Query table from model or controller in Laravel - php

Question

I have table role_user which has two columns user_id and role_id. user_id is the user id from users table and role_id is the id from roles table.
I want to query role_user and show the role name next to each user. Example
table users
user_id username ...
1 Test user
table roles
role_id role_name
1 Admin
table role_user
user_id role_id
1 1
I want to show on page
Test user - Admin
I have added this in my Users model
public function role()
{
return $this->hasOne('App\Role', 'user_id', 'role_id');
}
and this in the controller
public function users()
{
$userRole = User::find(1)->role;
return View::make('users', [
'userRole' => $userRole
]);
}
Currently I've got this which is obvious why:
SQLSTATE[42S22]: Column not found: 1054 Unknown column 'roles.user_id' in 'where clause' (SQL: select * from roles where roles.user_id is null and roles.user_id is not null limit 1)
The question is how to query role_user table from controller or from model and while displaying the users to display role name too.

Answer 1

You have defined your table so one user can have many roles (using a pivot which is your role_user table.
If a user can only have one role you can remove the role_user table and add a column role_id to your users table.
Using your current implementation change role relationship in user model to following.
public function roles()
{
return $this->belongsToMany('App\Role', 'role_user', 'user_id', 'role_id');
}
In your controller
public function users()
{
$users= User::with('roles')->get();
return View::make('users', [
'users' => $users
]);
}
To simply show the names of roles use implode method of returned collection
#foreach ($users as $user)
{{ $user->roles->implode('name', ',') }}
#endforeach

Answer 2

You are using a pivot table to maintain the relationship so you need to
belongsToManyrelation and defining a custom accessor for it, like so:
//User model file
public function roles()
{
return $this->belongsToMany(App\Role::class);
}
public function getRoleAttribute()
{
return $this->roles()->first();
}