Ticket #15581: garyc40-15581.patch

wp-admin/includes/taxonomy.php

@@ -117 +117 @@
         if ( $parent < 0 )
                 $parent = 0;
 
-        if ( empty($parent) || !category_exists( $parent ) || ($cat_ID && cat_is_ancestor_of($cat_ID, $parent) ) )
+        if ( empty( $parent ) || ! term_exists( $parent, $taxonomy ) || ( $cat_ID && term_is_ancestor_of( $cat_ID, $parent, $taxonomy ) ) )
                 $parent = 0;
 
         $args = compact('name', 'slug', 'parent', 'description');

wp-includes/category.php

@@ -207 +207 @@
  * @return bool Whether $cat2 is child of $cat1
  */
 function cat_is_ancestor_of( $cat1, $cat2 ) {
-        if ( ! isset($cat1->term_id) )
-                $cat1 = &get_category( $cat1 );
-        if ( ! isset($cat2->parent) )
-                $cat2 = &get_category( $cat2 );
-
-        if ( empty($cat1->term_id) || empty($cat2->parent) )
-                return false;
-        if ( $cat2->parent == $cat1->term_id )
-                return true;
-
-        return cat_is_ancestor_of( $cat1, get_category( $cat2->parent ) );
+        return term_is_ancestor_of( $cat1, $cat2, 'category' );
 }
 
 

wp-includes/taxonomy.php

@@ -1431 +1431 @@
 }
 
 /**
+ * Check if a term is an ancestor of another term.
+ *
+ * You can use either an id or the term object for both parameters. If you
+ * use an integer the term will be retrieved.
+ *
+ * @since 3.2.0
+ *
+ * @param int|object $term1 ID or object to check if this is the parent term.
+ * @param int|object $term2 The child term.
+ * @param string $taxonomy Taxonomy name that $term1 and $term2 belong to.
+ * @return bool Whether $term2 is child of $term1
+ */
+function term_is_ancestor_of( $term1, $term2, $taxonomy ) {
+        if ( ! isset($term1->term_id) )
+                $term1 = &get_term( $term1, $taxonomy );
+        if ( ! isset($term2->parent) )
+                $term2 = &get_term( $term2, $taxonomy );
+
+        if ( empty($term1->term_id) || empty($term2->parent) )
+                return false;
+        if ( $term2->parent == $term1->term_id )
+                return true;
+
+        return term_is_ancestor_of( $cat1, get_term( $cat2->parent, $taxonomy ) );
+}
+
+/**
  * Sanitize Term all fields.
  *
  * Relys on sanitize_term_field() to sanitize the term. The difference is that