Route::get('model/test/collection',function(){$where=[];if(request()->name){$where[]=['name','like','%'.request()->name.'%'];}if(request()->sex){$where[]=['sex','=',request()->sex];}$list=\App\Models\MTest::wher
$post = Post::with(['comments' => function ($query) { $query->where('content', 'like', 'Laravel学院%') ->orderBy('created_at', 'desc'); }])->where('id', '<', 5)->get(); 底层执行的 SQL 语句如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 select * from `posts...
$flights = App\Flight::where('active', 1) ->orderBy('name', 'desc') ->take(10) ->get(); 分块结果 Flight::chunk(200,function ($flights) { foreach ($flightsas$flight) { // } }); 总结: <1>all和get等方法返回一个Illuminate\Database\Eloquent\Collection实例,这个实例中包含多个Eloque...
* DB::table ==>返回查询构造器结果,不会返回一个collect实例 *而 【默认情况下,Eloquent 查询的结果总是返回 Collection 实例】 * 进行transform操作 * add by Daisheng 2018/04/03*/publicfunctiongetdepartment(Request$request) {$department= DB::table('departments')->select('departments.*', 'd.dep_n...
Collection: 转化为集合 其中:eagerLoadRelation()的代码如下 Illuminate\Database\Eloquent\Builder::eagerLoadRelation() protected function eagerLoadRelation(array $models, $name, Closure $constraints) { // 获取关系对象,这里获取关系对象时会通过Relation::noConstraints屏蔽即时加载 ...
$collection = collect([1, 2, 3, 4, 5]);$collection->contains(function ($value, $key) { return $value > 5;});// falseAlternatively, you may pass a string to the contains method to determine whether the collection contains a given item value:$collection = collect(['name' => 'Desk...
The all method returns the underlying array represented by the collection:1collect([1, 2, 3])->all(); 2 3// [1, 2, 3]average()Alias for the avg method.avg()The avg method returns the average value of a given key:1$average = collect([['foo' => 10], ['foo' => 10], [...
1$collection = collect(['name' => 'taylor', 'framework' => 'laravel']); 2 3$flipped = $collection->flip(); 4 5$flipped->all(); 6 7// ['taylor' => 'name', 'laravel' => 'framework']forget()The forget method removes an item from the collection by its key:...
->orderBy('id','desc') ->limit(10) ->offset(0) ->get(); dd($list); // Illuminate\Database\Eloquent\Collection Object // ( // [items:protected] => Array // ( // [0] => App\Models\MTest Object // ( // [table:protected] => m_test ...
$order = DB::table('orders')->find(3); #SQL:select * from `orders` where `id` = ? limit 1 #查询所有纪录 $orders = DB::table('orders')->get(); #SQL:select * from `orders` #查询指定列的所有纪录 $orders = DB::table('orders')->get(['id','price']); ...