多对多关系 [英] many-to-many polymorphic relations
问题描述
我需要在Entity2,Entity1和Types之间创建一个多态关系。
事件和类型之间的关系很容易做到,但是在Entity2和Types之间的关系中有一个问题,因为它是一个多对多关系。
I need to create a polymorphic relationship between Entity2, Entity1 and Types. the relationship between event and Types is easy to do, but tou have a problem in the relationship between Entity2 and Types, because it is a many-to-many relation.
class CreateTypesTable extends Migration {
public function up()
{
Schema::create('types', function(Blueprint $table) {
$table->increments('id');
$table->integer('typeable_id');
$table->string('typeable_type', 20);
$table->string('name', 20);
$table->text('description')->nullable();
});
}
}
class Entity1 extends Eloquent {
public function type()
{
return $this->morphMany('App\Models\Type', 'typeable');
}
}
class Type extends Eloquent {
public function typeable()
{
return $this->morphTo();
}
}
作为类型和Entitys2之间的关系是很多到很多,不知道如何创建,因为它需要一个数据透视表。
as the relationship between types and Entitys2 is many to many, do not know how to create, because it takes a pivot table.
class Entity2 extends Eloquent {
public function types()
{
// return $this->morphMany('App\Models\Type', 'typeable');
}
}
推荐答案
你需要为多对多关系使用另一种多态方法: https://github.com/laravel/framework/blob/master/src/Illuminate/Database/Eloquent/Model.php#L805 morhpToMany 和 belongsToMany 将相关模型作为参数传递。
You need to use another polymorphic method for a many-to-many relationship: https://github.com/laravel/framework/blob/master/src/Illuminate/Database/Eloquent/Model.php#L805 morhpToMany and belongsToMany where you pass the related model as a parameter.
这篇关于多对多关系的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!