I've been using field validation in Drupal 7 and I now need to redo the site in Drupal 10. In Drupal 7, there's a Validator parameter with a lot of options, one of them being Unique values. Works great. This is for an inventory site that keeps track of a lot of items; unique SKUs are essential.
In Drupal 10, though, the Validator setting doesn't exist. There's a Condition setting where I can choose the field, but then there's only an Operator dropdown where I can only set an operator - there's no unique value setting.
Am I missing something? Any assistance greatly appreciated!
UPDATE: I see - Unique is available in mappings after the import is created. Never mind... perhaps this will help someone else...
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3.0
Documentation
You can enable sub module field validation legacy, which has a unique validator, the function is the same with Drupal 7.
The default unique value is using Drupal'core unique constraint, it has limit option.