Check number when saving

• patjaboo

• August 4, 2017 at 10:17 pm

I have created a CustomField “PostObject” with multiple selection and as mandatory field. At least 2 values have to be entered. Can I do this via “Conditional Logic” or is there a different solution?

• John Huebner

• August 5, 2017 at 4:04 am

https://www.advancedcustomfields.com/resources/acf-validate_value/ In your case the value passed will be an array of post IDs and you need to check that it contains at least 2

if (count($value) < 2) {
  $valid = 'Select at least 2';
}