Date depending of other date (re-open of #38) about validates_timeliness

[adzap]

The validation will only work if the start_date has a value.

Also, remove and the :unless and use :allow_blank => true.

If you can't get it working I need you provide a test case with example input data.

[sewid]

Got it working, it was a stupid one:

validates_date :end_date, 
  :on_or_after => :start_date, 
  :on_or_before => lambda { |c| c.start_date.to_date + 90.days }, 
  :allow_blank => true

Problem was, that my model has no database attached, so the start date field has no type. I had to convert it to a date and it works...

Thanks a lot!