将元素同步到Laravel上的孩子

Question

My Shema database is

User Table

    id
    login
    parent

Sign Table

    id
    name
    user_id (Sign owner)

Pivot table user_sign

    id
    user_id
    sign_id

My User model contain

    public function signs() {
        return $this->belongsToMany('App\Sign', 'user_sign');
    }


    public function parent(){
        return $this->belongsTo('User', 'parent');
    }

    public function children(){
        return $this->hasMany('User', 'parent', 'user_id');
    }

And my Sign model contain

    public function users() {
        return $this->belongsToMany('App\User', 'user_sign')->select(['users.id','name']);
    }

A parent user can attach / sync Sign to a child user via this route (he send sign_id and child_id)

    Route::put('sign/share', 'SignController@share')

To do this action, in my controller i must check : - if Owner of sign_id is $user_id - If child_id is child of $user_id

And after that, i do my attach / sync.

Now, in my controller i have :

public function share(Request $request)
{
    $userId = $request->input('user_id');
    $sign = Sign::where('user_id', $userId)->find($id);

    if(!$sign){
        return response()->json(['message'=>'FAIL'], 404);
    }
}

But I completely blocked after this... It's possible to check and attach in one line ?

Thanks for your help

Answer 1

As far as syncing/attaching you can use this sytanx

$user->roles()->sync([1, 2, 3]);

As given in Laravel Docs

You can do the both checks in the condition of IF and assign in case of true, thats how your controller will look like finally.

    public function share(Request $request)
    {
        $userId = $request->input('user_id');
        $signId = $request->input('sign_id');
        $childId = $request->input('child_id');            
        if (Sign::find($singId)->user_id == $userId && User::find($userId)->child_id == $childId) 
        {

           //Attach the sign to child user
           User::find($childId)->signs()->attach($signId);

        }
        else 
        {

              return response()->json(['message'=>'FAIL'], 404);

        }
    }