Profile: katjaL

Problem:
How to only include posts in the results of a View where a custom field equals some value, but where the custom field might not exist for some posts.

Solution:
If you use the != comparison with a custom field filter it will exclude any posts where the field is not set, in which case you would need to modify the View arguments using the API to add a test for whether the field exists. (That's how WordPress queries work.)

An example of such code is given below: https://toolset.com/forums/topic/show-all-others-but-those-who-has-certain-value-in-radio-field/#post-1259327

The client decided to use a taxonomy instead which doesn't have this same problem.

Relevant Documentation:
https://toolset.com/documentation/programmer-reference/views-filters/#wpv_filter_query