仅使用一条错误消息进行Rails组验证

Question

模型中的以下验证代码：

validates :formatted_address, :zip, :city, :state, :country, :presence => true, :message => "is incomplete. Please enter full address."

当任一字段为空时显示

。我们现在说:address和country为空，显示2个错误：

Formatted Address is incomplete. Please enter full address.
Country is incomplete. Please enter full address.

如果验证的任何一个字段不存在，我如何将验证中的错误消息分组为只显示一条错误消息？

Address is incomplete. Please enter full address.

感谢。

Answer 1

您可以使用validate macro编写自己的验证器：

validate :has_complete_address

#...

private
def has_complete_address
    # Check that everything is there and
    # call self.errors.add to store an error
    # message if something is wrong.
end