Added key param to ActionColumn button Closure

framework/CHANGELOG.md

@@ -171,6 +171,7 @@ Yii Framework 2 Change Log
 - 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 #4602: Added $key param in ActionColumn buttons Closure call (disem)
 - 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)

framework/grid/ActionColumn.php

@@ -54,20 +54,20 @@ class ActionColumn extends Column
      * signature:
      *
      * ```php
-     * function ($url, $model) {
+     * function ($url, $model, $key) {
      *     // return the button HTML code
      * }
      * ```
      *
-     * where `$url` is the URL that the column creates for the button, and `$model` is the model object
-     * being rendered for the current row.
+     * where `$url` is the URL that the column creates for the button, `$model` is the model object
+     * being rendered for the current row, and `$key` is the key of the model in the data provider array.
      *
      * You can add further conditions to the button, for example only display it, when the model is
      * editable (here assuming you have a status field that indicates that):
      *
      * ```php
      * [
-     *     'update' => function ($url, $model) {
+     *     'update' => function ($url, $model, $key) {
      *         return $model->status == 'editable' ? Html::a('Update', $url) : '';
      *     };
      * ],
@@ -155,7 +155,7 @@ class ActionColumn extends Column
             if (isset($this->buttons[$name])) {
                 $url = $this->createUrl($name, $model, $key, $index);
 
-                return call_user_func($this->buttons[$name], $url, $model);
+                return call_user_func($this->buttons[$name], $url, $model, $key);
             } else {
                 return '';
             }