除了在查询构建器中使用distinct方法,我们还可以在Eloquent模型中使用distinct方法。下面是一个示例: 代码语言:txt 复制class User extends Model { public function scopeDistinctName($query) { return $query->distinct('name'); } } $users = User::distinctName()->get(); 在上面的示例中,我们定义了一个...
For Eloquent methods likeallandgetwhich retrieve multiple results, an instance ofIlluminate\Database\Eloquent\Collectionwill be returned. TheCollectionclass providesa variety of helpful methodsfor working with your Eloquent results. Of course, you may simply loop over this collection like an array: 因...
* Find multiple models by their primary keys. * * @param \Illuminate\Contracts\Support\Arrayable|array $ids * @param array $columns * @return \Illuminate\Database\Eloquent\Collection */ public function findMany($ids, $columns = ['*']) { if (empty($ids)) { return $this->model->newC...
orderBy()方法。尝试使用sortByDesc()代替。 或者,您可以将$products = Product::all();更改为$products = new Product();
5use Illuminate\Database\Eloquent\Model; 6 7class Flight extends Model 8{ 9 /** 10 * The connection name for the model. 11 * 12 * @var string 13 */ 14 protected $connection = 'connection-name'; 15}Retrieving Multiple ModelsOnce...
For Eloquent methods like all and get which retrieve multiple results, an instance of Illuminate\Database\Eloquent\Collection will be returned. The Collection class provides a variety of helpful methods for working with your Eloquent results. Of course, you may simply loop over this collection like...
Eloquent: 入门简介Laravel 包含了 Eloquent,这是一个对象关系映射器(ORM),使与数据库的交互变得很愉快。使用 Eloquent 时,每个数据库表都有一个对应的「模型」,用于与该表进行交互。除了从数据库表中检索记录外,Eloquent 模型还允许您从表中插入,更新和删除记录。提示...
当我试图求和超过1个“价格”列数据时遇到问题,这些数据已经被一个或多个条件过滤。我已经成功地用多个条件过滤了数据并成功地列出了它。但当我尝试对“价格”求和时,过滤器仍然正常工作并列出了数据,但不会返回“价格”列的总和数据。 从网上我得到了总结的信息,专栏如下 ...
Of course, as you can see, you can join to multiple tables in a single query:$users = DB::table('users') ->join('contacts', 'users.id', '=', 'contacts.user_id') ->join('orders', 'users.id', '=', 'orders.user_id') ->select('users.*', 'contacts.phone', 'orders.price...
->orderBy('name', 'desc') ->take(10) ->get(); Collections 集合 For Eloquent methods like all and get which retrieve multiple results, an instance of Illuminate\Database\Eloquent\Collection will be returned. The Collection class provides a variety of helpful methods for working with your Elo...