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I have a custom meta box, using WPAlchemy, in which I am looking to get rid of. However, I would like to get all posts that have a specific custom meta value set, and insert it into the begininning of the post content, then delete the meta value.

I have a feeling this post gets me close, as I have been able to successfully add content to the beginning of posts, but have been unsuccessful accessing and adding the custom meta value I'm after. I'm also a little unsure of when to hook into WordPress and perform my actions.

Anyone have any suggestions on the best way to go about this? I figured I would build a simple plugin, activate it, let it do it's job, then remove it.

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1 Answer 1

up vote 0 down vote accepted

what about something like this on activation?

function wpa47153_run_once(){

    $posts = get_posts(array('numberposts' => -1) );

    foreach($posts as $p) :  

        $meta = get_post_meta($p->ID, 'meta_key',true);

        if($meta) :

            $my_post = array();
            $my_post['ID'] = $p->ID;
            $my_post['post_content'] = $meta . "<br/>"  . $p->post_content ;

            // Update the post into the database
            wp_update_post( $my_post );

            //remove the meta key
            delete_post_meta($p->ID, 'meta_key');




where get_posts and get_post_meta are tweaked to your circumstance.

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Yes, exactly :) When testing, I was trying to do this in the theme itself. When doing it in the plugin, and upon activation, it worked perfectly. Thanks you! I should note for others, with WPAlchemy, meta is stored in an array. So the IF statement and $meta being added used $meta['my_meta_field_key']. –  thelukemcdonald Mar 28 '12 at 23:45
going point. alchemy can save to a non-array in extract-mode, but array-mode is default. –  helgatheviking Mar 29 '12 at 13:18

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