Changeset 31792 for trunk/src/wp-includes/taxonomy.php

Timestamp:

03/16/2015 11:15:34 AM (10 years ago)

Author:

boonebgorges

Message:

In wp_insert_term(), allow a term with an existing name if a unique $slug has been provided.

wp_insert_term() protects against the creation of terms with duplicate names
at the same level of a taxonomy hierarchy. However, it's historically been
possible to override this protection by explicitly providing a value of $slug
that is unique at the hierarchy tier. This ability was broken in [31734], and
the current changeset restores the original behavior.

A number of unit tests are added and refactored in support of these changes.

See #17689 for discussion of a fix that was superceded by [31734]. This commit
retains the fix for the underlying bug described in that ticket.

See #31328.

File:

• trunk/src/wp-includes/taxonomy.php (modified) (1 diff)

trunk/src/wp-includes/taxonomy.php

@@ -2904 +2904 @@
     }
 
-    // Terms with duplicate names are not allowed at the same level of a taxonomy hierarchy.
-    if ( $existing_term = get_term_by( 'name', $name, $taxonomy ) ) {
-        if ( is_taxonomy_hierarchical( $taxonomy ) ) {
-            $siblings = get_terms( $taxonomy, array( 'fields' => 'names', 'get' => 'all', 'parent' => $parent ) );
-            if ( in_array( $name, $siblings ) ) {
-                return new WP_Error( 'term_exists', __( 'A term with the name already exists with this parent.' ), $existing_term->term_id );
+    /*
+     * Prevent the creation of terms with duplicate names at the same level of a taxonomy hierarchy,
+     * unless a unique slug has been explicitly provided.
+     */
+    if ( $name_match = get_term_by( 'name', $name, $taxonomy ) ) {
+        $slug_match = get_term_by( 'slug', $slug, $taxonomy );
+        if ( ! $slug_provided || $name_match->slug === $slug || $slug_match ) {
+            if ( is_taxonomy_hierarchical( $taxonomy ) ) {
+                $siblings = get_terms( $taxonomy, array( 'get' => 'all', 'parent' => $parent ) );
+
+                $existing_term = null;
+                if ( $name_match->slug === $slug && in_array( $name, wp_list_pluck( $siblings, 'name' ) ) ) {
+                    $existing_term = $name_match;
+                } elseif ( $slug_match && in_array( $slug, wp_list_pluck( $siblings, 'slug' ) ) ) {
+                    $existing_term = $slug_match;
+                }
+
+                if ( $existing_term ) {
+                    return new WP_Error( 'term_exists', __( 'A term with the name already exists with this parent.' ), $existing_term->term_id );
+                }
+            } else {
+                return new WP_Error( 'term_exists', __( 'A term with the name already exists in this taxonomy.' ), $name_match->term_id );
             }
-        } else {
-            return new WP_Error( 'term_exists', __( 'A term with the name already exists in this taxonomy.' ), $existing_term->term_id );
         }
     }