让所有用户在Laravel中扮演角色

Question

I'm working in this Laravel project which has this structure

users: id | first_name |...

roles: id | name

assigned_roles: id | user_id | role_id

I think this is quite obvious :p

User model

class User extends ConfideUser {
use HasRole;

public function Roles(){
    return $this->belongsToMany('Role','assigned_roles');
}

Role model

class Role extends EntrustRole
{
public function Users()
{
    return $this->belongsToMany('User','assigned_roles');
}


} 

I'm looking for a way to get all users with a specified role in this case 'Teacher'. I've tried this:

$students = User::with(array('Roles' => function($query) {
        $query->where('name','Teacher');
    }))
    ->get();
    return $students;

but this always returns an array of all users.

would anyone know why that's so? Thanks!

Answer 1

What you're currently asking laravel for in your $students query, is 'give me all the students, and for each student get me all of their roles if the role is teacher'

Try using the whereHas

$students = User::whereHas(
    'roles', function($q){
        $q->where('name', 'Teacher');
    }
)->get();

This should get you the users, but only where they have a role where the name is teacher.