I was starting on learning some Laravel. I am working on a website where you can create an account, which can have roles, and depending on what roles you have, you can do stuff. What it is isn't important, but let me explain the whole situation.
I do have 3 tables:
users
, which stores information about all users.roles
, which stores information about all roles (just id
+ name
)user_roles
, which stores which roles users have. It has an id
column (for PK), an user_id
column (as FK to users
. id
) and a role_id
column (as FK to roles
. id
)I do have 2 models:
Model Users:
class User extends Authenticatable
{
use Notifiable;
/**
* The attributes that are mass assignable.
*
* @var array
*/
protected $fillable = [
'name', 'email', 'password', 'mood'
];
/**
* The attributes that should be hidden for arrays.
*
* @var array
*/
protected $hidden = [
'password', 'remember_token',
];
public function roles() {
return $this->belongsTo('App\Role');
}
}
Model Roles:
class Role extends Model
{
protected $table = 'roles';
protected $fillable = ['role'];
}
Now, what I did in one of my controller is add the following line:
var_dump(Auth::user()->roles()->get())
So I got my user, I am logged in, I did add a role and I did add a new user_roles row (with my user ID and the ID of the role I added). However, the var_dump still returns an empty array instead of the role I have. I don't understand what I did wrong
User
- Role
is an M:M relationship. One user can have many roles; and also, one role can be used by many users.
For many-to-many relationships Laravel (Eloquent) provides the belongsToMany
method. Here is the docs: https://laravel.com/docs/5.6/eloquent-relationships#many-to-many
Therefore, you need to replace this method in your User
class:
public function roles() {
return $this->belongsTo('App\Role');
}
with this:
public function roles() {
return $this->belongsToMany('App\Role');
}
Also, you need to tell Laravel what name the pivot table has. You can either pass it as a second argument to the belongsToMany
method, or just name it roles_users
and Laravel will figure it out (how does it do that is also in the docs).
This is not how belongsTo works, you need to use different relation method because belongsTo checks for "roles_id" column in User model which does not exist.
hasManyThrough should do the trick iirc
I am not gonna provide you direct solution because it would do more charm rather than help, but you need to read documentation at https://laravel.com/docs/5.6/eloquent-relationships
Documentation has example how to get country posts through user table somewhere in the middle.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.