Sitecore Next.js Sitecore Forms Validation

Question

I faced several issues getting the validation running with Sitecore Forms in combination with Next.js.

• Issue 1: backend validation is not executed
• Issue 2: backend validation was not showing up as errors on the client side

Answer 1

Issue 1: backend validation is not executed

• Check if Validator is checked on form editor field properties and is saved on the item in a correct way.
• I had to set the attributes on my inherited ViewModel Value property like [DynamicRequired], [DynamicValidation]

Issue 2: backend validation was not showing up as errors on the client side

• Check if your Sitecore validation item has a language version of your form and the message field filled up because otherwise, the client will not get an error message even if the validation failed.