How ca I validate two correlated fields?

rubyonrails-talk
1

Hello, I have problem with custom validator which should check such situation: I have two fields text_field 'object', 'others' and text_field 'object', 'others_area' I "raise" error if others is nil but others_area is filled up also when others is not nil but others_area isn't numeric If both fields are nil it's ok i allow such situation. How can I do that in one correlated validator?

Best regards, Adr

2

Please attach some code or try explain better, because i don't understand you

3

Simple. Use custom validation in your model of 'object'.

Use something like this:

class Bla < ActiveRecord::Base

  def validate         if others.nil? and others_area.not_numeric? then            errors.add("nasty thing", "happenned")         end    end end

4

Hi thx for response, i tried to write way you described but stuck with such code: def validates_correlated_presence_of(*attr_names)   send(validation_method(:create)) do |record|     value1 = record.send(attr_names[0])     value2 = record.send(attr_names[1])     if(!value1.nil? || !value2.nil?)       #validates_presence_of(attr_names[0], attr_names[1], :message => "must be filled")       validates_presence_of(attr_names[0], :message => "must be filled")       validates_presence_of(attr_names[1], :message => "must be filled")     end   end end

Validator goes all lines of code but validates_presence_of(attr_names[0], :message => "must be filled") isn't adding any errors to record object. Is it possible to embed one validator into another?

Best regards, Adr