--- a/develop/models/extractapp.php	Fri Feb 20 16:39:08 2015 +0100
+++ b/develop/models/extractapp.php	Fri Feb 20 17:57:02 2015 +0100
@@ -475,16 +475,29 @@
     }
     
     // === for manage tag list ===
-    public function EditTaglist() {
-        // $this->Initialize($urlvalues);
-        $result = $this->GetTaglist();
+    public function EditTaglist($_postdata) {
+        
+        $topic_id = $_postdata['topic_id'];
+        $result = $this->GetTaglistByTopicID($topic_id);
+
+        $taglistArray = array();
+        foreach ($result as $row) {
+            $taglistArray[$row[0]] = array($row[1], $row[2], $row[3]);
+            //$taglistArray[$row['id']] = array($row['name'], $row['tag'], $row['color']);
+            // TODO: the format is not good, so I use $row[0], $row[1],... This could be changed some time.
+        }
+
+        /*
+        //$result = $this->GetTaglist();
         $taglistArray = array();
         while ($row = mysql_fetch_assoc($result)) {
             $taglistArray[$row['id']] = array($row['name'], $row['tag'], $row['color']);
         }
+        */
 
         $data = array();
         $data['taglistArray'] = $taglistArray;
+        $data['topic_id'] = $topic_id;
         return $data;
        
     }
@@ -515,6 +528,17 @@
                                 $this->GetSQLValueString($color, "text"),
                                 $this->GetSQLValueString($this->systemNAME, "text"));
             $result1 = mysql_query($query1);
+
+
+            // add it to topic_tag_relation table
+            $topic_id = $postdata['topic_id'];
+            
+            // tag_id is $id;
+            $query = sprintf("INSERT INTO `topic_tag_relation` (`topic_id`,`tag_id`) VALUES (%s,%s)", $topic_id, $id);
+            $result = mysql_query($query);
+            if (!$result) {
+                echo json_encode("error when insert into topic_tag_relation table");
+            }
         }
 
     }