在 Yii 2.0 中，一张关联表中的一个字段分别被两张表同时关联的实现
1、栏目配置：pa_config_column，如图1
图1
2、栏目人员配置：pa_config_column_user，如图2
图2
3、选题：pa_plan，如图3
图3
4、选题任务：pa_plan_task，如图4
图4
5、任务管理 – 我的任务，查询规则
(1)任务的租户ID为当前登录用户的租户ID；
(2)栏目配置未删除；
(3)选题未删除；
(4)选题任务未删除；
(5)选题任务的执行用户ID(`pa_plan_task`.`exec_user_id`)为当前登录用户ID && 栏目人员配置未删除 || 选题创建用户ID(`pa_plan`.`create_user_id`)为当前登录用户ID && 栏目人员配置未删除 || (栏目人员配置租户ID为当前登录用户租户ID && 栏目人员配置角色标识包含栏目负责人标识 && && 栏目人员配置未删除)；
6、现在的查询规则，需求在于，主表为 选题任务：pa_plan_task，其需要关联表 选题：pa_plan；选题任务：pa_plan_task 需要关联表 栏目人员配置：pa_config_column_user，基于 `pa_plan_task`.`exec_user_id`；选题：pa_plan 需要关联表 栏目人员配置：pa_config_column_user，基于 `pa_plan`.`create_user_id`
7、\common\logics\PlanTask.php，声明关联关系
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | public function getConfigColumn(){ return $this->hasOne(ConfigColumn::className(), [ 'id' => 'config_column_id' ]);}public function getPlanById(){ return $this->hasOne(Plan::className(), [ 'id' => 'plan_id' ]);}public function getConfigColumnUser(){ return $this->hasOne(ConfigColumnUser::className(), [ 'config_column_id' => 'config_column_id', 'user_id' => 'exec_user_id' ]);} |
8、\common\logics\Plan.php，声明关联关系
1 2 3 4 5 6 7 8 9 | public function getConfigColumn(){ return $this->hasOne(ConfigColumn::className(), [ 'id' => 'config_column_id' ]);}public function getConfigColumnUser(){ return $this->hasOne(ConfigColumnUser::className(), [ 'config_column_id' => 'config_column_id', 'user_id' => 'create_user_id' ]);} |
9、查询代码最终如下，如果一张关联表中的一个字段分别被两张表同时关联，需要设置关联表的别名
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | $query = $modelClass::find() ->joinWith('configColumn') ->joinWith(['configColumnUser ccue']) ->joinWith(['planById' => function($q) { $q->joinWith('configColumnUser ccuc'); }]) ->where([ 'and', [$modelClass::tableName() . '.group_id' => $identity->group_id], [ConfigColumn::tableName() . '.is_deleted' => ConfigColumn::IS_DELETED_NO], [Plan::tableName() . '.is_deleted' => Plan::IS_DELETED_NO], [$modelClass::tableName() . '.is_deleted' => $modelClass::IS_DELETED_NO] ]) ->andWhere([ 'or', [ 'and', [$modelClass::tableName() . '.exec_user_id' => $identity->id], ['ccue.is_deleted' => ConfigColumnUser::IS_DELETED_NO] ], [ 'and', [Plan::tableName() . '.create_user_id' => $identity->id], ['ccuc.is_deleted' => ConfigColumnUser::IS_DELETED_NO] ], [ 'in', Plan::tableName() . '.config_column_id', $configColumnIds ] ]) ->orderBy([$modelClass::tableName() . '.sort_order' => SORT_ASC, $modelClass::tableName() . '.id' => SORT_DESC]); |
10、最终生成的 SQL 语句如下：
1 | SELECT `pa_plan_task`.* FROM `pa_plan_task` LEFT JOIN `pa_config_column` ON `pa_plan_task`.`config_column_id` = `pa_config_column`.`id` LEFT JOIN `pa_config_column_user` `ccue` ON `pa_plan_task`.`config_column_id` = `ccue`.`config_column_id` AND `pa_plan_task`.`exec_user_id` = `ccue`.`user_id` LEFT JOIN `pa_plan` ON `pa_plan_task`.`plan_id` = `pa_plan`.`id` LEFT JOIN `pa_config_column_user` `ccuc` ON `pa_plan`.`config_column_id` = `ccuc`.`config_column_id` AND `pa_plan`.`create_user_id` = `ccuc`.`user_id` WHERE (`pa_plan_task`.`group_id`='015ce30b116ce86058fa6ab4fea4ac63') AND (`pa_config_column`.`is_deleted`=0) AND (`pa_plan`.`is_deleted`=0) AND (`pa_plan_task`.`is_deleted`=0) AND (((`pa_plan_task`.`exec_user_id`='8') AND (`ccue`.`is_deleted`=0)) OR ((`pa_plan`.`create_user_id`='8') AND (`ccuc`.`is_deleted`=0)) OR (`pa_plan`.`config_column_id`=1)) ORDER BY `pa_plan_task`.`sort_order`, `pa_plan_task`.`id` DESC LIMIT 10 |
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