Relationship with conditions and ordering public function orders() { return $this->hasMany('App\Order'); } 其实我们可以在获取多订单的同时,加入筛选语句和排序。如,获取已支付并按更新时间倒序输出: public function paidOrders() { return $this->hasMany('App\Order')->where('paid', 1)->orderBy(...
When working with a many-to-many relationship, the save method accepts an array of additional intermediate table attributes as its second argument:App\User::find(1)->roles()->save($role, ['expires' => $expires]);Updating A Record On A Pivot TableIf you need to update an existing row ...
*/ public function user(): BelongsTo { return $this->belongsTo(User::class)->withDefault(function (User $user, Post $post) { $user->name = 'Guest Author'; }); }Querying Belongs To RelationshipsWhen querying for the children of a "belongs to" relationship, you may manually build the...
This portion of the documentation only discusses non-relationship fields. To learn more about relationship fields, check out their documentation.Nova ships with a variety of field types. So, let’s explore all of the available types and their options:...
然后,在我们的控制器中,我们可以做这个“魔术”:$users=Topic::with('latestPost')->get()->sortByDesc('latestPost.created_at');9.Eloquent::when()——不再有if-else我们中的许多人使用“if-else”编写条件查询,如下所示:if(request('filter_by') =='likes') {$query->where('likes','>',reques...
When working with a many-to-many relationship, the save method accepts an array of additional intermediate table attributes as its second argument:App\User::find(1)->roles()->save($role, ['expires' => $expires]);Updating A Record On A Pivot Table#If you need to update an existing row...
Sometimes you may need to eager load a relationship after the parent model has already been retrieved. For example, this may be useful if you need to dynamically decide whether to load related models:1$books = App\Book::all(); 2 3if ($someCondition) { 4 $books->load('author', '...
When using a custom keyed implicit binding as a nested route parameter, Laravel will automatically scope the query to retrieve the nested model by its parent using conventions to guess the relationship name on the parent. In this case, it will be assumed that the User model has a relationship...
Controller Code: Read Also:Laravel Check If Relationship Data is Empty Example <?php namespace App\Http\Controllers; use Illuminate\Http\Request; use App\Models\User; class UserController extends Controller { /** * Write code on Method
As you can see, even though we are eager loadingauthorsrelationship, it is still making more queries. Because we are not eager loading theteamrelationship onauthors. We can fix this by doing the following. 1$posts = Post::with(['author.team'])->get(); ...