Added test cases.

CHANGELOG-2.1.md

@@ -1,5 +1,9 @@
 # v2.1.15 - TBD
 
+## Added
+
+- [#3484](https://github.com/hyperf/hyperf/pull/3484) Added methods `withMax()` `withMin()` `withSum()` and `withAvg()`.
+
 # v2.1.14 - 2021-04-12
 
 ## Fixed

docs/zh-cn/changelog.md

@@ -2,12 +2,12 @@
 
 # v2.1.14 - 2021-04-12
 
-## Fixed
+## 修复
 
 - [#3465](https://github.com/hyperf/hyperf/pull/3465) 修复协程风格下，`WebSocket` 服务不支持配置多个端口的问题。
 - [#3467](https://github.com/hyperf/hyperf/pull/3467) 修复协程风格下，`WebSocket` 服务无法正常释放连接池的问题。
 
-## Added
+## 新增
 
 - [#3472](https://github.com/hyperf/hyperf/pull/3472) 新增方法 `Sender::getResponse()`，可以在协程风格的 `WebSocket` 服务里，获得与 `fd` 一一对应的 `Response` 对象。
 

src/database/src/Model/Relations/Relation.php

@@ -336,6 +336,8 @@ abstract class Relation
     /**
      * Get a relationship join table hash.
      *
+     * For safety, The relationship ensures this method is only used in the same coroutine.
+     *
      * @return string
      */
     public function getRelationCountHash(bool $incrementJoinCount = true)

src/database/tests/ModelBuilderTest.php

@@ -681,6 +681,15 @@ class ModelBuilderTest extends TestCase
         $this->assertEquals('select "model_builder_test_model_parent_stubs".*, (select count(*) from "model_builder_test_model_close_related_stubs" where "model_builder_test_model_parent_stubs"."foo_id" = "model_builder_test_model_close_related_stubs"."id") as "foo_count" from "model_builder_test_model_parent_stubs"', $builder->toSql());
     }
 
+    public function testWithMax()
+    {
+        $model = new ModelBuilderTestModelParentStub();
+
+        $builder = $model->withMax('foo', 'id');
+
+        $this->assertEquals('select "model_builder_test_model_parent_stubs".*, (select max("model_builder_test_model_close_related_stubs"."id") from "model_builder_test_model_close_related_stubs" where "model_builder_test_model_parent_stubs"."foo_id" = "model_builder_test_model_close_related_stubs"."id") as "foo_max_id" from "model_builder_test_model_parent_stubs"', $builder->toSql());
+    }
+
     public function testWithCountAndSelect()
     {
         $model = new ModelBuilderTestModelParentStub();