Railsのjoinsでplaceholderを使う

team_code='team_A'に所属するメンバーを取得する場合

class User < ActiveRecord::Base
  def self.join_team(team_code)
	User.joins(sanitize_sql_array(['INNER JOIN teams ON team_code = ?', team_code]))
  end
end

呼び出し側

User.join_team('teem_A').where('users.team_id = team.id')