Recursive custom to_json in Ruby for arrays of objects or nested objects

class User
  def to_json
    super(:except => [:password, :password_salt, :encrypted_password,
      :last_sign_in_ip, :updated_at, :current_sign_in_ip,
      :remember_token, :reset_password_token, :remember_created_at])
  end
end

@user = User.first
@user.to_json
# works fine

@users = User.all
@users.to_json
# prints all attributes (does not hit our custom to_json)

@users = User.all
data = {}
data[:results] = @users
data[:count] = @users.length
data.to_json
# prints all attributes (does not hit our custom to_json)

class User
def as_json(options)
    super(:except => [:password, :password_salt, :encrypted_password,
      :last_sign_in_ip, :updated_at, :current_sign_in_ip,
      :remember_token, :reset_password_token, :remember_created_at])
  end
end
 
...
@users = User.order_by("last_name")
      if @users
        data = {}
        data[:results] = @users
        res = data.as_json
        ActiveSupport::JSON.encode(res)
...