Changeset 16267 for trunk/wp-includes/taxonomy.php

Timestamp:

11/09/2010 11:30:35 PM (15 years ago)

Author:

scribu

Message:

Make get_tax_sql() a standalone function. See #15032

File:

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

trunk/wp-includes/taxonomy.php

@@ -554 +554 @@
     return $do_query ? $wpdb->get_col( $sql ) : $sql;
 }
+
+/*
+ * Given a meta query, generates SQL to be appended to a main query
+ *
+ * @since 3.1.0
+ *
+ * @param array $tax_query List of taxonomy queries. A single taxonomy query is an associative array:
+ * - 'taxonomy' string|array The taxonomy being queried
+ * - 'terms' string|array The list of terms
+ * - 'field' string (optional) Which term field is being used.
+ *      Possible values: 'term_id', 'slug' or 'name'
+ *      Default: 'slug'
+ * - 'operator' string (optional)
+ *      Possible values: 'IN' and 'NOT IN'.
+ *      Default: 'IN'
+ * - 'include_children' bool (optional) Whether to include child terms.
+ *      Default: true
+ *
+ * @param string $object_id_column
+ * @return string
+ */
+function get_tax_sql( $tax_query, $object_id_column ) {
+    global $wpdb;
+
+    $sql = array();
+    foreach ( $tax_query as $query ) {
+        if ( !isset( $query['include_children'] ) )
+            $query['include_children'] = true;
+
+        $query['do_query'] = false;
+
+        $sql_single = get_objects_in_term( $query['terms'], $query['taxonomy'], $query );
+
+        if ( empty( $sql_single ) )
+            return ' AND 0 = 1';
+
+        $sql[] = $sql_single;
+    }
+
+    if ( 1 == count( $sql ) ) {
+        $ids = $wpdb->get_col( $sql[0] );
+    } else {
+        $r = "SELECT object_id FROM $wpdb->term_relationships WHERE 1=1";
+        foreach ( $sql as $query )
+            $r .= " AND object_id IN ($query)";
+
+        $ids = $wpdb->get_col( $r );
+    }
+
+    if ( !empty( $ids ) )
+        return " AND $object_id_column IN(" . implode( ', ', $ids ) . ")";
+    else
+        return ' AND 0 = 1';
+}
+
 
 /**