We've got two channel, Images and Videos, that we're combining in search results. Searching by keyword works great. So does sorting by entry_date and title. But we'd also like to sort by other fields.
To simplify things, imagine a custom field in each channel - video_score, image_score - that hold integers received from elsewhere. So, how would it be possible to combine these two for the orderby?
If it's easier we can create fields video_order and image_order with unique ordering numbers, but due to the custom fields being in two channels I don't see how to use the same custom field name, which appears to be what we need for orderby.
Do we maybe need to hijack a core field?