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<title>[31366] trunk: In `WP_Query::get_queried_object()`, avoid PHP notices when `is_tax` is paired with an empty `tax_query`.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/31366">31366</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/31366","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>boonebgorges</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2015-02-07 19:49:17 +0000 (Sat, 07 Feb 2015)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>In `WP_Query::get_queried_object()`, avoid PHP notices when `is_tax` is paired with an empty `tax_query`.

It's possible to have an empty `tax_query` and `is_tax=true` when the initial
query contains a taxonomy var (and is processed as such during
`WP_Query::parse_query()`) but the taxonomy var is unset during a 'parse_query'
callback. While this kind of behavior is not necessarily something we need to
support, we should continue to avoid PHP notices in such cases, as we did prior
to WP 4.1.

Fixes <a href="https://core.trac.wordpress.org/ticket/31246">#31246</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesqueryphp">trunk/src/wp-includes/query.php</a></li>
<li><a href="#trunktestsphpunittestsqueryphp">trunk/tests/phpunit/tests/query.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesqueryphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/query.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/query.php   2015-02-07 19:44:13 UTC (rev 31365)
+++ trunk/src/wp-includes/query.php     2015-02-07 19:49:17 UTC (rev 31366)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3900,15 +3900,17 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                // For other tax queries, grab the first term from the first clause.
</span><span class="cx" style="display: block; padding: 0 10px">                                $tax_query_in_and = wp_list_filter( $this->tax_query->queried_terms, array( 'operator' => 'NOT IN' ), 'NOT' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                $queried_taxonomies = array_keys( $tax_query_in_and );
-                               $matched_taxonomy = reset( $queried_taxonomies );
-                               $query = $tax_query_in_and[ $matched_taxonomy ];
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         if ( ! empty( $tax_query_in_and ) ) {
+                                       $queried_taxonomies = array_keys( $tax_query_in_and );
+                                       $matched_taxonomy = reset( $queried_taxonomies );
+                                       $query = $tax_query_in_and[ $matched_taxonomy ];
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                if ( $query['terms'] ) {
-                                       if ( 'term_id' == $query['field'] ) {
-                                               $term = get_term( reset( $query['terms'] ), $matched_taxonomy );
-                                       } else {
-                                               $term = get_term_by( $query['field'], reset( $query['terms'] ), $matched_taxonomy );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 if ( $query['terms'] ) {
+                                               if ( 'term_id' == $query['field'] ) {
+                                                       $term = get_term( reset( $query['terms'] ), $matched_taxonomy );
+                                               } else {
+                                                       $term = get_term_by( $query['field'], reset( $query['terms'] ), $matched_taxonomy );
+                                               }
</ins><span class="cx" style="display: block; padding: 0 10px">                                         }
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span></span></pre></div>
<a id="trunktestsphpunittestsqueryphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/query.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/query.php       2015-02-07 19:44:13 UTC (rev 31365)
+++ trunk/tests/phpunit/tests/query.php 2015-02-07 19:49:17 UTC (rev 31366)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -91,4 +91,35 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertCount( 1, $query->get( 'tag_slug__in' ) );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( $query->get_queried_object(), $tag );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-}
</del><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of file
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+       /**
+        * @ticket 31246
+        */
+       public function test_get_queried_object_should_return_null_when_is_tax_is_true_but_the_taxonomy_args_have_been_removed_in_a_parse_query_callback() {
+               // Don't override the args provided below.
+               remove_action( 'pre_get_posts', array( $this, 'pre_get_posts_tax_category_tax_query' ) );
+               register_taxonomy( 'wptests_tax', 'post' );
+               $terms = $this->factory->term->create_many( 2, array(
+                       'taxonomy' => 'wptests_tax',
+               ) );
+
+               $posts = $this->factory->post->create_many( 2 );
+
+               wp_set_object_terms( $posts[0], array( $terms[0] ), 'wptests_tax' );
+               wp_set_object_terms( $posts[1], array( $terms[1] ), 'wptests_tax' );
+
+               add_action( 'parse_query', array( $this, 'filter_parse_query_to_remove_tax' ) );
+               $q = new WP_Query( array(
+                       'fields' => 'ids',
+                       'wptests_tax' => $terms[1],
+               ) );
+
+               remove_action( 'parse_query', array( $this, 'filter_parse_query_to_remove_tax' ) );
+
+               $this->assertNull( $q->get_queried_object() );
+       }
+
+       public function filter_parse_query_to_remove_tax( $q ) {
+               unset( $q->query_vars['wptests_tax'] );
+       }
+}
</ins></span></pre>
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