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I saw this: https://github.com/jbroadway/elefant/issues/267 and it made me wonder: is there a way to tell a form to validate a value only if it's filled in? I.e., email = 1 returns OK if there is no email or if there is an email and it's valid.
email = 1
I believe what you're looking for is skip_if_empty = 1
skip_if_empty = 1