在Laravel中,我们可以使用"has"方法来检查模型是否具有某个关联关系,而"doesntHave"则可以通过使用"whereDoesntHave"方法来实现。"whereDoesntHave"方法允许我们指定一个闭包函数,用于定义不具有某个关联关系的查询条件。 以下是一个示例代码,演示了如何在Laravel中使用"doesntHave"方法: 代码语言:txt 复制 use App\Mod...
第二个参数是当前模型类所属表的外键,在本例中是user_profiles表的user_id字段,拼接规则和hasOne那里类似,只不过这里是基于第四个参数关联关系名称$relation: 代码语言:javascript 复制 if(is_null($relation)){$relation=$this->guessBelongsToRelation();}...if(is_null($foreignKey)){$foreignKey=Str::snake...
select * from `users` where exists ( select * from `posts` where `users`.`id` = `posts`.`user_id` and `posts`.`deleted_at` is null ) and `email_verified_at` is not null 如果你想要进一步过滤发布文章数量大于 1 的用户,可以带上查询条件:Copy Highlighter-hljs$users = User::has('...
will not narrow down the results to only not deleted comments.A workaround is to explicitly filter by deleted_at field:$posts = Post::whereRelation('comments', 'comments.deleted_at', '=', null)->get();boryn changed the title Eloquent ->has() or _>whereRelation() do not respect ...
publicfunctionbelongsTo($related,$foreignKey=null,$ownerKey=null,$relation=null) 其中第一个参数是关联模型的类名。 第二个参数是当前模型类所属表的外键,在本例中是 user_profiles 表的 user_id 字段,拼接规则和 hasOne 那里类似,只不过这里是基于第四个参数关联关系名称 $relation: ...
查詢relation時針對relation實現限制條件:(has, doesnotHave) //Retrieve all posts with at least one comment containing words like foo%$posts= Post::has('comments.votes')->get();//簡化版$posts= Post::whereHas('comments',function($query) {$query->where('content', 'like', 'foo%'); ...
Instead, it will throw an Illuminate\Database\Eloquent\RelationNotFoundException. This change will only affect your application if you were manually catching the BadMethodCallException.Eloquent $morphClass PropertyThe $morphClass property that could be defined on Eloquent models has been removed in ...
$user->posts()->where('active', 1)->get();But, before diving too deep into using relationships, let's learn how to define each type.One To OneA one-to-one relationship is a very basic relation. For example, a User model might be associated with one Phone. To define this ...
User::where(); // 2. 对象调用 $flight = App\Flight::find(1); $flight->name = 'New Flight Name'; $flight->save(); $filght->delete(); Eloquent ORM既可以通过静态调用执行方法,也可以先获取到模型对象,然后执行方法。但他们实质是一样的。在Model中定义的静态方法如下: ...
我正在使用 whereRelation 但我不知道如何从基础模型中获取 where 值条件我已经尝试过这段代码:Item::with('unit','stock')->whereRelation('stock', 'stock', '<', 'items.min_stock'); 并在调试器中查询结果:select * from `items` where exists (select * from `stocks` where `items`.`id` = `...