In addition to retrieving a collection of models, you may paginate your search results using the paginate method. This method will return an Illuminate\Pagination\LengthAwarePaginator instance just as if you had paginated a traditional Eloquent query:...
In addition to retrieving a collection of models, you may paginate your search results using the paginate method. This method will return an Illuminate\Pagination\LengthAwarePaginator instance just as if you had paginated a traditional Eloquent query:1use App\Models\Order; 2 3$orders = Order::...
By changing our logic to the above, we are making two queries for the admin user and one query for all other users. 9. Merge similar queries We sometimes need to make queries to retrieve different kinds of rows from the same table. 1$published_posts = Post::where('status','=','publi...
In addition to retrieving a collection of models, you may paginate your search results using the paginate method. This method will return an Illuminate\Pagination\LengthAwarePaginator instance just as if you had paginated a traditional Eloquent query:1use App\Models\Order; 2 3$orders = Order::...
Both accomplish the same end results—eager loading a related model onto the first. In fact, they both run exactly the same two queries. The key difference is that with() eager loads the related model up front, immediately after the initial query (all(), first(), or find(x), for exam...
在Laravel中,可以使用集合(Collection)和查询构建器(Query Builder)来对数据进行分页操作。 集合分页:集合是Laravel提供的一个强大的数据处理工具,可以对数组进行各种操作。要对集合进行分页,可以使用paginate()方法。该方法接受一个整数参数,表示每页显示的记录数。示例代码如下:...
', ]; public function __construct(array $settings = []) { $this->attributes = \array_merge($this->attributes, $settings); } public function type(): Type { return Type::string(); } public function args(): array { return [ 'format' => [ 'type' => Type::string(), '...
$this->eagerLoad = array_merge($this->eagerLoad, $eagerLoad); return $this; } protected function parseWithRelations(array $relations) { $results = []; foreach ($relations as $name => $constraints) { //如果$name是数字索引,证明没有为预加载关联模型添加约束条件,为了统一把它的约束条件设置...
protected function performUpdate(Builder $query, array $options = []) { if($this->timestamps && array_get($options, 'timestamps', true)) { $this->updateTimestamps(); } $product = Product::find($id); $product->updated_at = '2015 -01-01 10:00:00'; ...
laravel 对具有相同ID的数组中的数据求和在MySql/SQL中有SUM查询处理加法，它们被称为聚合函数，在Larave...