Ticket #30335: 30335.5.patch

src/wp-includes/category-template.php

@@ -402 +402 @@
                         $output .= "\t<option value='" . esc_attr( $option_none_value ) . "'$selected>$show_option_none</option>\n";
                 }
 
+                if ( $r['selected'] ) {
+                        // Check if the 'selected' term was split
+                        $selected_term = get_term( $r['selected'], $r['taxonomy'] );
+                        if ( $selected_term && ! is_wp_error( $selected_term ) && intval( $r['selected'] ) != $selected_term->term_id ) {
+                                $r['selected'] = $selected_term->term_id;
+                        }
+                }
+
                 if ( $r['hierarchical'] ) {
                         $depth = $r['depth'];  // Walk the full depth.
                 } else {

src/wp-includes/taxonomy.php

@@ -1233 +1233 @@
                                 " );
                                 break;
                         default:
-                                $terms = implode( ',', array_map( 'intval', $query['terms'] ) );
+                                $terms = $query['terms'];
+
+                                // If any passed term_ids were previously split, substitute the correct term_id.
+                                foreach ( $terms as $term_index => $term_id ) {
+                                        if ( $split_term = _get_split_term( $term_id, $query['taxonomy'] ) ) {
+                                                $terms[ $term_index ] = $split_term;
+                                        }
+                                }
+
+                                $terms = implode( ',', array_map( 'intval', $terms ) );
+
                                 $terms = $wpdb->get_col( "
                                         SELECT $resulting_field
                                         FROM $wpdb->term_taxonomy
@@ -1315 +1325 @@
                         return null;
                 if ( ! $_term = wp_cache_get( $term, $taxonomy . ':terms:' . $incrementor ) ) {
                         $_term = $wpdb->get_row( $wpdb->prepare( "SELECT t.*, tt.* FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy = %s AND t.term_id = %d LIMIT 1", $taxonomy, $term) );
+
+                        // If no term is found, check whether this was a previously split term.
+                        if ( ! $_term && $old_term_id = _get_split_term( $term, $taxonomy ) ) {
+                                return get_term( $old_term_id, $taxonomy, $output, $filter );
+                        }
+
                         if ( ! $_term )
                                 return null;
                         wp_cache_add( $term, $_term, $taxonomy . ':terms:' . $incrementor );
@@ -1675 +1691 @@
          */
         $args = apply_filters( 'get_terms_args', $args, $taxonomies );
 
+        /*
+         * For parameters that accept term_ids, check to see whether any of the IDs passed to the parameter correspond
+         * to previously split taxonomy terms. If so, swap out the old term_id for the new one, so the query matches.
+         */
+        $term_id_params = array( 'exclude', 'exclude_tree', 'include', 'parent', 'child_of' );
+        foreach ( $term_id_params as $term_id_param ) {
+                if ( empty( $args[ $term_id_param ] ) ) {
+                        continue;
+                }
+
+                $param_is_array = is_array( $args[ $term_id_param ] );
+
+                $passed_term_ids = (array) $args[ $term_id_param ];
+                foreach ( $passed_term_ids as $passed_term_index => $passed_term_id ) {
+                        foreach ( $taxonomies as $taxonomy ) {
+                                if ( $split_term = _get_split_term( $passed_term_id, $taxonomy ) ) {
+                                        $passed_term_ids[ $passed_term_index ] = $split_term;
+                                        continue 2;
+                                }
+                        }
+                }
+
+                if ( $param_is_array ) {
+                        $args[ $term_id_param ] = $passed_term_ids;
+                } else {
+                        $args[ $term_id_param ] = $passed_term_ids[0];
+                }
+        }
+
         $child_of = $args['child_of'];
         if ( $child_of ) {
                 $hierarchy = _get_term_hierarchy( reset( $taxonomies ) );
@@ -3903 +3948 @@
 }
 
 /**
+ * Look up a previously split taxonomy term by its old term_id.
+ *
+ * Terms that have been split by _split_shared_term() are stored, so that
+ * attempts to retrieve terms by the previous term_id still work.
+ *
+ * @since 4.1.0
+ * @access private
+ *
+ * @param int    $old_term_id Old, pre-split term_id.
+ * @param string $taxonomy    Taxonomy name.
+ */
+function _get_split_term( $old_term_id, $taxonomy ) {
+        $split_terms = get_option( '_split_terms_' . $taxonomy );
+
+        return ! empty( $split_terms[ $old_term_id ] ) ? $split_terms[ $old_term_id ] : null;
+}
+
+/**
  * Add count of children to parent count.
  *
  * Recalculates term counts by including items from child terms. Assumes all
@@ -4115 +4178 @@
                 clean_term_cache( $term_id, $shared_term_taxonomy );
         }
 
+        // Keep a record of term_ids that have been split, keyed by old term_id.
+        $split_term_data = get_option( '_split_terms_' . $term_taxonomy->taxonomy, array() );
+        $split_term_data[ $term_id ] = $new_term_id;
+        if ( false === get_option( '_split_terms_' . $term_taxonomy->taxonomy, false ) ) {
+                add_option( '_split_terms_' . $term_taxonomy->taxonomy, $split_term_data, '', 'no' );
+        } else {
+                update_option( '_split_terms_' . $term_taxonomy->taxonomy, $split_term_data );
+        }
+
         /**
          * Fires after a previously shared taxonomy term is split into two separate terms.
          *

tests/phpunit/tests/term/splitSharedTerm.php

@@ -4 +4 @@
  * @group taxonomy
  */
 class Tests_Term_SplitSharedTerm extends WP_UnitTestCase {
-        protected $tt_ids = array();
+        protected $terms = array();
 
         public function setUp() {
                 global $wpdb;
@@ -40 +40 @@
                         'parent' => $t1['term_id'],
                 ) );
 
-                $this->tt_ids = array(
-                        't1' => $t1['term_taxonomy_id'],
-                        't2' => $t2['term_taxonomy_id'],
-                        't3' => $t3['term_taxonomy_id'],
-                        't2_child' => $t2_child['term_taxonomy_id'],
+                $this->terms = array(
+                        't1' => $t1,
+                        't2' => $t2,
+                        't3' => $t3,
+                        't2_child' => $t2_child,
                 );
 
                 _split_shared_term( $t1['term_id'], $t2['term_taxonomy_id'] );
@@ -55 +55 @@
          * @ticket 5809
          */
         public function test_should_create_new_term_ids() {
-                $t1_term = get_term_by( 'term_taxonomy_id', $this->tt_ids['t1'], 'wptests_tax' );
-                $t2_term = get_term_by( 'term_taxonomy_id', $this->tt_ids['t2'], 'wptests_tax_2' );
-                $t3_term = get_term_by( 'term_taxonomy_id', $this->tt_ids['t3'], 'wptests_tax_3' );
+                $t1_term = get_term_by( 'term_taxonomy_id', $this->terms['t1']['term_taxonomy_id'], 'wptests_tax' );
+                $t2_term = get_term_by( 'term_taxonomy_id', $this->terms['t2']['term_taxonomy_id'], 'wptests_tax_2' );
+                $t3_term = get_term_by( 'term_taxonomy_id', $this->terms['t3']['term_taxonomy_id'], 'wptests_tax_3' );
 
                 $this->assertNotEquals( $t1_term->term_id, $t2_term->term_id );
                 $this->assertNotEquals( $t1_term->term_id, $t3_term->term_id );
@@ -68 +68 @@
          * @ticket 5809
          */
         public function test_should_retain_child_terms_when_using_get_terms_parent() {
-                $t2_term = get_term_by( 'term_taxonomy_id', $this->tt_ids['t2'], 'wptests_tax_2' );
+                $t2_term = get_term_by( 'term_taxonomy_id', $this->terms['t2']['term_taxonomy_id'], 'wptests_tax_2' );
                 $children = get_terms( 'wptests_tax_2', array(
                         'parent' => $t2_term->term_id,
                         'hide_empty' => false,
                 ) );
 
-                $this->assertEquals( $this->tt_ids['t2_child'], $children[0]->term_taxonomy_id );
+                $this->assertEquals( $this->terms['t2_child']['term_taxonomy_id'], $children[0]->term_taxonomy_id );
         }
 
         /**
          * @ticket 5809
          */
         public function test_should_retain_child_terms_when_using_get_terms_child_of() {
-                $t2_term = get_term_by( 'term_taxonomy_id', $this->tt_ids['t2'], 'wptests_tax_2' );
+                $t2_term = get_term_by( 'term_taxonomy_id', $this->terms['t2']['term_taxonomy_id'], 'wptests_tax_2' );
                 $children = get_terms( 'wptests_tax_2', array(
                         'child_of' => $t2_term->term_id,
                         'hide_empty' => false,
                 ) );
 
-                $this->assertEquals( $this->tt_ids['t2_child'], $children[0]->term_taxonomy_id );
+                $this->assertEquals( $this->terms['t2_child']['term_taxonomy_id'], $children[0]->term_taxonomy_id );
         }
 
         /**
@@ -121 +121 @@
                 $t2_children = get_term_children( $t2['term_id'], 'wptests_tax_4' );
                 $this->assertEquals( array( $new_term_id ), $t2_children );
         }
+
+        /**
+         * @ticket 30335
+         */
+        public function test_should_remain_available_at_old_term_id_using_get_term_by() {
+                $t2_term = get_term_by( 'term_taxonomy_id', $this->terms['t2']['term_taxonomy_id'], 'wptests_tax_2' );
+
+                $this->assertEquals( $t2_term, get_term_by( 'id', $this->terms['t1']['term_id'], 'wptests_tax_2' ) );
+        }
+
+        /**
+         * @ticket 30335
+         */
+        public function test_should_remain_available_at_old_term_id_using_get_term() {
+                $t2_term = get_term_by( 'term_taxonomy_id', $this->terms['t2']['term_taxonomy_id'], 'wptests_tax_2' );
+
+                $this->assertEquals( $t2_term, get_term( intval( $this->terms['t1']['term_id'] ), 'wptests_tax_2' ) );
+        }
+
+        /**
+         * @ticket 30335
+         */
+        public function test_should_remain_available_at_old_term_id_using_get_terms_with_parent_param() {
+                $found = get_terms( 'wptests_tax_2', array(
+                        'parent' => $this->terms['t1']['term_id'],
+                        'hide_empty' => false,
+                ) );
+                $this->assertEquals( $this->terms['t2_child']['term_id'], $found[0]->term_id );
+        }
+
+        /**
+         * @ticket 30335
+         */
+        public function test_should_remain_available_at_old_term_id_using_get_terms_with_include_param() {
+                $t2_term = get_term_by( 'term_taxonomy_id', $this->terms['t2']['term_taxonomy_id'], 'wptests_tax_2' );
+
+                $found = get_terms( 'wptests_tax_2', array(
+                        'include' => array( $this->terms['t1']['term_id'] ),
+                        'hide_empty' => false,
+                ) );
+                $this->assertEquals( $t2_term->term_id, $found[0]->term_id );
+        }
+
+        /**
+         * @ticket 30335
+         */
+        public function test_should_remain_available_at_old_term_id_using_tax_query() {
+                $t2_term = get_term_by( 'term_taxonomy_id', $this->terms['t2']['term_taxonomy_id'], 'wptests_tax_2' );
+
+                $tq = new WP_Tax_Query( array(
+                        array(
+                                'field' => 'term_id',
+                                'taxonomy' => 'wptests_tax_2',
+                                'terms' => array( $this->terms['t1']['term_id'] ),
+                        ),
+                ) );
+                $tq->transform_query( $tq->queries[0], 'term_taxonomy_id' );
+
+                $this->assertEquals( array( $t2_term->term_taxonomy_id ), $tq->queries[0]['terms'] );
+        }
+
+        /**
+         * @ticket 30335
+         */
+        public function test_should_remain_available_at_old_term_id_using_wp_dropdown_categories() {
+                $t2_term = get_term_by( 'term_taxonomy_id', $this->terms['t2']['term_taxonomy_id'], 'wptests_tax_2' );
+                $terms = get_terms( 'wptests_tax_2', array( 'hide_empty' => false ) );
+                $dropdown = wp_dropdown_categories( array(
+                        'echo'       => false,
+                        'taxonomy'   => 'wptests_tax_2',
+                        'hide_empty' => false,
+                        'selected'   => $this->terms['t1']['term_id'],
+                ) );
+
+                $this->assertRegExp( "/<option[^>]+value=\"{$t2_term->term_id}\" selected=\"selected\">/", $dropdown );
+        }
 }