Is there a way to check if a custom field is empty using the API?
The check for 'IS Not Null' appears to work to an extent, but only if a custom field is not part of a set of custom fields, When one of the custom fields get given a value, the others change from Nulls to blanks.
e.g. custom_1 = Null custom_2 = Null custom_3 = Null set custom_1 = "some_string" custom_2 = (becomes empty string) custom_3 = (becomes empty string)
API is null check fails as they are no longer null..
API check for != '' doesn't work API check for <> '' doesn't work etc etc
Any thoughts or is this a bug?