Validates that one date is before another one

How could I use validation in Ror to validate that one date is before
the other date ?


Thanks for the answer.

You can put custom validations in the "validate" method on your
model. You can use any ruby code there to do validations.

Look on the web or the source of existing validations for examples on
how to format the error objects.


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thnx for the help.