有条件的验证RAILS模型

Question

在我的模型文件中，我试图根据隐藏窗体值进行条件验证。它看起来像：form_type_main？方法永远不会被调用，或者只是不起作用。想我做错了吗？

attr_accessor(:form_type,:field1,:field2,:field3,:field4) 

    required_main = ["field1", "field2"] 
    required_second = ["field3", "field4"] 

    if :form_type_main? 
    required = required_main 
    else 
    required = required_second 
    end 

    required.each do |i| 
    validates_presence_of i 
    end 


    def form_type_main? 
    form_type == "main" 
    end 

Answer 1

您可以简单地这样定义的验证：

REQUIRED_MAIN = [:field1, :field2] 
REQUIRED_SECOND = [:field3, :field4] 

validates_presence_of *REQUIRED_MAIN, if: :form_type_main? 
validates_presence_of *REQUIRED_SECOND, unless: :form_type_main? 

def form_type_main? 
    form_type == "main" 
end