made indexBy callable like db AR

framework/yii/redis/ActiveQuery.php

@@ -642,7 +642,12 @@ class ActiveQuery extends \yii\base\Component
 				return $rows;
 			}
 			foreach ($rows as $row) {
-				$models[$row[$this->indexBy]] = $row;
+				if (is_string($this->indexBy)) {
+					$key = $row[$this->indexBy];
+				} else {
+					$key = call_user_func($this->indexBy, $row);
+				}
+				$models[$key] = $row;
 			}
 		} else {
 			/** @var $class ActiveRecord */
@@ -654,7 +659,12 @@ class ActiveQuery extends \yii\base\Component
 			} else {
 				foreach ($rows as $row) {
 					$model = $class::create($row);
-					$models[$model->{$this->indexBy}] = $model;
+					if (is_string($this->indexBy)) {
+						$key = $model->{$this->indexBy};
+					} else {
+						$key = call_user_func($this->indexBy, $model);
+					}
+					$models[$key] = $model;
 				}
 			}
 		}

tests/unit/framework/redis/ActiveRecordTest.php

@@ -159,6 +159,16 @@ class ActiveRecordTest extends RedisTestCase
 		$this->assertTrue($customers['user1'] instanceof Customer);
 		$this->assertTrue($customers['user2'] instanceof Customer);
 		$this->assertTrue($customers['user3'] instanceof Customer);
+
+		// indexBy callable
+		$customers = Customer::find()->indexBy(function ($customer) {
+			return $customer->id . '-' . $customer->name;
+//		})->orderBy('id')->all();
+		})->all();
+		$this->assertEquals(3, count($customers));
+		$this->assertTrue($customers['1-user1'] instanceof Customer);
+		$this->assertTrue($customers['2-user2'] instanceof Customer);
+		$this->assertTrue($customers['3-user3'] instanceof Customer);
 	}
 
 	public function testFindCount()