Fixes #7074: `yii\data\ArrayDataProvider` did not correctly handle the case…

framework/CHANGELOG.md

@@ -8,6 +8,7 @@ Yii Framework 2 Change Log
 - Bug #6940: `yii\web\Response::sendContentAsFile()` may not send correct `content-length` header (sadgnome)
 - Bug #6969: `yii\helpers\ArrayHelper::htmlEncode()` and `htmlDecode()` should not remove non-string data (qiangxue)
 - Bug #7037: `yii\console\controllers\AssetController` now correctly handles relative image URLs if source and target CSS are under same directory (klimov-paul)
+- Bug #7074: `yii\data\ArrayDataProvider` did not correctly handle the case `Pagination::pageSize = 0` (kirsenn, qiangxue)
 - Enh #5663: Added support for using `data-params` to specify additional form data to be submitted via the `data-method` approach (usualdesigner, qiangxue)
 - Enh #6106: Added ability to specify `encode` for each item of `yii\widgets\Breadcrumbs` (samdark, aleksanderd)
 - Enh #6493: Added support for the `Access-Control-Expose-Headers` header by `yii\filters\Cors` (usualdesigner)

framework/data/ArrayDataProvider.php

@@ -80,8 +80,11 @@ class ArrayDataProvider extends BaseDataProvider
 
         if (($pagination = $this->getPagination()) !== false) {
             $pagination->totalCount = $this->getTotalCount();
+
+            if ($pagination->getPageSize() > 0) {
                 $models = array_slice($models, $pagination->getOffset(), $pagination->getLimit());
             }
+        }
 
         return $models;
     }

framework/data/Pagination.php

@@ -203,7 +203,8 @@ class Pagination extends Object implements Linkable
      * Returns the number of items per page.
      * By default, this method will try to determine the page size by [[pageSizeParam]] in [[params]].
      * If the page size cannot be determined this way, [[defaultPageSize]] will be returned.
-     * @return integer the number of items per page.
+     * @return integer the number of items per page. If it is less than 1, it means the page size is infinite,
+     * and thus a single page contains all items.
      * @see pageSizeLimit
      */
     public function getPageSize()