Laravel 同步错误
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Laravel Sync error
提问by Udders
I am running the following code,
我正在运行以下代码，
if( $organisation->save() ) {
if(isset($members)) {
$organisation->users()->sync($members);
}
if(isset($teams)) {
$organisation->teams()->sync($teams);
}
if(isset($teams)) {
$organisation->clients()->sync($clients);
}
if(isset($projects)) {
$organisation->projects()->sync($projects);
}
$organisation->load('users');
$organisation->load('teams');
$organisation->load('clients');
$organisation->load('projects');
return Response::make($organisation, 200);
}
I am am getting the following error when I try and sync $projects,
当我尝试同步时出现以下错误$projects，
the array looks like this,
数组看起来像这样，
[0] => 6so a very very simple array. My relationships in the models look like this,
[0] => 6所以一个非常非常简单的数组。我在模型中的关系看起来像这样，
Organisation
组织
public function projects()
{
return $this->hasMany('Project');
}
Projects
项目
public function organisations()
{
return $this->belongsToMany('Organisation', 'organisation_id');
}
As you can see I an organisation can have many projects. I cannot see a reason why I would be getting the following error,
如您所见，一个组织可以有许多项目。我看不出出现以下错误的原因，
Call to undefined method Illuminate\Database\Query\Builder::sync()
调用未定义的方法 Illuminate\Database\Query\Builder::sync()
回答by Marcin Nabia?ek
As it's many-to many relationship in both functions you need to use belongsToMany, so you should use:
由于您需要使用这两个函数中的多对多关系belongsToMany，因此您应该使用：
public function projects()
{
return $this->belongsToMany('Project');
}
instead of:
代替：
public function projects()
{
return $this->hasMany('Project');
}
sync()works only for many to many relationship
sync()仅适用于多对多关系
