Refers to a hook in WordPress Core that can be used to alter the results returned by a WP_Query based database query.

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86
votes
4answers
67k views

When to use WP_query(), query_posts() and pre_get_posts

I read @nacin's You don't know Query yesterday and was sent down a bit of a querying rabbit hole. Before yesterday, I was (wrongly) using query_posts() for all my querying needs. Now I'm a little bit ...
19
votes
3answers
3k views

Should I use Pre Get Posts or WP_Query

I have the following query which I call in my taxonomy.php template via query_brands_geo('dealers', 'publish', '1', $taxtype, $geo, $brands); This function works perfectly. However after reading ...
13
votes
2answers
3k views

Using pre_get_posts with WP_Query

I was reading Stephen Harris's excellent answer to this question regarding the use of WP_query(), query_posts() and pre_get_posts. He says "pre_get_posts is a filter, for altering any query. It is ...
12
votes
2answers
2k views

Sticky Posts exceed posts per page limit

I'm using pre_get_posts to adjust the number of posts displayed on my homepage. function lifelounge_query_adjust( $query ) { if ( is_home() ) { set_query_var( 'posts_per_page', 12 ); ...
10
votes
3answers
4k views

Modify Taxonomy pages to exclude items in child taxonomies

I found this question: Theres a way to use $query->set('tax_query' in pre_get_posts filter? which seems to indicate that yes, you can alter the taxonomy query on taxonomy archives via ...
7
votes
2answers
11k views

Theres a way to use $query->set('tax_query' in pre_get_posts filter?

Theres a way to use $query->set('tax_query', ...) in pre_get_posts filter? for example next code is not altering the query. Note that I'm building $taxonomies from and custom search. function ...
7
votes
2answers
2k views

What is “main query”? [duplicate]

Possible Duplicate: How to know which one is the main query? I'm curious to know what is the so called "main query"? What I have is two queries on front page. if (have_posts()) : while ...
7
votes
7answers
4k views

Sort on meta value but include posts that don't have one

I've been modifying the built in WP search using the pre_get_posts filter, allowing the user to sort the posts (including a bunch of custom post types) by different fields. The problem I'm having ...
6
votes
1answer
72 views

How to add taxonomy filter on the query fly?

I try to add tax query on pre_get_posts hook using following code : // Add custom posts to main query (archive and home) add_action( 'pre_get_posts', 'add_post_types_to_query' ); function ...
6
votes
2answers
3k views

Media library to list images only user uploaded

I want to list images for only user uploaded image. Here is the scenario: Using the image uploader on front end using iframe. I have added upload_files cap to subscriber level users and want them ...
6
votes
2answers
456 views

sort child pages on admin

I have a hierarchical CPT with the following structure: - parent item 1 - child item 1 - child item 2 - child item 3 - child item 4 - child item 5 - parent item 2 - child item 1 ...
5
votes
3answers
5k views

Can I exclude a post by meta key using pre_get_posts function?

I see many people prefer to use pre_get_posts hook instead of query_posts. The code below works and shows all posts which have meta key "featured" function featured_posts( $query ) { if ( ...
5
votes
3answers
1k views

Using meta_query on pre_get_posts to exclude a particular meta_key value

I have a simple filter running on the main query on the front page, it should be excluding all posts with a particular meta value (by only including posts who do not have the meta_key set, or those ...
5
votes
1answer
106 views

complex restriction of items in media library

I have a need to limit items in the media library for users without a specific capability. There are a lot of examples out there for how to limit them to only items that a given user has uploaded, ...
4
votes
1answer
1k views

is_category() in pre_get_posts strange error

I have a function that sets posts_per_page option depending on the category viewed. I discovered and error which I can't really understand: first this is how I get the error: function ...
4
votes
1answer
631 views

How-to exclude terms from the main query the most performant way?

This Q is a follow up to this answer on the Q: "How to exclude a specific term for the search?". 4 ways to filter out posts that have a specific term Type | Pro | ...
4
votes
1answer
2k views

Changing the meta_query of the main query based on custom query_vars and using pre_get_posts

I've registered custom rewrite rules and query_vars to use for displaying a list of events based on ISO date format. For example when a user requests the URL, http://site.com/by-date/2013-04-04/, my ...
4
votes
1answer
267 views

How to uniquely identify queries?

Today I was thinking about how to differentiate queries, mainly to create an unique identifier. In the process I played around a bit, see below code. The main idea is to do it depending on the ...
3
votes
3answers
2k views

Archive Listings Filtered by Date Values in a Custom Field/Post Meta?

(Moderator's Note: The original title was "using archive by date with a custom date") I'm adding an additional date to posts as a custom field. Now I want the archive to show posts by the custom date ...
3
votes
2answers
1k views

pre_get_posts OR relation between taxonomy and author

I have a custom taxonomy called coauthor. On the edit.php screen, I am trying filter and only show posts authored by the current user OR posts coauthored by the current user. I can get the posts ...
3
votes
1answer
851 views

Using is_main_query to select custom post type on certain page

I've been trying to implement some of the ideas discussed by Andrew Nacin http://wordpress.tv/2012/06/15/andrew-nacin-wp_query/ into my workflow, specifically trying to move away from using ...
3
votes
1answer
2k views

Search ONLY by meta key / meta values

I'm almost there on this one. On functions.php i have this: function base_home_product_post_type( $query ) { if($query->is_search() && $_POST['box'] == 'sku') { ...
3
votes
3answers
584 views

How would I use pre_get_posts to query another site for posts in my multisite network?

I have a multisite network of sites which should display blog content from each other if the blog post has a tag with the site name. To gather all posts within the network I use the SWT (Sitewide ...
3
votes
2answers
217 views

How to target the default Recent Posts and Recent Comments widgets with pre_get_posts?

I added the following to my functions.php: add_action('pre_get_posts', 'keyl_get_emp_posts'); function keyl_get_emp_posts($query) { if ($query->is_main_query()) ...
2
votes
1answer
1k views

Adding meta_key via pre_get_posts causes navigation to disappear

I'm writing a custom function that allows the posts to be sorted based on a custom field. When the user submits the "sort by" form, the meta_key (as well as orderby and order) parameters by which the ...
2
votes
2answers
3k views

Include and Exclude Taxonomies From Archives & Feeds Using 'pre_get_posts'

What I am trying to do? My blog uses a custom taxonomy called edition with terms like us-canada (6), eu (7) and india (8) -- term slug (ID). I want to make sure that posts not assigned to any ...
2
votes
2answers
1k views

“pre_get_posts” firing on every query

How can I change arguments for the main query only, and not affect other queries? add_filter('pre_get_posts', 'custom_post_count'); function custom_post_count($query){ ...
2
votes
1answer
3k views

pre get posts changing the query

i need to change the posts in taxonomy.php page. I have a meta_key which i want to compare to meta value. But currently my code is not returning anything. I am sure i am missing something. Please let ...
2
votes
1answer
591 views

WP_Post_List_Table::get_views - Have post counts account for filters?

Toward the top of the edit.php screens there is a list that displays post statuses along with the post count. I believe this is generated by WP_Post_List_Table::get_views. For example All (7) | ...
2
votes
2answers
4k views

Prevent pre_get_posts filter on specific post type

I am running into one issue with pre_get_post filter. Actually I have 4 post types. Post, Pages, Events, and Venue. I created one custom field called city for event and venue post type. When ...
2
votes
1answer
1k views

Create multiple Search functions for posts / custom post types and everything

I'm currently working on a search function in a wp site. The plan is to have a search function on the news page which just searches posts. I'm achieving this by adding the below to my functions.php ...
2
votes
2answers
104 views

How to create an archive for all posts that do not have a post format?

The title says it all. I need working pagination, correct post count etc. Basically a new page for posts but with a filter for post formats. Things I have tried so far: 1) Created a new rewrite rule ...
2
votes
2answers
358 views

Splitting the main query in multiple loops with query_posts and/or pre_get_posts?

I have a custom post type 'events', to which I have associated a custom taxonomy 'calendar'. The calendar has 12 fixed terms, for each month of the year ( 'august', 'october', 'november, etc.). I'm ...
2
votes
1answer
142 views

Changing Posts Per Page and offset with pre_get_posts

I have a filter using pre_get_posts to change the number of posts per page from 4 on the news landing page to 8 on all other pages (page 2, 3, etc). However I don't seem to have got the offset ...
2
votes
3answers
70 views

Change of query var in pre_get_posts not maintained

I'm creating a plugin that adds a custom feed. I am using a pre_get_posts filter to change the posts_per_page query var to -1 (to get all items of a custom post type). However, if I dump the $wp_query ...
2
votes
1answer
553 views

Order posts by (hierarchical custom) taxonomy terms and term children

The scenario a custom post type wiki a (hierarchical) custom taxonomy topics a page template archive-wiki.php The situation Posts show up and get ordered by post_date (which is the default). The ...
2
votes
1answer
2k views

pre_get_posts on a page

Is it possible to edit the main query on a page using the pre_get_posts filter? I tried but it doesn't seem to work. function pre_wp_queries( $query ) { // only trigger on main qyery if ( ...
2
votes
1answer
361 views

Getting the different post statuses + count like in edit.php, in a custom submenu page

I'm trying to create a submenu page for reordering posts/pages. Right now I'm trying to include the list that display the different post statuses, for example: All (5) | Published (4) | Draft (1) I ...
2
votes
1answer
1k views

Custom search filter causes menu and query_posts problems

I'm using a custom search filter (using my custom query var type), like so: function fteh_pre_get_posts( $query ){ if( isset( $query->query_vars['type'] ) ) $types = explode( ',', ...
2
votes
2answers
41 views

Limiting number of custom posts shown on taxonomy page

I am using a custom post type that uses two taxonomies "colour" and "style". I have a script (from this thread) which groups them together so when you are on a colour taxonomy page they are grouped by ...
2
votes
1answer
101 views

Conditional tag for all categories of a custom post type

I need a conditional tag which returns true on all categories added to a specific custom post type. Tried dozens of variations using the conditional tags from the Codex but still stuck. What i'm ...
2
votes
1answer
389 views

Using database meta_values to calculate new post order using pre_get_posts or a 'request' hook

UPDATE: I have worked out my implementation of the selected answer at the bottom of this post. I'm implementing a sorting algorithm based on Reddit's hotness algorithm, in addition to a time-decay ...
2
votes
1answer
185 views

Custom post type with tags

My understanding is, that custom post types can share tags with the posts also. I have created tags and applied them to a blog post and a custom post type. Yet when I click on a tag it only returns ...
2
votes
1answer
47 views

Sorting posts that has a meta value first then the rest of the posts

Im using the pre_get_posts hook to customize my query for a custom post type archive. Some of the posts for this custom post type have a meta key mp_micropub_accredited with the meta value of 1 and ...
2
votes
1answer
107 views

Including only current user's posts in search

I am a new WP plugin developer. I want the search page to include only the current user's posts. I first added a new capability read_others_posts to only administrators and editors. Then I tried the ...
2
votes
1answer
543 views

Pre_get_posts Gives 404 on Custom Post Type

I'm trying to filter the query on a sub page called "Ask Question" to list all of the recent questions submitted by users, but I get a 404 when going to the page. Flushing the permalink structure did ...
2
votes
1answer
123 views

When querying a combination of posts and other meta fields, is there a better solution than directly modifying the WHERE value?

This question is a follow up to a question I recently asked. I've implemented what seemed to be the only solution, and it seems to work (YAY!). I just need to verify that: This is really the only ...
1
vote
1answer
2k views

How to get my Custom Post Type to display in Recent Posts using “pre_get_posts”

I created a Custom Post Type (call it "my-post-type"). I created an archive-my-post-type.php page for displaying all the Custom Post Types. Looking at the "Recent Posts" section of the Sidebar, I ...
1
vote
2answers
2k views

Sort custom-posts in archive.php via meta-key?

this question is strongly related to this question where I already got a working answer. I have a custom-post-template named "wr_event" and a custom-taxonomy named "event_type". This "event-posts" ...
1
vote
1answer
3k views

Custom Table Column Sortable by Taxonomy Query

I am looking to add a custom column to a custom post type post listing table in the dashboard. I have read many questions / answers on WPSE, along with this article. Although, it seems like everyone ...