I wonder, can I do a reverse search over ACF fields?
To take your example of the Gym classes from the acf demo videos. If I want to list all the courses for a particular instructor, can I do that via the Dynamic Content Query?
Hi @Regnalf,
I’m sorry, regretfully it isn’t possible to alter, filter, invert, etc. any of the data coming out of the Looper Provider. You can only loop over the structure it outputs. It could be possible using a Custom Looper and some PHP code. You would need to write a PHP function that rearranges the data the way you need it before returning a new array.
Thank you, I already thought that it would come down to that. But it might have been that I missed something in the “looper business”. 
Anyway, I’ve already used the custom provider, and it works beautifully. An absolutely distinctive feature of pro!
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