Ticket #29181: 29181.patch

src/wp-includes/taxonomy.php

@@ -640 +640 @@
          *              Possible values: 'term_id', 'slug', 'name', or 'term_taxonomy_id'
          *              Default: 'term_id'
          * - 'operator' string (optional)
-         *              Possible values: 'AND', 'IN' or 'NOT IN'.
+         *              Possible values: 'AND', 'IN', 'NOT IN', 'EXISTS', 'NOT EXISTS'
          *              Default: 'IN'
          * - 'include_children' bool (optional) Whether to include child terms. Requires that a taxonomy be specified.
          *              Default: true
@@ -798 +798 @@
                                         WHERE term_taxonomy_id IN ($terms)
                                         AND object_id = $primary_table.$primary_id_column
                                 ) = $num_terms";
+                        } elseif ( 'NOT EXISTS' === $operator || 'EXISTS' === $operator ) {
+
+                                $taxonomy = esc_sql( $query['taxonomy'] );
+
+                                $where[] = "$operator (
+                                        SELECT 1
+                                        FROM $wpdb->term_relationships
+                                        INNER JOIN $wpdb->term_taxonomy
+                                        ON $wpdb->term_taxonomy.term_taxonomy_id = $wpdb->term_relationships.term_taxonomy_id
+                                        WHERE $wpdb->term_taxonomy.taxonomy = '$taxonomy'
+                                        AND $wpdb->term_relationships.object_id = $primary_table.$primary_id_column
+                                )";
                         }
 
                         $i++;

tests/phpunit/tests/term/query.php

@@ -231 +231 @@
                 $q6 = get_posts( array( 'tag_slug__in' => array() ) );
                 $this->assertNotEmpty( $q6 );
         }
+
+        public function test_operator_not_exists() {
+                $c1 = $this->factory->category->create();
+                $t1 = $this->factory->term->create( array( 'taxonomy' => 'post_tag', 'name' => 'foo' ) );
+                $t2 = $this->factory->term->create( array( 'taxonomy' => 'post_tag', 'name' => 'bar' ) );
+
+                $p1 = $this->factory->post->create();
+                $p2 = $this->factory->post->create();
+                $p3 = $this->factory->post->create();
+
+                wp_set_object_terms( $p1, array( $c1 ), 'category' );
+                wp_set_object_terms( $p2, array( $t1 ), 'post_tag' );
+                wp_set_object_terms( $p3, array( $t1 ), 'post_tag' );
+                wp_set_object_terms( $p3, array( $t2 ), 'post_tag' );
+
+                $found1 = $this->q->query( array(
+                        'fields' => 'ids',
+                        'orderby' => 'ID',
+                        'order' => 'ASC',
+                        'tax_query' => array(
+                                array(
+                                        'taxonomy' => 'post_tag',
+                                        'operator' => 'NOT EXISTS',
+                                ),
+                        ),
+                ) );
+
+                $this->assertSame( array( $p1 ), $found1 );
+        }
+
+        public function test_operator_exists() {
+                $c1 = $this->factory->category->create();
+                $t1 = $this->factory->term->create( array( 'taxonomy' => 'post_tag', 'name' => 'foo' ) );
+                $t2 = $this->factory->term->create( array( 'taxonomy' => 'post_tag', 'name' => 'bar' ) );
+                $p1 = $this->factory->post->create();
+                $p2 = $this->factory->post->create();
+                $p3 = $this->factory->post->create();
+
+                wp_set_object_terms( $p1, array( $c1 ), 'category' );
+                wp_set_object_terms( $p2, array( $t1 ), 'post_tag' );
+                wp_set_object_terms( $p3, array( $t1 ), 'post_tag' );
+                wp_set_object_terms( $p3, array( $t2 ), 'post_tag' );
+
+                $found1 = $this->q->query( array(
+                        'fields' => 'ids',
+                        'orderby' => 'ID',
+                        'order' => 'ASC',
+                        'tax_query' => array(
+                                array(
+                                        'taxonomy' => 'post_tag',
+                                        'operator' => 'EXISTS',
+                                ),
+                        ),
+                ) );
+
+                $this->assertSame( array( $p2, $p3 ), $found1 );
+        }
 }