From 989b15cdfd9f6bfb72a6bbc2fd847a22037a8c87 Mon Sep 17 00:00:00 2001 From: pengshiyu <1940607002@qq.com> Date: Fri, 15 Jul 2022 10:23:23 +0800 Subject: [PATCH] fix --- blog/laravel/debugbar.md | 3 + blog/laravel/index.md | 7 + blog/laravel/model-relation-query.md | 2 - blog/laravel/model-relation-write.md | 358 +++++++++++++++++++++++++++ 4 files changed, 368 insertions(+), 2 deletions(-) create mode 100644 blog/laravel/model-relation-write.md diff --git a/blog/laravel/debugbar.md b/blog/laravel/debugbar.md index fe3ae14..d790940 100644 --- a/blog/laravel/debugbar.md +++ b/blog/laravel/debugbar.md @@ -7,10 +7,13 @@ composer8 require barryvdh/laravel-debugbar ``` 生成一个配置文件 + ```bash php8 artisan vendor:publish --provider="Barryvdh\Debugbar\ServiceProvider" ``` +需要配合view模板使用 + 页面底部的调试工具 ```php diff --git a/blog/laravel/index.md b/blog/laravel/index.md index 1f9bc58..39ef81c 100644 --- a/blog/laravel/index.md +++ b/blog/laravel/index.md @@ -42,4 +42,11 @@ dev: [模型的关联查询](/blog/laravel/model-relation-query.md) +[Debugbar 调试器](/blog/laravel/debugbar.md) + [模型的预加载](/blog/laravel/model-preload.md) + +[模型的关联写入](/blog/laravel/model-relation-write.md) + + +https://www.bilibili.com/video/BV1gE411j78F?p=32&spm_id_from=pageDriver&vd_source=efbb4dc944fa761b6e016ce2ca5933da \ No newline at end of file diff --git a/blog/laravel/model-relation-query.md b/blog/laravel/model-relation-query.md index 93f7985..96e7539 100644 --- a/blog/laravel/model-relation-query.md +++ b/blog/laravel/model-relation-query.md @@ -157,5 +157,3 @@ select `user`.*, (select count(*) from `book` where `user`.`id` = `book`.`user_id` and `user_id` = ?) as `books_count` from `user` ``` - -https://www.bilibili.com/video/BV1gE411j78F?p=29&spm_id_from=pageDriver&vd_source=efbb4dc944fa761b6e016ce2ca5933da \ No newline at end of file diff --git a/blog/laravel/model-relation-write.md b/blog/laravel/model-relation-write.md new file mode 100644 index 0000000..929143d --- /dev/null +++ b/blog/laravel/model-relation-write.md @@ -0,0 +1,358 @@ +# 模型的关联写入 + +模型 + +```php +class User extends Model +{ + protected $table = 'user'; + // 一对多关联 Book 表 + public function books() + { + return $this->hasMany(Book::class, 'user_id', 'id'); + } +} + + +class Book extends Model +{ + protected $table = 'book'; + + // 取消批量赋值限制 + protected $guarded = []; + + // 取消自动时间字段 + // public $timestamps = false; + + // 时间字段 + public const CREATED_AT = 'create_time'; + public const UPDATED_AT = 'update_time'; + + // 反向关联 + public function user() + { + return $this->belongsTo(User::class, 'user_id', 'id'); + } +} + +``` + +## 关联写入 + +```php +//先限定用户 +$user = User::find(1); +//给这个用户关联的 book 新增一条记录 +//user_id 会自动写入 19，title 自定义 + +$user->books()->save(new Book(['title'=>'《哈利波特》'])); +``` + +```sql +select * from `user` where `user`.`id` = ? limit 1 + +insert into `book` (`title`, `user_id`, `update_time`, `create_time`) values (?, ?, ?, ?) +``` + + +## 批量新增 + +```php +$user = User::find(1); + +$user->books()->saveMany([ + new Book(['title' => '《哈利波特》']), + new Book(['title' => '《指环王》']) +]); +``` + +```sql +select * from `user` where `user`.`id` = ? limit 1 +-- [1] + +insert into `book` (`title`, `user_id`, `update_time`, `create_time`) values (?, ?, ?, ?) +-- ["《哈利波特》",1,"2022-07-15 09:44:17","2022-07-15 09:44:17"] + +insert into `book` (`title`, `user_id`, `update_time`, `create_time`) values (?, ?, ?, ?) +-- ["《指环王》",1,"2022-07-15 09:44:17","2022-07-15 09:44:17"] +``` + +## 插入数组新增 + +```php +$user = User::find(1); + +$user->books()->create([ 'title' => '《哈利波特》']); + +``` +```sql +select * from `user` where `user`.`id` = ? limit 1 +-- params: [1] + +insert into `book` (`title`, `user_id`, `update_time`, `create_time`) values (?, ?, ?, ?) +-- params: ["《哈利波特》",1,"2022-07-15 09:48:14","2022-07-15 09:48:14"] +``` + +## 批量插入数组 + +```php +$user = User::find(1); + +$user->books()->createMany([ + ['title' => '《哈利波特》'], + ['title' => '《指环王》'] +]); +``` + +```sql +select * from `user` where `user`.`id` = ? limit 1 +-- [1] + +insert into `book` (`title`, `user_id`, `update_time`, `create_time`) values (?, ?, ?, ?) +-- ["《哈利波特》",1,"2022-07-15 09:49:56","2022-07-15 09:49:56"] + +insert into `book` (`title`, `user_id`, `update_time`, `create_time`) values (?, ?, ?, ?) +-- ["《指环王》",1,"2022-07-15 09:49:56","2022-07-15 09:49:56"] +``` + +PS:还有 findOrNew、firstOrNew、firstOrCreate 和 updateOrCreate 方法 + +> 区别： +- new 没有保存到数据库，没有id +- create 会保存到数据库，有id + +## findOrNew + +```php +$user = User::find(1); + +return $user->books()->findOrNew(20); +``` + +```json +{ + "user_id": 1 +} +``` + +```sql +select * from `user` where `user`.`id` = ? limit 1 +-- [1] + +select * from `book` where `book`.`user_id` = ? and `book`.`user_id` is not null and `book`.`id` = ? limit 1 +-- [1,20] +``` + +## firstOrNew + +```php +$user = User::find(1); + +return $user->books()->firstOrNew([ + 'title' => '《哈利波特》' +]); +``` + +```json +{ + "id": 3, + "user_id": 1, + "title": "《哈利波特》", + "create_time": "2022-07-15T01:43:21.000000Z", + "update_time": "2022-07-15T01:43:21.000000Z", + "delete_time": null +} +``` + + +```sql +select * from `user` where `user`.`id` = ? limit 1 +-- [1] + +select * from `book` where `book`.`user_id` = ? and `book`.`user_id` is not null and (`title` = ?) limit 1 +-- [1,"《哈利波特》"] +``` + +## firstOrCreate + +```php +$user = User::find(1); + +return $user->books()->firstOrCreate([ + 'title' => '《西游记》' +]); +``` + +```json +{ + "title": "《西游记》", + "user_id": 1, + "update_time": "2022-07-15T01:56:00.000000Z", + "create_time": "2022-07-15T01:56:00.000000Z", + "id": 9 +} +``` + +```sql +select * from `user` where `user`.`id` = ? limit 1 +-- [1] + +select * from `book` where `book`.`user_id` = ? and `book`.`user_id` is not null and (`title` = ?) limit 1 +-- [1,"《西游记》"] + +insert into `book` (`title`, `user_id`, `update_time`, `create_time`) values (?, ?, ?, ?) +-- ["《西游记》",1,"2022-07-15 09:56:00","2022-07-15 09:56:00"] +``` + +## updateOrCreate + +```php +$user = User::find(1); + +return $user->books()->updateOrCreate([ + 'title' => '《水浒传》' +], [ + 'delete_time' => '2022-07-15 10:00:13' +]); +``` + +```json +{ + "id": 10, + "user_id": 1, + "title": "《水浒传》", + "create_time": "2022-07-15T02:00:13.000000Z", + "update_time": "2022-07-15T02:05:02.000000Z", + "delete_time": "2022-07-15 10:00:13" +} +``` +```sql +select * from `user` where `user`.`id` = ? limit 1 +-- [1] + +select * from `book` where `book`.`user_id` = ? and `book`.`user_id` is not null and (`title` = ?) limit 1 +-- [1,"《水浒传》"] + +update `book` set `delete_time` = ?, `book`.`update_time` = ? where `id` = ? +-- ["2022-07-15 10:00:13","2022-07-15 10:05:02",10] +``` + +## 关联删除 + +```php +// 删除 user_id=19 的书 +$user = User::find(99); +$user->books()->delete(); +``` + +```sql +select * from `user` where `user`.`id` = ? limit 1 +-- [1] + +delete from `book` where `book`.`user_id` = ? and `book`.`user_id` is not null +-- [1] +``` + +## 关联修改 + +```php +// 修改 user_id=19 的书 +$user = User::find(1); +$user->books()->update(['title'=> '《修改书籍》']) +``` + +```sql +select * from `user` where `user`.`id` = ? limit 1 +-- [1] + +update `book` set `title` = ?, `book`.`update_time` = ? where `book`.`user_id` = ? and `book`.`user_id` is not null +-- ["《修改书籍》","2022-07-15 10:09:08",1] +``` + +## 修改关联的外键 + +```php +// 修改掉书籍关联的用户，即:user_id 修改，换用户 +$user = User::find(2); + +$book = Book::find(1); +$book->user()->associate($user); +$book->save(); + +``` +```sql +select * from `user` where `user`.`id` = ? limit 1 +-- [2] + +select * from `book` where `book`.`id` = ? limit 1 +-- [1] + +update `book` set `user_id` = ?, `book`.`update_time` = ? where `id` = ? +-- [2,"2022-07-15 10:11:31",1] + +``` + +```php +// PS:如果想取消一本书的拥有者， +// 比如将 user_id 设置为 null，字段要设置可以 null; +$book = Book::find(1); +$book->user()->dissociate(); +$book->save(); +``` + +```sql +select * from `book` where `book`.`id` = ? limit 1 +-- [1] + +update `book` set `user_id` = ?, `book`.`update_time` = ? where `id` = ? +-- [null,"2022-07-15 10:13:34",1] +``` + + +## 默认模型 + +搜索书籍的对应用户的时候，空null字段会导致用户出现null数据 + +采用空对象默认模型的方式，去解决这个问题 + +```php +//Book.php +public function user() +{ + return $this->belongsTo(User::class, 'user_id', 'id') + ->withDefault([ + 'id' => 0, + 'name' => '游客用户' + ]); +} +``` + +```php +$book = Book::find(1); +$book->load(['user']); + +return $book; +``` + +```json +{ + "id": 1, + "user_id": null, + "title": "《三国演义》", + "create_time": "2022-07-15T02:10:44.000000Z", + "update_time": "2022-07-15T02:13:34.000000Z", + "delete_time": null, + "user": { + "id": 0, + "name": "游客用户" + } +} +``` + +```sql +select * from `book` where `book`.`id` = ? limit 1 +-- [1] + +select * from `user` where 0 = 1 +-- [] +``` \ No newline at end of file -- GitLab