fix issue with composite key in combination with join

fixes #10201
fixes #9047
close #9895

framework/CHANGELOG.md

@@ -12,6 +12,7 @@ Yii Framework 2 Change Log
 - Bug #11196: Fixed VarDumper throws PHP Fatal when dumping `__PHP_Incomplete_Class` (DamianZ)
 - Bug #7627: Fixed `yii\widgets\ActiveField` to handle inputs AJAX validation with changed ID properly (dizeee)
 - Bug #9851: Fixed partial commit / rollback in nested transactions (sammousa)
+- Bug #10201: Fixed bug in ActiveRecord, where relational data could not be fetched in case with composite key and join with IN condition (PaulVanSchayck, airmoi, joe-meyer, cebe)
 - Bug #10480: Fixed removing old identity cookie when loggin in as another user without logging out first (maine-mike)
 - Bug #10617: Fixed `yii\web\Request::getBodyParams()` returned `null` instead of empty array if request body is empty and content type is application/json (samdark)
 - Bug #10784: Fixed `yii\grid\CheckboxColumn` to set correct value when `yii\grid\CheckboxColumn::$checkboxOptions` closure is used (nukkumatti)

framework/db/ActiveRelationTrait.php

@@ -469,9 +469,15 @@ trait ActiveRelationTrait
             }
         } else {
             // composite keys
+
+            // ensure keys of $this->link are prefixed the same way as $attributes
+            $prefixedLink = array_combine(
+                $attributes,
+                array_values($this->link)
+            );
             foreach ($models as $model) {
                 $v = [];
-                foreach ($this->link as $attribute => $link) {
+                foreach ($prefixedLink as $attribute => $link) {
                     $v[$attribute] = $model[$link];
                 }
                 $values[] = $v;