Laravel 从多对多关系中获取关系

Question

I have 3 models: User , Company and Vacancie .

The Models have the following relations:

User many to many Company

Company one to many Vacancie

How can I get all Vacancie a User has access to?

I've found this answer but auth()->user()->with('companies.vacancies')->get(); returns all users of my database.

Answer 1

You can do something like this:

$userId = $request->user_id;
$vacancies = Vacancie::whereHas('companies', function ($q) use ($userId){
    $q->whereHas('users', function($q1) use ($userId) {
        $q1->where('users.id', userId);
    });
})->get();

In this code, I'm considering that you have the relations companies() in Vacancie and users() in Company .

This will do the inverse of what you are doing now. When you call get() in the user model, you will get all the users with the relations pré-loaded ( with() ).

Answer 2

Create a vacancies relationship on the User model as follows:

//inside the User model
public function vacancies()
    {
        $vacancies= new Illuminate\Database\Eloquent\Collection;

        foreach($this->companies as $company)
        {
            $vacancies = $vacancies->merge($company->vacancies->get());
        }

        return $vacancies->unique();
    }

Then you can do auth()->user()->with('vacancies')->get() . Not tested, but the general idea holds.