在定义一对多关联时返回了一个\Illuminate\Database\Eloquent\Relations\HasMany类的实例,Eloquent封装了一组类来处理各种关联,其中HasMany是继承自HasOneOrMany抽象类, 这也正印证了上面说的一对一是一种特殊的一对多关联,Eloquent定义的所有这些关联类又都是继承自Relation这个抽象类,Relation里定义里
but "null" was returned. Was the "return" keyword used?', static::class, $method )); } throw new LogicException(sprintf( '%s::%s must return a relationship instance.', static::class, $method )); } return tap($relation->getResults...
Next, let's examine the model definitions needed to build this relationship:1<?php 2 3namespace App; 4 5use Illuminate\Database\Eloquent\Model; 6 7class Like extends Model 8{ 9 /** 10 * Get all of the owning likeable models. 11 */ 12 public function likeable() 13 { 14 ...
$articles = Article::latest()->published()->get(); 1. 再去看看效果,相信你刷新之后还是一样的。 总结 又是最后的结尾了,这里我们简单的介绍了queryScope和setAttribute的用法,下一节打算说说Eloquent的一个重要的内容:Eloquent Relationship。那个时候也就会越来越觉得laravel的强大了。 最后:Happy Hacking...
3 ->get();The withTrashed method may also be used on a relationship query:1$flight->history()->withTrashed()->get();Retrieving Only Soft Deleted ModelsThe onlyTrashed method will retrieve only soft deleted models:1$flights = App\Flight::onlyTrashed() 2 ->where('airline_id', 1) 3 ->ge...
Laravel提供了一个非常好用的ORM(Object Relationship Mapping)为Eloquent ORM,其实就是Model层,来管理数据库中的数据表且一一对应关系。Eloquent比较好用在于它提供了很多Feature功能模块,这些模块提供了许多面向对象的方法便于使用,这样就不用写SQL语句了,且代码看起来也很舒服。。不过有时也推荐使用它的Query Builder查...
$role = Role::findOrFail(1); // Pull back a given role // Regular Delete $role->delete(); // This will work no matter what // Force Delete $role->users()->sync([]); // Delete relationship data $role->perms()->sync([]); // Delete relationship data $role->forceDelete(); ...
接下来就是怎么使用的问题了。 Route::get('model/test/relationship',function() { $id=(int)request()->get('id',0); $info=\App\Models\MTest::find($id); dump(
When using JSON columns in your database, the field won't be defined as a "relationship", but rather a simple column with nested data. To get a nested object that's not a database relationship, use the is_relation attribute in your Type:...
注意在这里我们使用了laravel5提供的route model binding特性,我们在控制器中使用Task类typehinting了task参数,而该task参数,而该task参数和routes.php中定义的wildcast路由Route::get('tasks/{task}','xxx'}定义的task相匹配,因此laravel在调用我们的控制器时自动注入Task模型(以id为索引)。这个功能后续再做进一步的...