Can't use wp_query "meta_key" parameter to filter posts

This topic has 4 replies, 2 voices, and was last updated 8 years, 11 months ago by Anh Tran.

Viewing 5 posts - 1 through 5 (of 5 total)

Author

Posts
November 29, 2015 at 10:50 PM #1823

[email protected]
Participant

I think my problem may be tangentially related to this post.
https://support.metabox.io/topic/wp_query-with-meta_value-impossible-on-cloned-data-fields-array/

I'm trying to filter posts that have a custom field created using the groups extension, based on the value of a meta key.

The meta key I'm trying to use:
'meta_key' => 'end_date_AUCTION_HERO',

If I var_dump rwmb_meta($META_ID.'_text_block')
I can see end_date_AUCTION_HERO is a valid key, so that's something.

I know I can get access to the metabox.io custom field keys of post within a wp loop easily, but it doesn't seem possible to access them outside the loop, like when you need to make an instance of wp_query

I could get it like this within a loop
//LOOP
$META_ID = 'AUCTION_HERO';
$text_block = rwmb_meta($META_ID.'_text_block');
echo $text_block['end_date_AUCTION_HERO_'.$META_ID]
//END LOOP

I can't do that outside the loop of course, because rwmb won't spit anything out.

Is it possible to do this with groups, or alternatively, without groups?
I've definitely done this task before when making custom fields from scratch, just seem to be having trouble with metabox.

Add New Note to this Reply

November 30, 2015 at 2:14 PM #1825
Anh Tran
Keymaster
Hi, as I understand, there are 2 problems here:

1. Filtering WP_Query directly with meta values from group
2. Get the meta values from group outside the loop and use them to filter the query

Regarding the 1st problem: it's the same problem of sanitization data as in the link you provided. Data for a group is saved as a sanitized string of an array. So it's can't be used directly to filter the query.

The 2nd issue seems the solution you made to filter the query, by getting the meta values first (and maybe compare them with a specific value). It's very simple to get the value outside the loop. All you need to do is providing the 3rd param for rwmb_meta function: the post ID, like this:
```
//END LOOP
$post_id = ''; // Set the post ID here
$META_ID = 'AUCTION_HERO';
$text_block = rwmb_meta($META_ID.'_text_block', '', $post_id );
echo $text_block['end_date_AUCTION_HERO_'.$META_ID];
```
Add New Note to this Reply
November 30, 2015 at 11:11 PM #1828

[email protected]
Participant

Thanks!

I'm going to try this out, and get back to you.
I also had the idea of not using wordpress' filtering logic, but manually do it myself within the loop, and not echo html unless the post passes my filter.

Will reply soon.

Add New Note to this Reply

November 30, 2015 at 11:15 PM #1829

[email protected]
Participant

Question though,

I don't think it's possible to access a post's id outside the loop. Maybe I'm not understanding you though

Add New Note to this Reply

December 5, 2015 at 3:42 PM #1868

Anh Tran
Keymaster

I mean getting the ID of the post you want to get value for. Inside the loop, you setup global post object and the helper function auto takes its ID. But outside the loop, the helper function doesn't know which post object to take ID, and thus it might output the wrong value.

I'm not sure if that's the case, cause the situation is not 100% clear. That are just my thoughts.

Add New Note to this Reply
Author

Posts

Viewing 5 posts - 1 through 5 (of 5 total)

The topic ‘Can't use wp_query "meta_key" parameter to filter posts’ is closed to new replies.