[英]Saving many-to-many relationship, sync/attach doesn't exist?
我有两个跟随2个模型的多对多关系:
use Illuminate\Database\Eloquent\Model;
class Permission extends Model
{
/**
* The database table used by the model.
*
* @var string
*/
protected $table = 'permissions';
/*
|--------------------------------------------------------------------------
| Relationship Methods
|--------------------------------------------------------------------------
*/
/**
* many-to-many relationship method
*
* @return QueryBuilder
*/
public function roles()
{
return $this->belongsToMany('App\Admin\Role');
}
}
和
class Role extends Model
{
/**
* The database table used by the model.
*
* @var string
*/
protected $table = 'roles';
/*
|--------------------------------------------------------------------------
| Relationship Methods
|--------------------------------------------------------------------------
*/
/**
* many-to-many relationship method.
*
* @return QueryBuilder
*/
public function users()
{
return $this->belongsToMany('App\Admin\User');
}
/**
* many-to-many relationship method.
*
* @return QueryBuilder
*/
public function permissions()
{
return $this->belongsToMany('App\Admin\Permission');
}
}
我在这里要做的是创建一个可以创建新角色的页面,并将该角色与已创建的权限相关联:
@foreach ($permissions as $permission)
<label class="checkbox">
<input type="checkbox" value="{{ $permission->id }}" name="permissions[]" id="permission_{{ $permission }} }}">
{{ $permission->permission_title }}
</label>
@endforeach
在控制器中,我尝试从页面中提取所选权限并保存所有内容:
// logic to save role
$role->save();
$permissions = Input::get('permissions');
$role->permissions->sync($permissions);
但是,在执行完最后一条语句后,我收到以下错误: exception 'BadMethodCallException' with message 'Method sync does not exist.
“同样的错误,我得到了attach
,以及。 另外,我不确定我是否应该提供中间表permission_role
的名称? 谢谢。
您需要使用以下内容:
$role->permissions()->sync($permissions);
别忘了()
编辑:更多解释:
$role->permissions
是一个Collection实例。
$role->permissions()
是一个包含sync()
方法的belongsToMany
实例
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.