MDL-24355 tag: added code to prevent an error if there are no tag correlations found

2011-06-07 17:06:00 +08:00
parent ef7383d32a
commit ab0c861479
1 changed files with 6 additions and 1 deletions
@@ -824,7 +824,12 @@ function tag_compute_correlations($mincorrelation = 2) {
    rs_close($rs);

    // Remove any correlations that weren't just identified
-    delete_records_select('tag_correlation', 'id NOT IN ('.join(',', $correlations).')');
+    if (empty($correlations)) {
+        //there are no correlations so delete any in the database
+        delete_records('tag_correlation');
+    } else {
+        delete_records_select('tag_correlation', 'id NOT IN ('.join(',', $correlations).')');
+    }
 }

 /**