[wp-hackers] Like Posts - Store Data in DB, User_Meta or Post_Meta

[chriscct7]

It depends why you are storing it. If you store it in user_meta, to say make
a feature that lets users find the posts they favorited, you can get all the
posts in a single query to the user_meta, versus querying all posts that
have a meta_key with a meta_value that contains a given user->ID. Now if you
are making a feature where you want to know who favorited a post, store all
the user->Id's in a post_meta. Then for a given post you can query a single
post_meta versus querying all users with a given meta_key with a meta_value
that contains a given post->ID





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