问题描述
validate :updatable? # First validation there is
with_options :if => Proc.new { |object| object.errors.empty? } do |updatable|
updatable.with_options :if => "self.current_step == basic" do |step|
validates .... bla-bla bla
因此，在进行任何验证之前，将调用 updatable 子例程，该子例程将在errors[:base]数组中填充适当的错误，这意味着该对象不可更新.如果此子例程中发现任何错误，我希望它跳过其余的验证，但是上述示例不有效-它执行所有验证.
So, before any validations are made, the updatable subroutine is called and it populates the errors[:base] array with appropriate errors, meaning that object is not updatable. And I wanted it to skip the rest of the validations if any errors are found in this subroutine, but abovementioned example is NOT working - it performs all the validations.
但是，如果我将:if => "self.current_step == basic"更改为:if => "self.errors.empty? && self.current_step == basic"的话，它就像是一种魅力.
But, if I change :if => "self.current_step == basic" to :if => "self.errors.empty? && self.current_step == basic" is works like a charm.
我做错了什么?示例显示，嵌套的with_option应该有效.
What I'm doing wrong ? Examples show, that nested with_option should work.
有人可以帮助我吗?预先感谢.
Can someone help me ? Thanks in advance.
推荐答案
您是正确的，当嵌套两个:if条件时，内部的将替换外部的，并始终进行检查.处理两个嵌套级别的解决方法是:
You are right that when nesting two :if conditions, the inner one will replace the outer one and always be checked. A workaround to handle two levels of nesting is:
with_options :unless => !(outer condition) do
with_options :if => (inner condition) do
if和除非条件不会相互覆盖.我不确定我是否将其称为错误，但是如果您可以嵌套多个:if条件，那就太好了.
The if and unless conditions do not overwrite each other. I'm not sure I would call this a bug, but it would be nice if you could nest multiple :if conditions.
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