2. relationship和model本身都是以query builder作为基类的,因此对relation的操作也可以使用类似query builder的方法,比如:可以支持级联; 3.Dynamic property of model:这是 model->relation方式引用的结果,这种方式直接返回relation model的value,不支持query builder的级联操作,这是和model->relation()方法调用的本质区别。
大概有这些东西： Gates 和 Policies $this->authorize() 方法 @can 和 @cannot Blade 命令 有人可能...
Rache1 未填写
Currently, the new MariaDB driver behaves like the current MySQL driver with one exception: theuuidschema builder method creates native UUID columns instead ofchar(36)columns. If your existing migrations utilize theuuidschema builder method and you choose to use the newmariadbdatabase driver, you ...
You may query the posts relationship and add additional constraints to the relationship like so:1$user = App\User::find(1); 2 3$user->posts()->where('active', 1)->get();You are able to use any of the query builder methods on the relationship, so be sure to explore the query ...
You may query the posts relationship and add additional constraints to the relationship like so:1$user = App\User::find(1); 2 3$user->posts()->where('active', 1)->get();You are able to use any of the query builder methods on the relationship, so be sure to explore the query ...
$users= QueryBuilder::for(User::class) ->allowedIncludes('posts') ->get();// all `User`s with their `posts` loaded Read more about include features like: including nested relationships, including relationship count, custom includes, ... ...
You may also use the count, sum, max, and other aggregate methods provided by the query builder. These methods return the appropriate scalar value instead of a full model instance: 可以使用count、sum、max和其他的聚合方法 $count = App\Flight::where('active', 1)->count(); ...
最好倾向于使用 Eloquent 而不是 Query Builder 和原生的 SQL 查询。要优先于数组的集合 Eloquent 可以编写可读和可维护的代码。此外,Eloquent 也拥有很棒的内置工具,比如软删除、事件、范围等。 比如你这样写: SELECT * FROM`articles`WHERE EXISTS (SELECT * ...
public function __construct(Builder $query, Model $parent, $foreignKey, $localKey) { $this->localKey = $localKey; $this->foreignKey = $foreignKey; parent::__construct($query, $parent); } //为关联关系设置约束 子模型的foreign key等于父模型的 上面设置的$localKey字段的值 ...