DEV Community

loading...
Cover image for Avoid Ambiguous Column Eloquent Query Exception in Laravel

Avoid Ambiguous Column Eloquent Query Exception in Laravel

arielmejiadev profile image Ariel Mejia ・1 min read

Scenario: you have some relationship and you want to get only a few columns.

Models:

User:

public function teams()
{
    return $this->belongsToMany(Team::class);
}
Enter fullscreen mode Exit fullscreen mode

Team

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

Then you can attach users to teams like this:

Team::users()->attach(auth()->user());
Enter fullscreen mode Exit fullscreen mode

and now you can get a collection of users by teams like:

$users = Team::users;
Enter fullscreen mode Exit fullscreen mode

Ok here all fine, maybe you need to pass data to an API or just to a view but, User model has sensitive data or maybe your User model is huge and its a better approach to get only the data that you need, maybe you want the name and email only, you are probably doing something like this:

$team = Team::first();
$team->users()->select(['name', 'email'])->get();
Enter fullscreen mode Exit fullscreen mode

Here you would see some eloquent exception, this is because the User model has a column name and Team model could have a column name too, but dont worry like all in Laravel is really easy, just be explicit with the table and the columns that you need:

Team::users()->select(['users.name', 'users.email'])->get();
Enter fullscreen mode Exit fullscreen mode

The same idea apply when you need to add a "where" method:

Team::users()->where('users.email', $request->get('email'))->get();
Enter fullscreen mode Exit fullscreen mode

Discussion

pic
Editor guide