I was wondering how I could load all models of a type where a specific conditions is met. Lets take the following example setup. I have 2 eloquent models,HouseandRental. AHousehas ahasManyrelationship to theRental. public function rentals() { return $this->hasMany(Rental::class); } The...
This means the relationship data is not actually loaded until you first access the property. However, Eloquent can "eager load" relationships at the time you query the parent model. Eager loading alleviates the N + 1 query problem. To illustrate the N + 1 query problem, consider a Book ...
Sometimes you may wish to eager load a relationship, but also specify a condition for the eager load. Here's an example:$users = User::with(['posts' => function($query) { $query->where('title', 'like', '%first%'); }])->get();...
If you wanted to count only the posts with a specific condition, say, titles starting with "Hello":$users = User::withCount(['posts' => function($query) { $query->where('title', 'like', 'Hello%'); }])->get(); Example-4: Ordering Results Based on Relationship Count...
By default, Laravel will determine the relationship associated with the given model based on the class name of the model; however, you may specify the relationship name manually by providing it as the second argument to the whereBelongsTo method:...
Laravel MongoDB Lookup with Condition: Fetch employee list along with number of task completed by each employee Ask Question Asked 7 months ago Modified 7 months ago Viewed 20 times 0 I am using Laravel MongoDB library (formerly know as Laravel Jenssegers MongoDB library). ...
我认为这是正确的方法：
The whenLoaded method may be used to conditionally load a relationship. In order to avoid unnecessarily loading relationships, this method accepts the name of the relationship instead of the relationship itself:/** * Transform the resource into an array. * * @param \Illuminate\Http\Request * @...
$books = App\Book::all(); if ($someCondition) { $books->load('author', 'publisher'); }如果你想设置预加载查询的额外条件,则可以传递一个键值为你想要的关联的数组至 load 方法。这个数组的值应是用于接收查询 闭包 实例:$books->load(['author' => function ($query) { $query->orderBy('...
To avoid this, eager load the author's relationship on posts as below. 1$posts = Post::all(); // Avoid doing this 2$posts = Post::with(['author'])->get(); // Do this instead Executing the above code will result in running the following queries. ...