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Rails has very nice features to validate a model (directly mapped on your database). However it gets sometimes sloppy if you don’t know the exact command to do your validation.Here’s a trick I had a hard time to find. |
Everybody knows how to validate the uniqueness of a field in a database :
validates_uniqueness_of :date
If you now want to validate the uniqueness of a couple (ex: date,user_id) here’s how you can:
validates_uniqueness_of :date, :scope => :user_id
if anyone is wondering about how to get the error message to show in the view here it is:
I spent some time trying to find the answer to this one
i had to take out the surrounding symbols because they didnt show, maybe the author can fix this
= error_messages_for ‘model_name_goes_here’