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I am using the Field validation module to validate a text field using the Length rule with a minimum length of 1.
When the field is left empty, no validation error is shown.
Setting the field as required is not the solution for this specific case, as it causes problems with a module I am using.
How can I avoid users don't enter a value for that field?
I resolved the issue using the Clientside validation module, which has a sub-module that adds client side validation support for the Field Validation module.
Commerce Product OptionshasRequiredsetting bugged and doesn't work. I got Select List fields already working with Field Validation and now need to make it work with Text field. But ran some test on fresh install and looks like Length rule doesn't even work on regular content type Text fields.