Where 是一个约束声明，使用Where约束来自数据库的数据，Where是在结果返回之前起作用的，Where中不能使用...
1 I seen this answer to a similar question here on StackOverflow:https://stackoverflow.com/a/40654005/1055279 Here I see publicfunctionorder(){return$this->belongsToMany('Order')->withTrashed(); } In my scenario I'veCustomermodels that havenDevices ...
but it doesn't seem very efficient to send so many queries to the server. What is the best way to perform awherethrough a model relationship using Laravel 5 and Eloquent? ('participants', function ( @Cermbo's answer is not related to this question. In that answer,Laravelwill give you ...
另外,上面也已经提到由于relationship本身就是query builder因此可以增加约束级联,比如: Post::find(1)->comments()->where('title','foo')->first()就只取title为foo的第一条post对应的comment other_local_postid_key就是 注意按照laravel默认命名规约,一对多的关系模型,child model中的owning model many 2 many...
Descendants are all categories in a sub tree, i.e. children of category, children of children, etc.// #1 Using relationship $result = $category->descendants; // #2 Using a query $result = $category->descendants()->get(); // #3 Getting descendants by primary key $result = app('rin...
You may query the posts relationship and add additional constraints to the relationship like so:$user = App\User::find(1); $user->posts()->where('active', 1)->get();Note that you are able to use any of the query builder methods on the relationship!
根据文档(https://laravel.com/docs/8.x/eloquent-relationships#constraining-eager-loads)，这是可能的...
You can also filter the results returned by belongsToMany using the wherePivot, wherePivotIn, and wherePivotNotIn methods when defining the relationship:return $this->belongsToMany('App\Role')->wherePivot('approved', 1); return $this->belongsToMany('App\Role')->wherePivotIn('priority', ...
有一个解决方案应该适合这种情况：我认为这行代码的周点是：
Ok, so for the example in the README the Message model would have a relation named something like participants, that returns a query with ->whereIn('id', [$sender, $receiver])? Maybe something like this: public function participants(): BelongsToMerged { return $this->belongsToMerged(User...