Related tables in Yii2, what's wrong?

Question

Yii

Hello! Application on Yii2, Oracle database.
There are tables:

1. projects
   
2. user (Users)
   
3. user_projects (Users in the project) many to many fields - project_id, user_id
   

I link them in the Projects model like this

public function getUserProjects()
    {
        return $this->hasMany(UserProjects::className(), ['project_id', 'id']);
    }

public function getUsers()
    {
        return $this->hasMany(User::className(), ['id', 'user_id'])->via('userProjects');
    }

as a result, if you do $model->users, it gives an error Getting unknown property: common\models\Projects::project_id.

Answer 1

public function getUserProjects()
{
    return $this->hasMany(UserProjects::className(), ['project_id' => 'id']);
}
public function getUsers()
{
    return $this->hasMany(User::className(), ['id' => 'user_id'])
        ->via('userProjects');
}

I recommend using Gii and then there will be no such problems.