Yii2: How to make hasMany through cross table and count all records?

Question

Yii

I do not quite understand how to make a selection through the crosstab.
There is a list of clubs. there are users who can be in several clubs at once.
You need to
1. count the number of users in each club
2. display a list of users on the club page

Answer 1

public function getMembers(){
    return $this->hasMany(\app\models\User::className(), ['id'=>'user_id'])
      ->viaTable('users_clubs', ['club_id'=>'id']);
  }

  public function getMembersCount(){
    return $this->getMembers()->count();
  }