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(...
Laravel Relationship Where Condition ExampleRead Now → ★ Laravel Eloquent Relationships Tutorial From ScratchRead Now → ★ Laravel Many to Many Eloquent Relationship TutorialRead Now → ★ Laravel Has Many Through Eloquent Relationship TutorialRead Now → ★ Laravel Where Clause with date_...
*/ public function user(): BelongsTo { return $this->belongsTo(User::class)->withDefault(function (User $user, Post $post) { $user->name = 'Guest Author'; }); }Querying Belongs To RelationshipsWhen querying for the children of a "belongs to" relationship, you may manually build the...
然后,在我们的控制器中,我们可以做这个“魔术”:$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' => $expires]);Updating A Record On A Pivot Table#If you need to update an existing row...
So in this tutorial you can understand how to create has many through relationships with migration with a foreign key schema for one to many relationships, create records, attach records, get all records, where condition and everything related to has many through relationship. In this exampl...
Sometimes you may need to eager load a relationship after the parent model has already been retrieved. For example, this may be useful if you need to dynamically decide whether to load related models:1$books = App\Book::all(); 2 3if ($someCondition) { 4 $books->load('author', '...
As you can see, even though we are eager loadingauthorsrelationship, it is still making more queries. Because we are not eager loading theteamrelationship onauthors. We can fix this by doing the following. 1$posts = Post::with(['author.team'])->get(); ...
Field TypesThis 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:Audio...
you can understand how to create many-to-many relationships with migration with a foreign key schema for one to many relationships, use sync with a pivot table, create records, attach records, get all records, delete, update, where condition and everything related to many to many relationship...