And as a side note: While you can always ask your questions here, i think you have a better chance of a good answer if you post your questions on StackOverflow: stackoverflow.com/questions/tagged...
Thanks for your reply stephan, However, I was trying to filter my posts (courses in my case) by their related field's (university's) title or other field. I couldn't find a solution for relationship query except one for filtering by ID.
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First of you are passing a post_title for a meta field key, while the meta field in this case should just be 'related_university'.
Second the value for this meta field is probably a array of post id's or post objects, not a string like you are passing.
Acf has a nice post about this here: advancedcustomfields.com/resources...
And as a side note: While you can always ask your questions here, i think you have a better chance of a good answer if you post your questions on StackOverflow: stackoverflow.com/questions/tagged...
Thanks for your reply stephan, However, I was trying to filter my posts (courses in my case) by their related field's (university's) title or other field. I couldn't find a solution for relationship query except one for filtering by ID.