From 6821839b1f279de5f8ab40cc2ffa5c52d37f8c13 Mon Sep 17 00:00:00 2001 From: pengshiyu <1940607002@qq.com> Date: Mon, 11 Jul 2022 10:52:49 +0800 Subject: [PATCH] fix --- blog/laravel/model-relation.md | 356 ++++++++++++++++++++++++++++++++- 1 file changed, 349 insertions(+), 7 deletions(-) diff --git a/blog/laravel/model-relation.md b/blog/laravel/model-relation.md index bb7b2cc..a5bb932 100644 --- a/blog/laravel/model-relation.md +++ b/blog/laravel/model-relation.md @@ -35,12 +35,16 @@ CREATE TABLE `profile` ( 初始化数据 ```sql -- 用户表 -INSERT INTO `user`(`id`, `name`, `age`, `create_time`, `update_time`, `delete_time`) VALUES (1, '曹真', 23, '2022-07-05 10:32:48', '2022-07-05 10:47:36', NULL); -INSERT INTO `user`(`id`, `name`, `age`, `create_time`, `update_time`, `delete_time`) VALUES (2, '曹丕', 21, '2022-07-05 10:36:47', '2022-07-05 10:47:22', NULL); +INSERT INTO `user`(`id`, `name`, `age`, `create_time`, `update_time`, `delete_time`) +VALUES (1, '曹真', 23, '2022-07-05 10:32:48', '2022-07-05 10:47:36', NULL); +INSERT INTO `user`(`id`, `name`, `age`, `create_time`, `update_time`, `delete_time`) +VALUES (2, '曹丕', 21, '2022-07-05 10:36:47', '2022-07-05 10:47:22', NULL); -- 用户信息表 -INSERT INTO `profile`(`id`, `user_id`, `hobby`, `create_time`, `update_time`, `delete_time`) VALUES (1, 1, '羽毛球', '2022-07-10 22:26:00', '2022-07-10 22:27:07', NULL); -INSERT INTO `profile`(`id`, `user_id`, `hobby`, `create_time`, `update_time`, `delete_time`) VALUES (2, 2, '乒乓球', '2022-07-10 22:27:16', '2022-07-10 22:27:16', NULL); +INSERT INTO `profile`(`id`, `user_id`, `hobby`, `create_time`, `update_time`, `delete_time`) +VALUES (1, 1, '羽毛球', '2022-07-10 22:26:00', '2022-07-10 22:27:07', NULL); +INSERT INTO `profile`(`id`, `user_id`, `hobby`, `create_time`, `update_time`, `delete_time`) +VALUES (2, 2, '乒乓球', '2022-07-10 22:27:16', '2022-07-10 22:27:16', NULL); ``` 创建Model @@ -52,7 +56,7 @@ php8 artisan make:model User # 用户信息表 php8 artisan make:model Profile -# 添加代码提示 +# 添加代码提示，模型修改后也可以执行从而更新注释 php8 artisan ide-helper:models ``` @@ -139,6 +143,9 @@ class Profile extends Model ```php User::find(1)->profile; +// select * from `user` where `user`.`id` = ? limit 1 +// select * from `profile` where `profile`.`user_id` = ? and `profile`.`user_id` is not null limit 1 + { "id": 1, "user_id": 1, @@ -152,6 +159,9 @@ User::find(1)->profile; ```php Profile::find(1)->user; +// select * from `profile` where `profile`.`id` = ? limit 1 +// select * from `user` where `user`.`id` = ? limit 1 + { "id": 1, "name": "曹真", @@ -182,8 +192,10 @@ CREATE TABLE `book` ( ) ENGINE=InnoDB COMMENT='用户书单表'; -- 用户书单表 -INSERT INTO `book`(`id`, `user_id`, `title`, `create_time`, `update_time`, `delete_time`) VALUES (1, 1, '《三国演义》', '2022-07-10 22:26:00', '2022-07-10 22:27:07', NULL); -INSERT INTO `book`(`id`, `user_id`, `title`, `create_time`, `update_time`, `delete_time`) VALUES (2, 1, '《红楼梦》', '2022-07-10 22:27:16', '2022-07-10 22:27:16', NULL); +INSERT INTO `book`(`id`, `user_id`, `title`, `create_time`, `update_time`, `delete_time`) +VALUES (1, 1, '《三国演义》', '2022-07-10 22:26:00', '2022-07-10 22:27:07', NULL); +INSERT INTO `book`(`id`, `user_id`, `title`, `create_time`, `update_time`, `delete_time`) +VALUES (2, 1, '《红楼梦》', '2022-07-10 22:27:16', '2022-07-10 22:27:16', NULL); ``` 初始化数据 @@ -227,6 +239,9 @@ class Book extends Model ```php User::find(1)->books; +// select * from `user` where `user`.`id` = ? limit 1 +// select * from `book` where `book`.`user_id` = ? and `book`.`user_id` is not null + [ { "id": 1, @@ -251,6 +266,10 @@ User::find(1)->books; ```php Book::find(1)->user; +// select * from `book` where `book`.`id` = ? limit 1 + +// select * from `user` where `user`.`id` = ? limit 1 + { "id": 1, "name": "曹真", @@ -260,12 +279,18 @@ Book::find(1)->user; "delete_time": null } ``` + 使用条件查询 + ```php User::find(1) ->books() ->where('id', '>', 1) ->get(); +// select * from `user` where `user`.`id` = ? limit 1 + +// select * from `book` where `book`.`user_id` = ? +// and `book`.`user_id` is not null and `id` > ? [ { @@ -280,4 +305,321 @@ User::find(1) ``` +## 模型的多对多关联 + +定义数据表 + +```sql +-- 角色表 +CREATE TABLE `role` ( + `id` int NOT NULL AUTO_INCREMENT, + + `title` varchar(255) NOT NULL DEFAULT '', + + `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP, + `update_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, + `delete_time` datetime DEFAULT NULL, + PRIMARY KEY (`id`) +) ENGINE=InnoDB COMMENT='角色表'; + +-- 用户角色关系表 +CREATE TABLE `user_role` ( + `id` int NOT NULL AUTO_INCREMENT, + + `user_id` int NOT NULL, + `role_id` int NOT NULL, + `detail` varchar(255) NOT NULL DEFAULT '', + + `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP, + `update_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, + `delete_time` datetime DEFAULT NULL, + PRIMARY KEY (`id`) +) ENGINE=InnoDB COMMENT='用户角色关系表'; +``` + +初始化数据 + +```sql +-- 角色表 +INSERT INTO `role`(`id`, `title`, `create_time`, `update_time`, `delete_time`) +VALUES (1, '评论审核员', '2022-07-11 10:10:20', '2022-07-11 10:10:54', NULL); +INSERT INTO `role`(`id`, `title`, `create_time`, `update_time`, `delete_time`) +VALUES (2, '账号管理员', '2022-07-11 10:10:26', '2022-07-11 10:10:47', NULL); + +-- 用户角色关系表 +INSERT INTO `user_role`(`id`, `user_id`, `role_id`, `detail`, `create_time`, `update_time`, `delete_time`) +VALUES (1, 1, 1, '备注详情1', '2022-07-11 10:11:04', '2022-07-11 10:12:56', NULL); +INSERT INTO `user_role`(`id`, `user_id`, `role_id`, `detail`, `create_time`, `update_time`, `delete_time`) +VALUES (2, 1, 2, '备注详情2', '2022-07-11 10:11:08', '2022-07-11 10:12:54', NULL); +``` + +生成模型类 + +```bash +# 角色表 +php8 artisan make:model Role + +# 添加代码提示 +php8 artisan ide-helper:models +``` + +修改模型类 + +```php +class User extends Model +{ + protected $table = 'user'; + + // 多对多关联 + public function roles() + { + return $this->belongsToMany(Role::class, 'user_role', 'user_id', 'role_id'); + } +} + + +class Role extends Model +{ + protected $table = 'role'; + + // 多对多关联 + public function users() + { + return $this->belongsToMany(User::class, 'user_role', 'role_id', 'user_id'); + } +} + +``` + +查询示例 + +示例1 + +```php +User::find(1)->roles; +``` + +```sql +select * from `user` where `user`.`id` = ? limit 1 + +select `role`.*, + `user_role`.`user_id` as `pivot_user_id`, + `user_role`.`role_id` as `pivot_role_id` +from `role` +inner join `user_role` +on `role`.`id` = `user_role`.`role_id` +where `user_role`.`user_id` = ? + +``` + +```json +[ + { + "id": 1, + "title": "评论审核员", + "create_time": "2022-07-11 10:10:20", + "update_time": "2022-07-11 10:10:54", + "delete_time": null, + "pivot": { + "user_id": 1, + "role_id": 1 + } + }, + { + "id": 2, + "title": "账号管理员", + "create_time": "2022-07-11 10:10:26", + "update_time": "2022-07-11 10:10:47", + "delete_time": null, + "pivot": { + "user_id": 1, + "role_id": 2 + } + } +] +``` + +示例2 + +```php +User::find(1) + ->roles() + ->where('role_id', 1) + ->get(); +``` + +```sql +select * from `user` where `user`.`id` = ? limit 1 + +select `role`.*, + `user_role`.`user_id` as `pivot_user_id`, + `user_role`.`role_id` as `pivot_role_id` +from `role` +inner join `user_role` +on `role`.`id` = `user_role`.`role_id` +where `user_role`.`user_id` = ? and `role_id` = ? +``` + +```json +[ + { + "id": 1, + "title": "评论审核员", + "create_time": "2022-07-11 10:10:20", + "update_time": "2022-07-11 10:10:54", + "delete_time": null, + "pivot": { + "user_id": 1, + "role_id": 1 + } + } +] +``` + +示例3 + +```php +Role::find(1)->users; +``` + +```sql +select * from `role` where `role`.`id` = ? limit 1 + +select `user`.*, + `user_role`.`role_id` as `pivot_role_id`, + `user_role`.`user_id` as `pivot_user_id` +from `user` +inner join `user_role` +on `user`.`id` = `user_role`.`user_id` +where `user_role`.`role_id` = ? +``` + +```json +[ + { + "id": 1, + "name": "曹真", + "age": 23, + "create_time": "2022-07-05 10:32:48", + "update_time": "2022-07-05 10:47:36", + "delete_time": null, + "pivot": { + "role_id": 1, + "user_id": 1 + } + } +] +``` + +示例4：获取中间表字段 + +```php +public function roles() +{ + return $this->belongsToMany(Role::class, 'user_role', 'user_id', 'role_id') + ->withPivot('id', 'detail'); +} +``` + +```php +User::find(1)->roles; +``` + +```sql +select * from `user` where `user`.`id` = ? limit 1 + +select `role`.*, + `user_role`.`user_id` as `pivot_user_id`, + `user_role`.`role_id` as `pivot_role_id`, + `user_role`.`id` as `pivot_id`, + `user_role`.`detail` as `pivot_detail` +from `role` +inner join `user_role` +on `role`.`id` = `user_role`.`role_id` +where `user_role`.`user_id` = ? +``` + +```json +[ + { + "id": 1, + "title": "评论审核员", + "create_time": "2022-07-11 10:10:20", + "update_time": "2022-07-11 10:10:54", + "delete_time": null, + "pivot": { + "user_id": 1, + "role_id": 1, + "id": 1, + "detail": "备注详情1" + } + }, + { + "id": 2, + "title": "账号管理员", + "create_time": "2022-07-11 10:10:26", + "update_time": "2022-07-11 10:10:47", + "delete_time": null, + "pivot": { + "user_id": 1, + "role_id": 2, + "id": 2, + "detail": "备注详情2" + } + } +] + +``` + +示例5：筛选数据 + +```php +public function roles() +{ + return $this->belongsToMany(Role::class, 'user_role', 'user_id', 'role_id') + ->wherePivot('id', 1); +} +``` + +```php +User::find(1)->roles; +``` + +```sql +select * from `user` where `user`.`id` = ? limit 1 + +select `role`.*, + `user_role`.`user_id` as `pivot_user_id`, + `user_role`.`role_id` as `pivot_role_id` +from `role` +inner join `user_role` +on `role`.`id` = `user_role`.`role_id` +where `user_role`.`user_id` = ? and `user_role`.`id` = ? +``` + +```json +[ + { + "id": 1, + "title": "评论审核员", + "create_time": "2022-07-11 10:10:20", + "update_time": "2022-07-11 10:10:54", + "delete_time": null, + "pivot": { + "user_id": 1, + "role_id": 1 + } + } +] +``` + +## 其他关联关系 + +- 远程一对一 +- 远程一对多 +- 多态一对一 +- 多态一对多 +- 多态多对多 + + https://www.bilibili.com/video/BV1gE411j78F?p=27&spm_id_from=pageDriver&vd_source=efbb4dc944fa761b6e016ce2ca5933da \ No newline at end of file -- GitLab