Repeater field with post object – sort by post object custom field

• eadadmin

• April 6, 2018 at 2:03 am

Kind of a strange one here! I have a repeater field where one of the subfields is a relationship field with a custom post type.

I’ve got everything working and displaying perfectly, except, I’d like to sort the repeater by a custom field of the post object subfield.

Example:

row 1:
post_id = 18553
custom_field on that post_id = ‘this’

row 2:
post_id = 18620
custom_field on that post_id = ‘that’

row 3:
post_id = 19784
custom_field on that post_id = ‘this’

I’d like the repeater to display with:

THIS
18553
19784

THAT
18620

I’ve looked through all of the sorting info and I’m a bit lost as to how to apply the sorting to a get_field of a sub_field in a repeater. Thanks for any help you can provide!