I have 2 date tv, start and enddate. validationrules: startdate should be filled, enddate - if set (could be left empty) - should be later than startdate. The validation should effect the creation and updating of ressources. How to archive this custom validation?
I think you have 2 similar threads but I would try suggestions in this thread:
https://forums.modx.com/index.php?topic=67378.0
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