WP_Query bug with product post type with search parameter on

[subrataemfluence]

I am not sure if it is a WordPress core bug, but seems like it! I have 5 different custom post types along with 'product' post type from Woocommerce.

The following query gives (only) product result:

$args = array(
    'post_type' => array('product'),
    'posts_per_page' => 5,
    'post_status' => array('publish', 'future')
);

Actual query output:

SELECT SQL_CALC_FOUND_ROWS wp_posts.ID FROM wp_posts WHERE 1=1 AND wp_posts.post_type = 'product' AND ((wp_posts.post_status = 'publish' OR wp_posts.post_status = 'future')) ORDER BY wp_posts.post_date DESC LIMIT 0, 5

But the following query:

$args = array(
    'post_type' => array('product'),
    's' => 'mobile',
    'posts_per_page' => 5,
    'post_status' => array('publish', 'future')
);

outputs this (even post_type is specified the query is generated to search all other post types and surprisingly not product):

SELECT SQL_CALC_FOUND_ROWS wp_posts.ID FROM wp_posts WHERE 1=1 AND (((wp_posts.post_title LIKE '%htc%') OR (wp_posts.post_excerpt LIKE '%htc%') OR (wp_posts.post_content LIKE '%htc%'))) AND wp_posts.post_type IN ('post', 'travelog', 'hotel-info', 'trips', 'package_tour') AND ((wp_posts.post_status = 'publish' OR wp_posts.post_status = 'future')) ORDER BY wp_posts.post_title LIKE '%htc%' DESC, wp_posts.post_date DESC LIMIT 0, 5

and brings up results from all other post types and simply ignoring product.

[boonebgorges]

There's nothing specific in WP_Query that'd cause the post_type parameter to be changed based on the presence of a search term. I've done some testing and I can't reproduce the behavior. It's likely that what you're seeing is due to a plugin that modifies WP's core search functionality. Please do some debugging by disabling plugins along these lines, and feel free to reopen this ticket if you find evidence directly indicating that this is a core bug.

[subrataemfluence]

Hi @boonebgorges, thank you for looking into my issue. As per your advise I disabled (deactivated) all my plugins. Then created a template page where I put the following code first:

$args = array(
    'post_type' => array('product'),
    'posts_per_page' => 5,
    'post_status' => array('publish', 'future')
);

$q = new WP_Query($args);
echo $q->request;

Here is the output:

SELECT SQL_CALC_FOUND_ROWS wp_posts.ID FROM wp_posts WHERE 1=1 AND wp_posts.post_type = 'product' AND ((wp_posts.post_status = 'publish' OR wp_posts.post_status = 'future')) ORDER BY wp_posts.post_date DESC LIMIT 0, 5

which is exactly what I want!

Now I added the search query part in $args i.e

$args = array(
    'post_type' => array('product'),
    'posts_per_page' => 5,
    's' => 'htc',
    'post_status' => array('publish', 'future')
);

$q = new WP_Query($args);
echo $q->request;

and the output is:

SELECT SQL_CALC_FOUND_ROWS wp_posts.ID FROM wp_posts WHERE 1=1 AND (((wp_posts.post_title LIKE '%htc%') OR (wp_posts.post_excerpt LIKE '%htc%') OR (wp_posts.post_content LIKE '%htc%'))) AND wp_posts.post_type IN ('post', 'travelog', 'hotel-info', 'trips', 'package_tour') AND ((wp_posts.post_status = 'publish' OR wp_posts.post_status = 'future')) ORDER BY wp_posts.post_title LIKE '%htc%' DESC, wp_posts.post_date DESC LIMIT 0, 5

which shows the problem is still there. There is no product post type included in query, rather all other post types are available which I never asked WordPress to include through my above query.

I have ALL plugins deactivated, ready made as well as those I built for this site.

[triskalweiss]

It's possible the exclude_from_search parameter is set to true on the product post type.

[boonebgorges]

It's possible the exclude_from_search parameter is set to true on the product post type.

A good thought - but (a) WooCommerce doesn't set exclude_from_search to true, and (b) even when exclude_from_search=true, WP_Query by itself doesn't change post types based on exclude_from_search. (Primary exclude_from_search filtering happens in WP::parse_request().)

@subrataemfluence I've installed WooCommerce, created some items, and tested the precise code that you've provided, but I was not able to reproduce. The request SQL string, in both cases, contains wp_posts.post_type = 'product'.

I don't have any clear ideas about what might be happening. @subrataemfluence Are you able to dig deeper into WP_Query to see where post_type is getting reset?

[subrataemfluence]

@boonebgorges yes, I am trying the same thing. For this purpose to start with I have just created a new local website with no plugin (so far) in order to test WP_Query. I shall do it after installing WooCommerce and adding a couple of products.

[boonebgorges]

@subrataemfluence Thanks for continuing to look.

To be clear, you must be running at least *one* modification, in addition to WooCommerce: your WP_Query call. How are you doing it? Is it in a theme template? Or in a hook callback? For purposes of testing, I did mine like this:

add_filter( 'the_content', function( $content ) {
    $query = new WP_Query...
} );

[subrataemfluence]

@boonebgorges Sorry, I am not very well-versed with WordPress yet (stepped into in only a few weeks ago) and wasn't aware of the above filer method you mentioned. All I am doing right now is writing my WP_Query in a template page and getting the request as well as the result printed on screen.

It would greatly help if you please tell me what the above filter hook actually does and what difference it has from my template based WP_Query approach.

Meanwhile my test with a brand new site with only Woocommerce and one additional custom post type (hand written plugin based). The result is coming along fine with the same combinations which was causing problems in my actual site.

I am still trying to find out why and where the query is getting overwritten or conflicted in my main site.

UPDATE:
With main site I still have the same issue. However by searching more, I got this, which is similar to my issue (​http://wordpress.stackexchange.com/questions/134537/how-to-make-a-wp-query-search-with-custom-post-types).