of Yii (Ragazzo)
- Chg #3866: The `FileValidator::types` property is renamed to `FileValidator::extensions` (Ragazzo)
- Chg #3897: Raised visibility of `yii\web\View::registerAssetFiles()` to protected (samdark)
- Chg #3899: Moved `MailEvent` class to `yii\mail` namespace (cebe)
- Chg #3956: Flash messages set via `Yii::$app->session->setFlash()` will be removed only if they are accessed (qiangxue)
- Chg #3989: The default value for `yii\log\FileTarget::$rotateByCopy` now defaults to true to work on windows by default (cebe)
- Chg #4051: Renamed `yii\caching\GroupDependency` to `TagDependency` and added support for associating multiple tags to a single cached data item (qiangxue)
- Chg #4071: `mail` component renamed to `mailer`, `yii\log\EmailTarget::$mail` renamed to `yii\log\EmailTarget::$mailer` (samdark)
- Chg #4147: `BaseMailer::compose()` will not overwrite the `message` parameter if it is explicitly provided (qiangxue)
- Chg #4188: API exceptions are now exposing less data when YII_DEBUG is false (samdark)
- Chg #4201: change default value of `SyslogTarget::facility` from LOG_SYSLOG to LOG_USER (dizews)
- Chg #4211: BaseActiveRecord::populateRecord now silently hide selected columns that are not defined in AR instead of failing with an error (miramir)
- Chg #4227: `\yii\widgets\LinkPager::$hideOnSinglePage` is now `true` by default (samdark)
- Chg #4310: Removed `$data` from signature of `yii\rbac\ManagerInterface` (samdark)
- Chg #4318: `yii\helpers\Html::ul()` and `ol()` will return an empty list tag if an empty item array is given (qiangxue)
- Chg #4331: `yii\helpers\Url` now uses `UrlManager` to determine base URL when generating URLs (qiangxue)
- Chg #4424: Added `inline` and `mimeType` options to all file downloading methods provided in `yii\web\Response` (qiangxue)
- Chg #4501: Renamed the constant `YII_PATH` to `YII2_PATH` (qiangxue)
- Chg #4586: Signed bigint and unsigned int will be converted into integers when they are loaded from DB by AR (qiangxue)
- Chg #4591: `yii\helpers\Url::to()` will no longer prefix relative URLs with the base URL (qiangxue)
- Chg #4595: `yii\widgets\LinkPager`'s `nextPageLabel`, `prevPageLabel`, `firstPageLabel`, `lastPageLabel` are now taking `false` instead of `null` for "no label" (samdark)
- Chg: Replaced `clearAll()` and `clearAllAssignments()` in `yii\rbac\ManagerInterface` with `removeAll()`, `removeAllRoles()`, `removeAllPermissions()`, `removeAllRules()` and `removeAllAssignments()` (qiangxue)
- Chg: Added `$user` as the first parameter of `yii\rbac\Rule::execute()` (qiangxue)
- Chg: `yii\grid\DataColumn::getDataCellValue()` visibility is now `public` to allow accessing the value from a GridView directly (cebe)
- Chg: `yii\data\ActiveDataProvider::$query` will not be modified directly with pagination and sorting anymore so it will be reuseable (cebe)
- Chg: Removed `yii\rest\ActiveController::$transactional` property and connected functionality (samdark)
- Chg: Changed the default value of the `keyPrefix` property of cache components to be null (qiangxue)
- Chg: Added `prefix` column to `yii\log\DbTarget` to have the same amount of information logged as in files and emails (cebe)
- Chg: Use `limit(null)` instead of `limit(-1)` in migration controller to be compatible to more backends (cebe)
- Chg: `yii\web\Request::cookieValidationKey` must be explicitly specified for each application that wants to use cookie validation (qiangxue)
- New #3911: Added `yii\behaviors\SluggableBehavior` that fills the specified model attribute with the transliterated and adjusted version to use in URLs (creocoder)
- New #4193: Added `yii\filters\Cors` CORS filter to allow Cross Origin Resource Sharing (pgaultier)
- New: Added `yii\base\InvalidValueException` (qiangxue)
- New: Added `yii\caching\ArrayCache` (cebe)


2.0.0-beta April 13, 2014
-------------------------

- Bug #1265: AssetController does not override 'js' and 'css' for compressed bundles (klimov-paul)
- Bug #1326: The `visible` setting for `DetailView` doesn't work as expected (qiangxue)
- Bug #1412: `FileValidator` and `ImageValidator` still trigger `uploadRequired` error in some case when `skipOnEmpty` is true and no upload is provided (qiangxue)
- Bug #1446: Logging while logs are processed causes infinite loop (qiangxue)
- Bug #1497: Localized view files are not correctly returned (mintao)
- Bug #1500: Log messages exported to files are not separated by newlines (omnilight, qiangxue)
- Bug #1504: Debug toolbar isn't loaded successfully in some environments when xdebug is enabled (qiangxue)
- Bug #1509: The SQL for creating Postgres RBAC tables is incorrect (qiangxue)
- Bug #1545: It was not possible to execute db Query twice, params where missing (cebe)
- Bug #1550: fixed the issue that JUI input widgets did not property input IDs.
- Bug #1654: Fixed the issue that a new message source object is generated for every new message being translated (qiangxue)
- Bug #1582: Error messages shown via client-side validation should not be double encoded (qiangxue)
- Bug #1591: StringValidator is accessing undefined property (qiangxue)
- Bug #1597: Added `enableAutoLogin` to basic and advanced application templates so "remember me" now works properly (samdark)
- Bug #1631: Charset is now explicitly set to UTF-8 when serving JSON (samdark)
- Bug #1635: `yii\jui\SliderInput` wasn't properly initialized (samdark)
- Bug #1659: MSSQL doesn't support limit (Ana1oliy)
- Bug #1686: ActiveForm is creating duplicated messages in error summary (qiangxue)
- Bug #1704: Incorrect regexp is used in `Inflector::camelize()` (qiangxue)
- Bug #1710: OpenId auth client does not request required attributes correctly (klimov-paul)
- Bug #1798: Fixed label attributes for array fields (zhuravljov)
- Bug #1800: Better check for `$_SERVER['HTTPS']` in `yii\web\Request::getIsSecureConnection()` (ginus, samdark)
- Bug #1812: Hide potential warning message due to race condition occurring to `Session::regenerateID()` call (qiangxue)
- Bug #1827: Debugger toolbar is loaded twice if an action is calling `run()` to execute another action (qiangxue)
- Bug #1868: Added ability to exclude tables from FixtureController apply/clear actions. (Ragazzo)
- Bug #1869: Fixed tables clearing. `TRUNCATE` changed to `DELETE` to avoid postgresql tables checks (and truncating all tables) (Ragazzo)
- Bug #1870: Validation errors weren't properly translated when using clientside validation (samdark)
- Bug #1930: Fixed domain based URL matching for website root (samdark)
- Bug #1937: Fixed wrong behavior or advanced app's `init --env` when called without parameter actually specified (samdark)
- Bug #1959: `Html::activeCheckbox` wasn't respecting custom values for checked/unchecked state (klevron, samdark)
- Bug #1965: `Controller::findLayoutFile()` returns incorrect file path when layout name starts with a slash (qiangxue)
- Bug #1992: In module scenario that use 'site/captcha' will get wrong refreshUrl (callmez)
- Bug #1993: afterFind event in AR is now called after relations have been populated (cebe, creocoder)
- Bug #1998: Unchecked required checkbox never pass client validation (klevron)
- Bug #2084: AssetController adjusting CSS URLs declared at same line fixed (klimov-paul)
- Bug #2091: `QueryBuilder::buildInCondition()` fails to handle array not starting with index 0 (qiangxue)
- Bug #2160: SphinxQL does not support OFFSET (qiangxue, romeo7)
- Bug #2209: When I18N message translation is missing source language is now used for formatting (samdark)
- Bug #2212: `yii\gridview\DataColumn` generates incorrect labels when used with nosql DB and there is no data (qiangxue)
- Bug #2298: Fixed the bug that Gii controller generator did not allow digit in the controller ID (qiangxue)
- Bug #2303: Fixed the bug that `yii\base\Theme::pathMap` did not support dynamic update with path aliases (qiangxue)
- Bug #2324: Fixed QueryBuilder bug when building a query with "query" option (mintao)
- Bug #2399: Fixed the bug that AssetBundle did not handle relative URLs correctly (qiangxue)
- Bug #2502: Unclear error message when `$_SERVER['DOCUMENT_ROOT']` is empty (samdark)
- Bug #2519: MessageSource removed translation messages when event handler was bound to `missingTranslation`-event (cebe)
- Bug #2527: Source language for `app` message category was always `en` no matter which application `sourceLanguage` was used (samdark)
- Bug #2559: Going back on browser history breaks GridView filtering with `Pjax` (tonydspaniard)
- Bug #2571: Fixed the bug that batchInsert will fail for SQLite if the values contain null or boolean false (qiangxue)
- Bug #2607: `yii message` tool wasn't updating `message` table (mitalcoi)
- Bug #2624: Html::textArea() should respect "name" option. (qiangxue)
- Bug #2653: Fixed the bug that unsetting an unpopulated AR relation would trigger exception (qiangxue)
- Bug #2681: Fixed the bug of php build-in server https://bugs.php.net/bug.php?id=66606 (dizews)
- Bug #2683: Fixed the bug that batchInsert will fail for MySQL if the values contain boolean false (qiangxue)
- Bug #2695: Fixed the issue that `FileValidator::isEmpty()` always returns true for validate multiple files (ZhandosKz)
- Bug #2739: Fixed the issue that `CreateAction::run()` was using obsolete `Controller::createAbsoluteUrl()` method (tonydspaniard)
- Bug #2740: Fixed the issue that `CaptchaAction::run()` was using obsolete `Controller::createUrl()` method (tonydspaniard)
- Bug #2760: Fixed GridView `filterUrl` parameters (qiangxue, AlexGx)
- Bug #2834: When overriding i18n translation sources from config using `app*` or `yii*` default `app` and `yii` sources were not removed (samdark)
- Bug #2848: Individual queries should be enclosed within parenthesis in a UNION query (qiangxue)
- Bug #2862: Using `DbCache` while enabling schema caching may cause infinite loops (qiangxue)
- Bug #3052: Fixed the issue that cache dependency data is not reused when `reusable` is set true (qiangxue)
- Bug #3443: Fixed `yii\bootstrap\Nav` and `yii\bootstrap\Dropdown` were generating wrong ids for submenus (arturf)
- Bug #3691: Fixed the issue that `CookieCollection::has` always returns false for cookies from browser (sonicgd)
- Bug #4212: MSSQL query builder should not generate the `ORDER BY` clause when it is not needed (qiangxue)
- Bug #4232: `TableSchema::sequenceName` for PostgreSQL should remove the enclosing quotes (katzz0, qiangxue)
- Bug #4697: MSSQL query builder does not work for newer MSSQL versions when LIMIT is used without ORDER BY (qiangxue)
- Bug: Fixed `Call to a member function registerAssetFiles() on a non-object` in case of wrong `sourcePath` for an asset bundle (samdark)
- Bug: Fixed incorrect event name for `yii\jui\Spinner` (samdark)
- Bug: Json::encode() did not handle objects that implement JsonSerializable interface correctly (cebe)
- Bug: Fixed issue with tabular input on ActiveField::radio() and ActiveField::checkbox() (jom)
- Bug: Fixed the issue that query cache returns the same data for the same SQL but different query methods (qiangxue)
- Bug: Fixed URL parsing so it's now properly giving 404 for URLs like `http://example.com//////site/about` (samdark)
- Bug: Fixed `HelpController::getModuleCommands` issue where it attempts to scan a module's controller directory when it doesn't exist (jom)
- Bug: Fixed an issue with FileHelper and not accessible directories which resulted in endless loop (cebe)
- Bug: Fixed `$model->load($data)` returned `true` if `$data` and `formName` were empty (samdark)
- Bug: Fixed issue with `ActiveRelationTrait` preventing `ActiveQuery` from clearing events and behaviors on clone (jom)
- Bug: `Query::queryScalar` wasn't making `SELECT DISTINCT` queries subqueries (jom)
- Bug: Fixed use `$files` instead of `self::$_files[$key]` to allow inheritance (pgaultier)
- Enh #46: Added Image extension based on [Imagine library](http://imagine.readthedocs.org) (tonydspaniard)
- Enh #364: Improve Inflector::slug with `intl` transliteration. Improved transliteration char map. (tonydspaniard)
- Enh #497: Removed `\yii\log\Target::logUser` and added `\yii\log\Target::prefix` to support customizing message prefix (qiangxue)
- Enh #499: Decoupled `Rule` from RBAC `Item` (samdark, qiangxue)
- Enh #797: Added support for validating multiple columns by `UniqueValidator` and `ExistValidator` (qiangxue)
- Enh #802: Added support for retrieving sub-array element or child object property through `ArrayHelper::getValue()` (qiangxue, cebe)
- Enh #938: Added `yii\web\View::renderAjax()` and `yii\web\Controller::renderAjax()` (qiangxue)
- Enh #1293: Replaced Console::showProgress() with a better approach. See Console::startProgress() for details (cebe)
- Enh #1406: DB Schema support for Oracle Database (p0larbeer, qiangxue)
- Enh #1437: Added ListView::viewParams (qiangxue)
- Enh #1467: Added support for organizing controllers in subdirectories (qiangxue)
- Enh #1469: ActiveRecord::find() now works with default conditions (default scope) applied by createQuery (cebe)
- Enh #1476: Add yii\web\Session::handler property (nineinchnick)
- Enh #1499: Added `ActionColumn::controller` property to support customizing the controller for handling GridView actions (qiangxue)
- Enh #1523: Query conditions now allow to use the NOT operator (cebe)
- Enh #1535: Improved `yii\web\User` to start session only when needed. Also prepared it for use without session. (qiangxue)
- Enh #1562: Added `yii\bootstrap\Tabs::linkOptions` (kartik-v)
- Enh #1572: Added `yii\web\Controller::createAbsoluteUrl()` (samdark)
- Enh #1579: throw exception when the given AR relation name does not match in a case sensitive manner (qiangxue)
- Enh #1581: Added `ActiveQuery::joinWith()` and `ActiveQuery::innerJoinWith()` to support joining with relations (qiangxue)
- Enh #1585: added schema parameter to createAbsoluteUrl() to force 'http' or 'https' (cebe)
- Enh #1601: Added support for tagName and encodeLabel parameters in ButtonDropdown (omnilight)
- Enh #1611: Added `BaseActiveRecord::markAttributeDirty()` (qiangxue)
- Enh #1633: Advanced application template now works with MongoDB by default (samdark)
- Enh #1634: Use masked CSRF tokens to prevent BREACH exploits (qiangxue)
- Enh #1641: Added `BaseActiveRecord::updateAttributes()` (qiangxue)
- Enh #1646: Added postgresql `QueryBuilder::checkIntegrity` and `QueryBuilder::resetSequence` (Ragazzo)
- Enh #1645: Added `Connection::$pdoClass` property (Ragazzo)
- Enh #1645: Added support for nested DB transactions (qiangxue)
- Enh #1681: Added support for automatically adjusting the "for" attribute of label generated by `ActiveField::label()` (qiangxue)
- Enh #1706: Added support for registering a single JS/CSS file with dependency (qiangxue)
- Enh #1773: keyPrefix property of Cache is not restricted to alnum characters anymore, however it is still recommended (cebe)
- Enh #1809: Added support for building "EXISTS" and "NOT EXISTS" query conditions (abdrasulov)
- Enh #1839: Added support for getting file extension and basename from uploaded file (anfrantic)
- Enh #1852: ActiveRecord::tableName() now returns table name using DbConnection::tablePrefix (creocoder)
- Enh #1881: Improved `yii\bootstrap\NavBar` with `containerOptions`, `innerContainerOptions` and `renderInnerContainer` (creocoder)
- Enh #1894: The path aliases `@webroot` and `@web` are now available right after the application is initialized (qiangxue)
- Enh #1921: Grid view ActionColumn now allow to name buttons like `{controller/action}` (creocoder)
- Enh #1973: `yii message/extract` is now able to generate `.po` files (SergeiKutanov, samdark)
- Enh #1984: ActionFilter will now mark event as handled when action run is aborted (cebe)
- Enh #2002: Added filterWhere() method to yii\db\Query to allow easy addition of search filter conditions by ignoring empty search fields (samdark, cebe)
- Enh #2003: Added `filter` property to `ExistValidator` and `UniqueValidator` to support adding additional filtering conditions (qiangxue)
- Enh #2008: `yii message/extract` is now able to save translation strings to database (kate-kate, samdark)
- Enh #2043: Added support for custom request body parsers (danschmidt5189, cebe)
- Enh #2051: Do not save null data into database when using RBAC (qiangxue)
- Enh #2054: Added support for using custom application configuration with the console command runner (qiangxue)
- Enh #2079:
    - i18n now falls back to `en` from `en-US` if message translation isn't found (samdark)
    - View now falls back to `en` from `en-US` if file not found (samdark)
    - Default `sourceLanguage` and `language` are now `en` (samdark)
- Enh #2101: Gii is now using model labels when generating search (thiagotalma)
- Enh #2102: DetailView now allow use `category.name` as attribute name (creocoder)
- Enh #2102: DetailView now allow use custom label in string format like `name:format:label` (creocoder)
- Enh #2103: Renamed AccessDeniedHttpException to ForbiddenHttpException, added new commonly used HTTP exception classes (danschmidt5189)
- Enh #2124: Added support for UNION ALL queries (Ivan Pomortsev, iworker)
- Enh #2132: Allow url of CSS and JS files registered in yii\web\View to be url alias (cebe)
- Enh #2144: `Html` helper now supports rendering "data" attributes (qiangxue)
- Enh #2156: `yii migrate` now automatically creates `migrations` directory if it does not exist (samdark)
- Enh #2211: Added typecast database types into php types (dizews)
- Enh #2240: Improved `yii\web\AssetManager::publish()`, `yii\web\AssetManager::getPublishedPath()` and `yii\web\AssetManager::getPublishedUrl()` to support aliases (vova07)
- Enh #2325: Adding support for the `X-HTTP-Method-Override` header in `yii\web\Request::getMethod()` (pawzar)
- Enh #2364: Take into account current error reporting level in error handler (gureedo)
- Enh #2387: Added support for fetching data from database in batches (nineinchnick, qiangxue)
- Enh #2392: Added `addCssStyle()`, `removeCssStyle()`, `cssStyleFromArray()` and `cssStyleToArray()` to `Html` (qiangxue, kartik-v, Alex-Code)
- Enh #2406: Added support for conditional validation (drenty, cebe, qiangxue)
- Enh #2411: Added Gii extension generator (schmunk42)
- Enh #2415: Added support for inverse relations (qiangxue)
- Enh #2417: Added possibility to set `dataType` for `$.ajax` call in yii.activeForm.js (Borales)
- Enh #2436: Label of the attribute, which looks like `relatedModel.attribute`, will be received from the related model if it available (djagya)
- Enh #2490: `yii\db\Query::count()` and other query scalar methods now properly handle queries with GROUP BY clause (qiangxue)
- Enh #2491: Added support for using the same base class name of search model and data model in Gii (qiangxue)
- Enh #2499: Added ability to downgrade migrations by their absolute apply time (resurtm, gorcer)
- Enh #2525: Added support for formatting file sizes with `yii\base\Formatter` (VinceG)
- Enh #2526: Allow for null values in batchInsert (skotos)
- Enh #2646: Added support for specifying hostinfo in the pattern of a URL rule (qiangxue)
- Enh #2661: Added boolean column type support for SQLite (qiangxue)
- Enh #2670: Changed `console\Controller::globalOptions()` to `options($actionId)` to (make it possible to) differentiate options per action (hqx)
- Enh #2714: Added support for formatting time intervals relative to the current time with `yii\base\Formatter` (drenty)
- Enh #2726: Added `yii\db\ActiveRecord::loadDefaultValues()` that fills default values from DB schema (samdark)
- Enh #2729: Added `FilterValidator::skipOnArray` so that filters like `trim` will not fail for array inputs (qiangxue)
- Enh #2735: Added support for `DateTimeInterface` in `Formatter` (ivokund)
- Enh #2756: Added support for injecting custom `isEmpty` check for all validators (qiangxue)
- Enh #2775: Added `yii\base\Application::bootstrap` and `yii\base\BootstrapInterface` to support running bootstrap classes when starting an application (qiangxue)
- Enh #2892: ActiveRecord dirty attributes are now reset after call to `afterSave()` so information about changed attributes is available in `afterSave`-event (cebe)
- Enh #2910: Added `Application::end()` (qiangxue)
- Enh: Added support for using arrays as option values for console commands (qiangxue)
- Enh: Added `favicon.ico` and `robots.txt` to default application templates (samdark)
- Enh: Added `Widget::autoIdPrefix` to support prefixing automatically generated widget IDs (qiangxue)
- Enh: Support for file aliases in console command 'message' (omnilight)
- Enh: Sort and Pagination can now create absolute URLs (cebe)
- Enh: Added support for using array-typed arguments for console commands (qiangxue)
- Enh: Added support for installing packages conforming to PSR-4 standard (qiangxue)
- Enh: Better exception message when class cannot be loaded (samdark)
- Enh: `init` of advanced application now allows to specify answer for overwriting files via `init --overwrite=n` (samdark)
- Enh: Added `TableSchema::fullName` property (qiangxue)
- Enh: yii\codeception\TestCase now supports loading and using fixtures via Yii fixture framework (qiangxue)
- Enh: Added ability to get incoming headers (dizews)
- Enh: Added `beforeRun()` and `afterRun()` to `yii\base\Action` (qiangxue)
- Enh: Added support for using timeZone with `yii\base\Formatter` (dizews)
- Enh: Added `yii\web\View::POS_LOAD` (qiangxue)
- Enh: Added `yii\web\Response::clearOutputBuffers()` (qiangxue)
- Enh: Improved `QueryBuilder::buildLimit()` to support big numbers (qiangxue)
- Enh: Added support for building SQLs with sub-queries (qiangxue)
- Enh: Added `Pagination::getLinks()` (qiangxue)
- Enh: Added support for reading page size from query parameters by `Pagination` (qiangxue)
- Enh: LinkPager can now register relational link tags in the html header for prev, next, first and last page (cebe)
- Enh: Added `yii\web\UrlRuleInterface` and `yii\web\CompositeUrlRule` (qiangxue)
- Enh: Added `yii\web\Request::getAuthUser()` and `getAuthPassword()` (qiangxue)
- Enh: Added summaryOptions and emptyTextOptions to BaseListView (johonunu)
- Enh: Implemented Oracle column comment reading from another schema (gureedo, samdark)
- Enh: Added support to allow an event handler to be inserted at the beginning of the existing event handler list (qiangxue)
- Enh: Improved action filter and action execution flow by supporting installing action filters at controller, module and application levels (qiangxue)
- Enh: Added `isAssociative()` and `isIndexed()` to `yii\helpers\ArrayHelper` (qiangxue)
- Enh: Added `addSelect` to `yii\db\Query` (Alex-Code)
- Enh: Added ODBC support in `yii\db\Connection` (nineinchnick, resurtm)
- Chg #47: Changed Markdown library to cebe/markdown and adjusted Markdown helper API (cebe)
- Chg #735: Added back `ActiveField::hiddenInput()` (qiangxue)
- Chg #1186: Changed `Sort` to use comma to separate multiple sort fields and use negative sign to indicate descending sort (qiangxue)
- Chg #1519: `yii\web\User::loginRequired()` now returns the `Response` object instead of exiting the application (qiangxue)
- Chg #1564: Removed `yii\web\Session::autoStart` and added `hasSessionId`. Session will be automatically started when accessing session data (qiangxue)
- Chg #1586: `QueryBuilder::buildLikeCondition()` will now escape special characters and use percentage characters by default (qiangxue)
- Chg #1610: `Html::activeCheckboxList()` and `Html::activeRadioList()` will submit an empty string if no checkbox/radio is selected (qiangxue)
- Chg #1643: Added default value for `Captcha::options` (qiangxue)
- Chg #1796: Removed `yii\base\Controller::getActionParams()` (samdark)
- Chg #1835: `CheckboxColumn` now renders checkboxes whose values are the corresponding data key values (qiangxue)
- Chg #1821: Changed default values for yii\db\Connection username and password to null (cebe)
- Chg #1844: `Response::sendFile()` and other file sending methods will not send the response (qiangxue)
- Chg #1852: DbConnection::tablePrefix default value now 'tbl_' (creocoder)
- Chg #1958: `beforeSubmit` in `yii.activeform` is now executed after validation and before form submission (6pblcb)
- Chg #2025: Removed ability to declare scopes in ActiveRecord (samdark)
- Chg #2043:
    - Renamed `yii\web\Request::acceptedLanguages` to `acceptableLanguages` (qiangxue)
    - Removed `yii\web\Request::getPost()`, `getPut()`, `getDelete()`, `getPatch()` in favor of `getBodyParam()` (cebe)
    - Renamed `yii\web\Request::get()` to `getQueryParams()` and `getRestParams()` to `getBodyParams()` (cebe)
    - Added `yii\web\Request::get($name = null, $defaultValue = null)` and `yii\web\Request::post($name = null, $defaultValue = null)` (samdark)
- Chg #2059: Implemented git-flavored file excluding/filtering for `FileHelper` (nineinchnick)
- Chg #2063: Removed `yii\web\Request::acceptTypes` and renamed `yii\web\Request::acceptedContentTypes` to `acceptableContentTypes` (qiangxue)
- Chg #2103: Renamed AccessDeniedHttpException to ForbiddenHttpException (danschmidt5189)
- Chg #2146: Removed `ActiveRelation` class and `ActiveRelationInterface`, moved the functionality to `ActiveQuery`.
             All relational queries are now directly served by `ActiveQuery` allowing to use custom scopes in relations
             and also to declare arbitrary queries as relations.
             Also removed `ActiveRecordInterface::createActiveRelation()` (cebe)
- Chg #2157: The '*' category pattern will match all categories that do not match any other patterns listed in `I18N::translations` (qiangxue, Ragazzo)
- Chg #2161: Added ability to use `return` in `Widget::run` (samdark)
- Chg #2173: Removed `StringHelper::diff()`, Moved `phpspec/php-diff` dependency from `yiisoft/yii2` to `yiisoft/yii2-gii` (samdark)
- Chg #2175: QueryBuilder will now append UNION statements at the end of the primary SQL (qiangxue)
- Chg #2210: Mysql driver will now treat `tinyint(1)` as integer instead of boolean (qiangxue)
- Chg #2248: Renamed `yii\base\Model::DEFAULT_SCENARIO` to `yii\base\Model::SCENARIO_DEFAULT` (samdark)
- Chg #2281: Renamed `ActiveRecord::create()` to `populateRecord()` and changed signature. This method will not call instantiate() anymore (cebe)
- Chg #2405: The CSS class of `MaskedInput` now defaults to `form-control` (qiangxue)
- Chg #2426: Changed URL creation method signatures to be consistent (samdark)
- Chg #2516: Moved error handling from application to ErrorHandler class and fixed problems with HTTP Exception response code (cebe)
    - `Yii::$app->exception` has now moved to `Yii::$app->errorHandler->exception`
    - `yii\base\ErrorHandler` was split into `yii\web\ErrorHandler` and `yii\console\ErrorHandler`
- Chg #2544: Changed `DetailView`'s `name:format:label` to `attribute:format:label` to match `GridView` (samdark)
- Chg #2603: `yii\base\ErrorException` now extends `\ErrorException` (samdark)
- Chg #2629: `Module::controllerPath` is now read only, and all controller classes must be namespaced under `Module::controllerNamespace`. (qiangxue)
- Chg #2630: API changes for URLs generation (samdark, qiangxue, cebe)
    - Added `yii\helpers\Url`.
    - Removed `yii\helpers\Html::url`, use `yii\helpers\Url::to` instead.
    - Removed `yii\web\Controller::createUrl` and `yii\web\Controller::createAbsoluteUrl`, use `yii\helpers\Url::toRoute` instead.
    - Removed `yii\web\Controller::getCanonicalUrl`, use `yii\helpers\Url::canonical` instead.
- Chg #2691: Null parameters will not be included in the generated URLs by `UrlManager` (gonimar, qiangxue)
- Chg #2734: `FileCache::keyPrefix` defaults to empty string now (qiangxue)
- Chg #2796: Removed `Application::preload` in favor of `Application::bootstrap` (qiangxue)
- Chg #2816: Changed default date and time format of `yii\base\Formatter` to `Y-m-d` and `H:i:s` (qiangxue)
- Chg #2911: Removed `tbl_` default for table prefix (samdark)
- Chg #2912: Relative view files will be looked for under the directory containing the view currently being rendered (qiangxue)
- Chg #2955: Changed the signature of ActiveQuery constructors and replaced `ActiveRecord::createQuery()` with `find()` to simplify customizing ActiveQuery classes (qiangxue)
- Chg #2999: Added `findOne()` and `findAll()` to replace the usage of `ActiveRecord::find($condition)`. (samdark, qiangxue)
- Chg #4204: `yii\web\Request::getUserIP()` will return null if it cannot detect user IP address (qiangxue)
- Chg #4622: Simplified the way of creating a Faker fixture template file (qiangxue)
- Chg: Renamed `yii\jui\Widget::clientEventsMap` to `clientEventMap` (qiangxue)
- Chg: Renamed `ActiveRecord::getPopulatedRelations()` to `getRelatedRecords()` (qiangxue)
- Chg: Renamed `attributeName` and `className` to `targetAttribute` and `targetClass` for `UniqueValidator` and `ExistValidator` (qiangxue)
- Chg: Added `yii\widgets\InputWidget::options` (qiangxue)
- Chg: Changed the signature of `urlCreator` and button creators for `yii\gridview\ActionColumn` (qiangxue)
- Chg: Updated HTMLPurified dependency to `4.6.*`.
- Chg: Changed Yii autoloader to support loading PSR-4 classes only (i.e. PEAR-styled classes not supported anymore) (qiangxue)
- Chg: Changed the directory structure according to PSR-4. You have to update your application `index.php`,
       `index-test.php` and `yii` files to point to the new location of `Yii.php` (qiangxue, cebe)
- Chg: Advanced app template: moved database connection DSN, login and password to `-local` config not to expose it to VCS (samdark)
- Chg: Renamed `yii\web\Request::acceptedLanguages` to `acceptableLanguages` (qiangxue)
- Chg: Removed implementation of `Arrayable` from `yii\Object` (qiangxue)
- Chg: The scripts in asset bundles are now registered in `View` at the end of `endBody()`. It was done in `endPage()` previously (qiangxue)
- Chg: Renamed `csrf-var` to `csrf-param` for CSRF header name (Dilip)
- Chg: The directory holding email templates is renamed from `mails` to `mail` (qiangxue)
- Chg: Renamed properties `fooVar` to `fooParam` for various classes (qiangxue)
    - Renamed `ActiveForm::ajaxVar` to `ajaxParam`
    - Renamed `Pagination::pageVar` to `pageParam`
    - Renamed `Sort::sortVar` to `sortParam`
    - Renamed `yii\web\Request::csrfVar` to `csrfParam`
    - Renamed `yii\web\Request::methodVar` to `methodParam`
    - Renamed `UrlManager::routeVar` to `routeParam`
    - Renamed `yii\web\Session::flashVar` to `flashParam`
    - Renamed `yii\web\User::idVar` to `idParam`
    - Renamed `yii\web\User::authTimeoutVar` to `authTimeoutParam`
    - Renamed `yii\web\User::returnUrlVar` to `returnUrlParam`
- Chg: Added `View::viewFile` and removed `ViewEvent::viewFile` (qiangxue)
- Chg: Changed `Controller::afterAction()`, `Module::afterAction()` and `ActionFilter::afterAction()` to pass `$result` by value instead of reference (qiangxue)
- Chg: `yii\base\Extension::init()` is renamed to `bootstrap()` (qiangxue)
- Chg: `getComponent()` and `setComponent()` in `Application` and `Module` are renamed to `get()` and `set()` respectively. (qiangxue)
- Chg: The signature of `Yii::createObject()` is changed. Constructor parameters must be passed as the second parameter. (qiangxue)
- Chg: `Yii::$objectConfig` is removed. You should use `Yii::$container->set()` to configure default settings of classes. (qiangxue)
- Chg: Removed `yii\grid\Column::getDataCellContent()` and renamed `yii\grid\DataColumn::getDataCellContent()` to `yii\grid\DataColumn::getDataCellValue()` (cebe)
- Chg: `yii\log\Logger` is split into `yii\log\Logger` and `yii\log\Dispatcher`. (qiangxue)
- Chg: Moved all filter classes to namespace `yii\filters` (qiangxue)
- Chg: Re-implemented RBAC by following more closely to the original NIST RBAC model. Dropped `yii\rbac\PhpManager`. (qiangxue)
- Chg: Renamed `yii\web\User::checkAccess()` to `yii\web\User::can()` (qiangxue)
- New #66: [Auth client library](https://github.com/yiisoft/yii2-authclient) OpenId, OAuth1, OAuth2 clients (klimov-paul)
- New #303: Added built-in support for REST API (qiangxue)
- New #503: Added `yii\di\Container` and `yii\di\ServiceLocator` (qiangxue)
- New #706: Added `yii\widgets\Pjax` and enhanced `GridView` to work with `Pjax` to support AJAX-update (qiangxue)
- New #1393: [Codeception testing framework integration](https://github.com/yiisoft/yii2-codeception) (Ragazzo)
- New #1438: [MongoDB integration](https://github.com/yiisoft/yii2-mongodb) ActiveRecord and Query (klimov-paul)
- New #1956: Implemented test fixture framework (qiangxue)
- New #2034: Added `ContentNegotiator` to support response format and language negotiation (qiangxue)
- New #2149: Added `yii\base\DynamicModel` to support ad-hoc data validation (qiangxue)
- New #2360: Added `AttributeBehavior` and `BlameableBehavior`, and renamed `AutoTimestamp` to `TimestampBehavior` (lucianobaraglia, qiangxue)
- New #2932: Added `yii\web\ViewAction` that allow you to render views based on GET parameter (samdark)
- New #2998: Added `framework\log\SyslogTarget` that is able to write log to syslog (miramir, samdark)
- New #3029: Added `yii\bootstrap\ActiveForm` and `yii\bootstrap\ActiveField` (mikehaertl)
- New #4640: Added `yii\widgets\ActiveForm::beginField()` and `endField()` (qiangxue)
- New: Yii framework now comes with core messages translated into 26 languages, many thanks to all our translators!
- New: Added `yii\codeception\DbTestCase` (qiangxue)
- New: Added `yii\web\GroupUrlRule` (qiangxue)
- New: Added `yii\filters\RateLimiter` (qiangxue)
- New: Added various authentication methods, including `HttpBasicAuth`, `HttpBearerAuth`, `QueryParamAuth`, and `CompositeAuth` (qiangxue)
- New: Added `HtmlResponseFormatter` and `JsonResponseFormatter` (qiangxue)

2.0.0-alpha, December 1, 2013
-----------------------------

- Initial release.
- Official extensions released in this version:
  - [Twitter bootstrap 3.0](https://github.com/yiisoft/yii2-bootstrap)
  - [Jquery UI](https://github.com/yiisoft/yii2-jui)

  - [Debug Toolbar](https://github.com/yiisoft/yii2-debug)
  - [Gii code generator](https://github.com/yiisoft/yii2-gii)

  - [Elasticsearch integration](https://github.com/yiisoft/yii2-elasticsearch): ActiveRecord and Query
  - [Redis integration](https://github.com/yiisoft/yii2-redis): ActiveRecord, Cache and Session
  - [Sphinx integration](https://github.com/yiisoft/yii2-sphinx): ActiveRecord and Query

  - [Swiftmailer](https://github.com/yiisoft/yii2-swiftmailer)

  - [Smarty View Renderer](https://github.com/yiisoft/yii2-smarty)
  - [Twig View Renderer](https://github.com/yiisoft/yii2-twig)
