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I have a list of 350 or so terms that I am trying to set to a post. Here's my code:

add_action('init', 'add_cities_to_story');
function add_cities_to_story() { 
    $cities_list = get_term_children('115', 'location'); // MA
    wp_set_object_terms('632', $cities_list, 'location'); 
}

The trouble is that it appears to timeout about 3/4 of the way through the list.

Also, any ideas how to bulk remove the tags from a post? :)

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You should be careful with wp_set_object_terms() because by default it will remove any existing terms on the object that aren't duplicated in the $terms argument. In this case you'd lose all locations not in $cities_list. –  jeremyclarke Sep 9 '11 at 21:25
    
FWIW I'd also propose that you revisit the decisions that lead you to want to add hundreds of terms to a single post. That is probably not the right way to go in terms of taxonomy design and if used regularly will give you a lot of headaches as your database grows over time. –  jeremyclarke Sep 9 '11 at 21:27
    
@Jeremy, thanks for the comment! My original goal was to get the "empty" terms to display on the front end by having a post associated with each term. It turns out I didn't need to do that. –  Jonathan Wold Sep 13 '11 at 0:32
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1 Answer 1

up vote 1 down vote accepted

Dealing with terms is known to be very heavy operation.

The common tweak recommended is to use wp_defer_term_counting() to temporarily disable updating of terms count (which is stored persistently in database and so must be updated when you change terms).

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Would I just include that to run in my function before I use wp_set_object_terms? –  Jonathan Wold Jul 18 '11 at 21:23
    
@Jonathan turn off before, turn back on after –  Rarst Jul 18 '11 at 21:59
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