Laravel addGlobalScope与关系

Question

Good afternoon,

I have the following tables with relationships:

users

 class User extends Authenticatable

        public function profiles()
        {
            return $this->hasOne(Profile::class);
        }

        public function sites()
        {
            return $this->belongsToMany(Site::class);
        }

profiles

class Profile extends Model

    public function users()
    {
        return $this->belongsTo(User::class);
    }

sites

class Site extends Model

    public function users()
    {
        return $this->belongsToMany(User::class);
    }

In the database there is a site_user table with site_id and user_id columns. I would like to create a global scope in each of the Profile and User models. The aim of the global scope is as follows:

• Profile Model Filter out the profiles where the auth()->user->site->id (array of results as user may belong to many sites) are equal to the profile->user->site->id (array of results).

• User Model Filter out the users where the auth()->user->site->id (array of results as user may belong to many sites) is equal to the user->site->id (array of results).

    public static function boot() { parent::boot(); static::addGlobalScope('scope_site_id', function (Builder $builder) { $builder->where('site_id', '=', [auth()->user()->sites->pluck('id')]); }); } 

I can get this to work if I have a column in the users and profiles tables (site_id) and reference this however this is only for 1 site and the user may belong to many.

Thank you in advance for any advice.

Best regards

Answer 1

I pulled the global scope out of the Model and created a Scope file in the /app. as follows:

<?php

namespace App\Scopes;
use Illuminate\Database\Eloquent\Scope;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Builder;

class UserScope implements Scope
{
        public function apply(Builder $builder, Model $model)
        {

            $authUser = auth()->user()->sites()->select('id')->get()->pluck('id')->toArray();
            $builder->whereHas('sites', function($q) use($authUser) {
                $q->whereIn('id', $authUser);
            });
        }
}

The problem I was having was using where instead of whereHas and whereIn as per above.

Then in the User Model include the following:

use App\Scopes\UserScope;

    protected static function boot()
    {
        parent::boot();

        static::addGlobalScope(new UserScope);
    }

Spartieboy your answer was correct for returning the users site id as an array. Thanks for that.

The only problem is that when I log out of the app and log back in I get the following error:

"Call to a member function sites() on null" - hitting the following code:

            $authUser = auth()->user()->sites()->select('id')->get()->pluck('id')->toArray();

Answer 2

Update

For login issue change User Model as per below:

use App\Scopes\UserScope;

    protected static function boot()
    {

        parent::boot();

        if (!app()->runningInConsole() && Auth::check()) {

            static::addGlobalScope(new UserScope);
        }
    }

}