diff --git a/lib/dao/dao.class.php b/lib/dao/dao.class.php
index 81193aeab2..25fcd2b9cd 100755
--- a/lib/dao/dao.class.php
+++ b/lib/dao/dao.class.php
@@ -240,6 +240,24 @@ class dao
         return $this;
     }
 
+    /**
+     * The count method, call sql::select() and from().
+     * use as $this->dao->count(TABLE_BUG)->where('')->fetch('count');
+     *
+     * @param  int    $tabel 
+     * @access public
+     * @return void
+     */
+    public function count($table)
+    {
+        $this->setMode('raw');
+        $this->setMethod('select');
+        $this->sqlobj = sql::select('count(*) as count');
+        $this->setTable($table);
+        $this->sqlobj->from($table);
+        return $this;
+    }
+
     /**
      * The select method, call sql::update().
      * 
diff --git a/module/admin/control.php b/module/admin/control.php
index 6b423dcc40..33b0d415cf 100644
--- a/module/admin/control.php
+++ b/module/admin/control.php
@@ -140,7 +140,7 @@ class admin extends control
 
             if(!$result) die(js::alert($this->lang->admin->clearDataFailed));
 
-            js::alert($this->lang->admin->clearDataSuccessfully);
+            echo js::alert($this->lang->admin->clearDataSuccessfully);
             die(js::locate(inLink('index'), 'parent'));
         }
 
diff --git a/module/bug/control.php b/module/bug/control.php
index 5014729bba..7fd8cf5192 100644
--- a/module/bug/control.php
+++ b/module/bug/control.php
@@ -219,7 +219,14 @@ class bug extends control
             $response['result']  = 'success';
             $response['message'] = '';
 
-            $bugID = $this->bug->create();
+            $bugResult = $this->bug->create();
+            $bugID     = $bugResult['id'];
+            if($bugResult['status'] == 'existed')
+            {
+                $response['locate'] = $this->createLink('bug', 'view', "bugID=$bugID");
+                $this->send($response);
+            }
+
             if(dao::isError())
             {
                 $response['result']  = 'fail';
diff --git a/module/bug/model.php b/module/bug/model.php
index 5de3d31ee9..dba5241189 100644
--- a/module/bug/model.php
+++ b/module/bug/model.php
@@ -54,12 +54,17 @@ class bugModel extends model
             ->join('mailto', ',')
             ->remove('files, labels')
             ->get();
+
+        /* Check repeat bug. */
+        $bugID = $this->loadModel('common')->checkRepeat('bug', 'check', $bug->title, "product={$bug->product}");
+        if($bugID) return array('status' => 'existed', 'id' => $bugID);
+
         $this->dao->insert(TABLE_BUG)->data($bug)->autoCheck()->batchCheck($this->config->bug->create->requiredFields, 'notempty')->exec();
         if(!dao::isError())
         {
             $bugID = $this->dao->lastInsertID();
             $this->loadModel('file')->saveUpload('bug', $bugID);
-            return $bugID;
+            return array('status' => 'created', 'id' => $bugID);
         }
         return false;
     }
@@ -74,10 +79,11 @@ class bugModel extends model
     public function batchCreate($productID)
     {
         $this->loadModel('action');
-        $now     = helper::now();
-        $actions = array();
-        $data    = fixer::input('post')->get();
-        $batchNum = count(reset($data));
+        $now        = helper::now();
+        $actions    = array();
+        $data       = fixer::input('post')->get();
+        $batchNum   = count(reset($data));
+        $latestBugs = $this->loadModel('common')->checkRepeat('bug', 'get', '', "product=$productID");
 
         for($i = 0; $i < $batchNum; $i++)
         {
@@ -124,8 +130,11 @@ class bugModel extends model
                 $bug->assignedDate = $now;
             }
 
+            if($latestBugs and in_array($bug->title, $latestBugs)) continue;
+
            $this->dao->insert(TABLE_BUG)->data($bug)->autoCheck()->batchCheck($this->config->bug->create->requiredFields, 'notempty')->exec();
            $bugID = $this->dao->lastInsertID();
+           $latestBugs[$bugID] = $bug->title;
 
            if(dao::isError()) die(js::error('bug#' . ($i+1) . dao::getError(true)));
            $actions[$bugID] = $this->action->create('bug', $bugID, 'Opened');
diff --git a/module/common/model.php b/module/common/model.php
index 3f2ace4de6..ccd093e2c3 100644
--- a/module/common/model.php
+++ b/module/common/model.php
@@ -739,4 +739,47 @@ class commonModel extends model
             $this->session->set($objectType . 'OrderBy', '');
         }
     }
+
+    /**
+     * Check repeat for story,task,bug,case,doc.
+     * 
+     * @param  string $type 
+     * @param  string $mode 
+     * @param  string $title 
+     * @param  string $condition 
+     * @access public
+     * @return bool|array
+     */
+    public function checkRepeat($type, $mode = 'check', $title = '', $condition = '')
+    {
+        $table = $this->config->objectTables[$type];
+        $field = $type == 'task' ? 'name' : 'title';
+        $date  = date(DT_DATETIME1, time() - 1 * 60);
+
+        if($mode == 'check' and empty($title)) return false;
+        if($mode == 'check')
+        {
+            $repeatObject = $this->dao->select('*')->from($table)
+                ->where('deleted')->eq(0)
+                ->andWhere($field)->eq($title)
+                ->beginIF($type == 'doc')->andWhere('addedDate')->ge($date)->fi()
+                ->beginIF($type != 'doc')->andWhere('openedDate')->ge($date)->fi()
+                ->beginIF($condition)->andWhere($condition)->fi()
+                ->fetch();
+
+            if($repeatObject) return $repeatObject->id;
+            return false;
+        }
+        elseif($mode == 'get')
+        {
+            return $this->dao->select("id,$field")->from($table)
+                ->where('deleted')->eq(0)
+                ->beginIF($type == 'doc')->andWhere('addedDate')->ge($date)->fi()
+                ->beginIF($type != 'doc')->andWhere('openedDate')->ge($date)->fi()
+                ->beginIF($condition)->andWhere($condition)->fi()
+                ->fetchPairs();
+        }
+
+        return false;
+    }
 }
diff --git a/module/custom/control.php b/module/custom/control.php
index b80c365c94..044809ba13 100644
--- a/module/custom/control.php
+++ b/module/custom/control.php
@@ -39,18 +39,25 @@ class custom extends control
         $fieldList = $this->lang->$module->$field;
         if(!empty($_POST))
         {
-            $lang = $_POST['lang'];
-            $this->custom->deleteItems("lang=$lang&module=$module&section=$field");
-            foreach($_POST['keys'] as $index => $key)
+            if($module == 'story' && $field == 'review')
             {
-                $value  = $_POST['values'][$index];
-                if(!$value or !$key) continue;
-                $system = $_POST['systems'][$index];
+                $this->loadModel('setting')->setItem('system.common.storyReview.needReview', $_POST['needReview']);
+            }
+            else
+            {
+                $lang = $_POST['lang'];
+                $this->custom->deleteItems("lang=$lang&module=$module&section=$field");
+                foreach($_POST['keys'] as $index => $key)
+                {
+                    $value  = $_POST['values'][$index];
+                    if(!$value or !$key) continue;
+                    $system = $_POST['systems'][$index];
 
-                /* the length of role is 20, check it when save. */
-                if($module == 'user' and $field == 'roleList' and strlen($key) > 20) die(js::alert($this->lang->custom->notice->userRole));
+                    /* the length of role is 20, check it when save. */
+                    if($module == 'user' and $field == 'roleList' and strlen($key) > 20) die(js::alert($this->lang->custom->notice->userRole));
 
-                $this->custom->setItem("{$lang}.{$module}.{$field}.{$key}.{$system}", $value);
+                    $this->custom->setItem("{$lang}.{$module}.{$field}.{$key}.{$system}", $value);
+                }
             }
             if(dao::isError()) die(js::error(dao::getError()));
             die(js::reload('parent'));
@@ -59,6 +66,7 @@ class custom extends control
         $this->view->title       = $this->lang->custom->common . $this->lang->colon . $this->lang->$module->common;
         $this->view->position[]  = $this->lang->custom->common;
         $this->view->position[]  = $this->lang->$module->common;
+        $this->view->needReview  = isset($this->config->storyReview->needReview) ? $this->config->storyReview->needReview : 1;
         $this->view->fieldList   = $fieldList;
         $this->view->dbFields    = $this->custom->getItems("lang=$currentLang,all&module=$module&section=$field");
         $this->view->field       = $field;
diff --git a/module/custom/lang/en.php b/module/custom/lang/en.php
index 47cbec20d6..b871626fca 100644
--- a/module/custom/lang/en.php
+++ b/module/custom/lang/en.php
@@ -21,6 +21,7 @@ $lang->custom->story->fields['reasonList']       = 'Closed reason';
 $lang->custom->story->fields['reviewResultList'] = 'Reviewed result';
 $lang->custom->story->fields['stageList']        = 'Stage';
 $lang->custom->story->fields['statusList']       = 'Status';
+$lang->custom->story->fields['review']           = 'Review';
 
 $lang->custom->task = new stdClass();
 $lang->custom->task->fields['priList']    = 'Priority';
@@ -64,3 +65,7 @@ $lang->custom->confirmRestore = 'Are you sure to restore the default lang settin
 
 $lang->custom->notice = new stdclass();
 $lang->custom->notice->userRole = 'The length of key must be less than 20!';
+
+$lang->custom->storyReview   = 'Story review';
+$lang->custom->reviewList[1] = 'Open';
+$lang->custom->reviewList[0] = 'Close';
diff --git a/module/custom/lang/zh-cn.php b/module/custom/lang/zh-cn.php
index 2edeb44bac..b505c34f1f 100644
--- a/module/custom/lang/zh-cn.php
+++ b/module/custom/lang/zh-cn.php
@@ -21,6 +21,7 @@ $lang->custom->story->fields['reasonList']       = '关闭原因';
 $lang->custom->story->fields['reviewResultList'] = '评审结果';
 $lang->custom->story->fields['stageList']        = '阶段';
 $lang->custom->story->fields['statusList']       = '状态';
+$lang->custom->story->fields['review']           = '评审';
 
 $lang->custom->task = new stdClass();
 $lang->custom->task->fields['priList']    = '优先级';
@@ -64,3 +65,7 @@ $lang->custom->confirmRestore = '是否要恢复默认语言配置？';
 
 $lang->custom->notice = new stdclass();
 $lang->custom->notice->userRole = '键的长度必须小于20个字符！';
+
+$lang->custom->storyReview   = '需求评审';
+$lang->custom->reviewList[1] = '开启';
+$lang->custom->reviewList[0] = '关闭';
diff --git a/module/custom/view/set.html.php b/module/custom/view/set.html.php
index 3f28999418..b20c97d25f 100644
--- a/module/custom/view/set.html.php
+++ b/module/custom/view/set.html.php
@@ -60,6 +60,15 @@ EOT;
       <div class='panel-heading'>
         <strong><?php echo $lang->custom->object[$module] . ' >> ' . $lang->custom->$module->fields[$field]?></strong>
       </div>
+      <?php if($field == 'review'):?>
+      <table class='table table-borderless mw-600px'>
+        <tr>
+          <td><?php echo $lang->custom->storyReview;?></td>
+          <td><?php echo html::radio('needReview', $lang->custom->reviewList, $needReview);?></td>
+          <td><?php echo html::submitButton();?></td>
+        </tr>
+      </table>
+      <?php else:?>
       <table class='table table-borderless active-disabled table-condensed mw-600px'>
         <tr class='text-center'>
           <th class='w-120px'><?php echo $lang->custom->key;?></th>
@@ -92,6 +101,7 @@ EOT;
           </td>
         </tr>
       </table>
+      <?php endif;?>
     </div>
   </form>
 </div>
diff --git a/module/doc/control.php b/module/doc/control.php
index 2d3516f830..aefd03d82a 100644
--- a/module/doc/control.php
+++ b/module/doc/control.php
@@ -249,7 +249,10 @@ class doc extends control
         $projectID = (int)$projectID;
         if(!empty($_POST))
         {
-            $docID = $this->doc->create();
+            $docResult = $this->doc->create();
+            $docID     = $docResult['id'];
+
+            if($docResult['status'] == 'existed') die(js::locate($this->createLink('doc', 'view', "docID=$docID"), 'parent'));
             if(dao::isError()) die(js::error(dao::getError()));
             $this->action->create('doc', $docID, 'Created');
 
diff --git a/module/doc/model.php b/module/doc/model.php
index 232290e2e8..a9bd48f81c 100644
--- a/module/doc/model.php
+++ b/module/doc/model.php
@@ -189,6 +189,10 @@ class docModel extends model
             ->remove('files, labels')
             ->get();
         $condition = "lib = '$doc->lib' AND module = $doc->module";
+
+        $docID = $this->loadModel('common')->checkRepeat('doc', 'check', $doc->title, $condition);
+        if($docID) return array('status' => 'existed', 'id' => $docID);
+
         $this->dao->insert(TABLE_DOC)
             ->data($doc)
             ->autoCheck()
diff --git a/module/project/model.php b/module/project/model.php
index d3bb09b804..922c3186ae 100644
--- a/module/project/model.php
+++ b/module/project/model.php
@@ -929,40 +929,43 @@ class projectModel extends model
     public function importBug($projectID)
     {
         $this->loadModel('bug');
-        $bugLang = $this->app->loadLang('bug');
         $this->loadModel('task');
         $this->loadModel('story');
 
-        $now = helper::now();
-        $BugToTasks = fixer::input('post')->get();
-        foreach($BugToTasks->import as $key => $value)
+        $now     = helper::now();
+        $modules = $this->loadModel('tree')->getTaskOptionMenu($projectID);
+
+        $bugToTasks = fixer::input('post')->get();
+        $bugs       = $this->bug->getByList(array_keys($bugToTasks->import));
+        foreach($bugToTasks->import as $key => $value)
         {
-            $bug  = $this->bug->getById($key);
+            $bug  = $bugs[$key];
             $task = new stdClass();
             $task->project      = $projectID;
             $task->story        = $bug->story;
-            $task->storyVersion = $bug->story;
+            $task->storyVersion = $bug->storyVersion;
+            $task->module       = isset($modules[$bug->module]) ? $bug->module : 0;
             $task->fromBug      = $key;
             $task->name         = $bug->title;
             $task->type         = 'devel';
-            $task->pri          = $BugToTasks->pri[$key];
+            $task->pri          = $bugToTasks->pri[$key];
             $task->consumed     = 0;
             $task->status       = 'wait';
-            $task->desc         = $bugLang->bug->resolve . ':' . '#' . html::a(helper::createLink('bug', 'view', "bugID=$key"), sprintf('%03d', $key));
+            $task->desc         = $this->lang->bug->resolve . ':' . '#' . html::a(helper::createLink('bug', 'view', "bugID=$key"), sprintf('%03d', $key));
             $task->openedDate   = $now;
             $task->openedBy     = $this->app->user->account;
-            if(!empty($BugToTasks->estimate[$key]))
+            if(!empty($bugToTasks->estimate[$key]))
             {
-                $task->estimate     = $BugToTasks->estimate[$key];
+                $task->estimate     = $bugToTasks->estimate[$key];
                 $task->left         = $task->estimate;
             }
-            if(!empty($BugToTasks->assignedTo[$key]))
+            if(!empty($bugToTasks->assignedTo[$key]))
             {
-                $task->assignedTo   = $BugToTasks->assignedTo[$key];
+                $task->assignedTo   = $bugToTasks->assignedTo[$key];
                 $task->assignedDate = $now;
             }
             if(!$bug->confirmed) $this->dao->update(TABLE_BUG)->set('confirmed')->eq(1)->where('id')->eq($bug->id)->exec();
-            $this->dao->insert(TABLE_TASK)->data($task)->checkIF($BugToTasks->estimate[$key] != '', 'estimate', 'float')->exec();
+            $this->dao->insert(TABLE_TASK)->data($task)->checkIF($bugToTasks->estimate[$key] != '', 'estimate', 'float')->exec();
 
             if(dao::isError()) 
             {
diff --git a/module/story/control.php b/module/story/control.php
index 00d3e6abb3..fa64fcbdec 100644
--- a/module/story/control.php
+++ b/module/story/control.php
@@ -42,7 +42,21 @@ class story extends control
             $response['result']  = 'success';
             $response['message'] = '';
 
-            $storyID = $this->story->create($projectID, $bugID);
+            $storyResult = $this->story->create($projectID, $bugID);
+            $storyID     = $storyResult['id'];
+            if($storyResult['status'] == 'existed')
+            {
+                if($projectID == 0)
+                {
+                    $response['locate'] = $this->createLink('story', 'view', "storyID={$storyID}");
+                }
+                else
+                {
+                    $response['locate'] = $this->createLink('project', 'story', "projectID=$projectID");
+                }
+                $this->send($response);
+            }
+
             if(dao::isError())
             {
                 $response['result']  = 'fail';
@@ -164,6 +178,7 @@ class story extends control
         $this->view->verify           = $verify;
         $this->view->keywords         = $keywords;
         $this->view->mailto           = $mailto;
+        $this->view->needReview       = ($projectID > 0 || (isset($this->config->storyReview->needReview) && $this->config->storyReview->needReview == 0 )) ? "checked='checked'" : "";
 
         $this->display();
     }
@@ -422,6 +437,7 @@ class story extends control
         $this->view->title      = $this->lang->story->change . "STORY" . $this->lang->colon . $this->view->story->title;
         $this->view->users      = $this->user->getPairs('nodeleted|pofirst', $this->view->story->assignedTo);
         $this->view->position[] = $this->lang->story->change;
+        $this->view->needReview = (isset($this->config->storyReview->needReview) && $this->config->storyReview->needReview == 0) ? "checked='checked'" : "";
         $this->display();
     }
 
diff --git a/module/story/model.php b/module/story/model.php
index 01d0e00024..561bfa5aae 100644
--- a/module/story/model.php
+++ b/module/story/model.php
@@ -137,6 +137,10 @@ class storyModel extends model
             ->remove('files,labels,spec,verify,needNotReview,newStory')
             ->get();
 
+        /* Check repeat story. */
+        $storyID = $this->loadModel('common')->checkRepeat('story', 'check', $story->title, "product={$story->product}");
+        if($storyID) return array('status' => 'existed', 'id' => $storyID);
+
         $this->dao->insert(TABLE_STORY)->data($story)->autoCheck()->batchCheck($this->config->story->create->requiredFields, 'notempty')->exec();
         if(!dao::isError())
         {
@@ -193,7 +197,7 @@ class storyModel extends model
                     }
                 }
             }
-            return $storyID;
+            return array('status' => 'created', 'id' => $storyID);
         }
         return false;
     }
@@ -206,9 +210,10 @@ class storyModel extends model
      */
     public function batchCreate($productID = 0)
     {
-        $now      = helper::now();
-        $stories  = fixer::input('post')->get();
-        $batchNum = count(current($stories));
+        $now           = helper::now();
+        $stories       = fixer::input('post')->get();
+        $batchNum      = count(reset($stories));
+        $latestStories = $this->loadModel('common')->checkRepeat('story', 'get', '', "product={$productID}");
 
         for($i = 0; $i < $batchNum; $i++)
         {
@@ -226,6 +231,8 @@ class storyModel extends model
                 $data[$i]->openedDate = $now;
                 $data[$i]->version    = 1;
 
+                if($latestStories and in_array($data[$i]->title, $latestStories)) continue;
+
                 $this->dao->insert(TABLE_STORY)
                     ->data($data[$i])
                     ->autoCheck()
@@ -238,6 +245,7 @@ class storyModel extends model
                 }
 
                 $storyID = $this->dao->lastInsertID();
+                $latestStories[$storyID] = $data[$i]->title;
                 $this->setStage($storyID);
 
                 $specData[$i] = new stdclass();
diff --git a/module/story/view/change.html.php b/module/story/view/change.html.php
index c42d129dc8..576749a46a 100644
--- a/module/story/view/change.html.php
+++ b/module/story/view/change.html.php
@@ -27,7 +27,7 @@
           <div class="input-group w-p35-f">
             <?php echo html::select('assignedTo', $users, $story->assignedTo, 'class="form-control chosen"');?>
             <span class="input-group-addon">
-            <?php echo html::checkbox('needNotReview', $lang->story->needNotReview, '', "id='needNotReview'");?>
+            <?php echo html::checkbox('needNotReview', $lang->story->needNotReview, '', "id='needNotReview' {$needReview}");?>
             </span>
           </div>
         </td>
diff --git a/module/story/view/create.html.php b/module/story/view/create.html.php
index 6ed9a92181..2ea9485a67 100644
--- a/module/story/view/create.html.php
+++ b/module/story/view/create.html.php
@@ -93,7 +93,7 @@
       <tr>
         <th><?php echo $lang->story->reviewedBy;?></th>
         <td><?php echo html::select('assignedTo', $users, '', "class='form-control chosen'");?></td>
-        <td><?php echo html::checkbox('needNotReview', $lang->story->needNotReview, '', "id='needNotReview'" . ($projectID > 0 ? " checked='checked'" : ""));?></td>
+        <td><?php echo html::checkbox('needNotReview', $lang->story->needNotReview, '', "id='needNotReview' {$needReview}");?></td>
       </tr>  
        <tr>
         <th><nobr><?php echo $lang->story->mailto;?></nobr></th>
diff --git a/module/task/control.php b/module/task/control.php
index c7005acdc3..e12df4f95c 100644
--- a/module/task/control.php
+++ b/module/task/control.php
@@ -80,6 +80,10 @@ class task extends control
             $this->loadModel('action');
             foreach($tasksID as $taskID)
             {
+                /* if status is existed then this task has existed not new create. */
+                if($taskID['status'] == 'existed') continue;
+
+                $taskID   = $taskID['id'];
                 $actionID = $this->action->create('task', $taskID, 'Opened', '');
                 $this->sendmail($taskID, $actionID);
             }            
diff --git a/module/task/js/batchcreate.js b/module/task/js/batchcreate.js
index 33b7b30fab..6c2e32aef2 100755
--- a/module/task/js/batchcreate.js
+++ b/module/task/js/batchcreate.js
@@ -37,6 +37,7 @@ function setStoryRelated(num)
         $.get(link, function(moduleID)
         {
             $('#module' + num).val(moduleID);
+            $('#module' + num).trigger("chosen:updated");
         });
     }
 }
diff --git a/module/task/model.php b/module/task/model.php
index b814b91e72..877f870ec5 100644
--- a/module/task/model.php
+++ b/module/task/model.php
@@ -22,8 +22,9 @@ class taskModel extends model
      */
     public function create($projectID)
     {
-        $tasksID = array();
-        $taskFile = '';
+        $tasksID     = array();
+        $taskFile    = '';
+        $latestTasks = $this->loadModel('common')->checkRepeat('task', 'get', '', "project=$projectID");
         foreach($this->post->assignedTo as $assignedTo)
         {
             if($this->post->type == 'affair' and empty($assignedTo)) continue;
@@ -45,6 +46,13 @@ class taskModel extends model
 
             if($assignedTo) $task->assignedDate = helper::now();
 
+            /* Check repeat story. */
+            if($latestTasks and $taskID = array_search($task->name, $latestTasks))
+            {
+                $tasksID[$assignedTo] = array('status' => 'existed', 'id' => $taskID);
+                continue;
+            }
+
             $this->dao->insert(TABLE_TASK)->data($task)
                 ->autoCheck()
                 ->batchCheck($this->config->task->create->requiredFields, 'notempty')
@@ -67,7 +75,7 @@ class taskModel extends model
                     $taskFile = $this->dao->select('*')->from(TABLE_FILE)->where('id')->eq(key($taskFileTitle))->fetch();
                     unset($taskFile->id);
                 }
-                $tasksID[$assignedTo] = $taskID;
+                $tasksID[$assignedTo] = array('status' => 'created', 'id' => $taskID);
             }
             else
             {
@@ -87,10 +95,11 @@ class taskModel extends model
     public function batchCreate($projectID)
     {
         $this->loadModel('action');
-        $now      = helper::now();
-        $mails    = array();
-        $tasks    = fixer::input('post')->get();
-        $batchNum = count(current($tasks));
+        $now         = helper::now();
+        $mails       = array();
+        $tasks       = fixer::input('post')->get();
+        $batchNum    = count(reset($tasks));
+        $latestTasks = $this->loadModel('common')->checkRepeat('task', 'get', '', "project=$projectID");
 
         /* check estimate. */
         for($i = 0; $i < $batchNum; $i++)
@@ -123,6 +132,8 @@ class taskModel extends model
             if($tasks->story[$i] != '') $data[$i]->storyVersion = $this->loadModel('story')->getVersion($data[$i]->story);
             if($tasks->assignedTo[$i] != '') $data[$i]->assignedDate = $now;
 
+            if($latestTasks and in_array($data[$i]->name, $latestTasks)) continue;
+
             $this->dao->insert(TABLE_TASK)->data($data[$i])
                 ->autoCheck()
                 ->batchCheck($this->config->task->create->requiredFields, 'notempty')
@@ -132,6 +143,7 @@ class taskModel extends model
             if(dao::isError()) die(js::error(dao::getError()));
 
             $taskID = $this->dao->lastInsertID();
+            $latestTasks[$taskID] = $data[$i]->name;
             if($tasks->story[$i] != false) $this->story->setStage($tasks->story[$i]);
             $actionID = $this->action->create('task', $taskID, 'Opened', '');
             
diff --git a/module/testcase/control.php b/module/testcase/control.php
index 4a2a4cdb07..2c171aa5ec 100644
--- a/module/testcase/control.php
+++ b/module/testcase/control.php
@@ -226,7 +226,14 @@ class testcase extends control
             $response['result']  = 'success';
             $response['message'] = '';
 
-            $caseID = $this->testcase->create($bugID);
+            $caseResult = $this->testcase->create($bugID);
+            $caseID     = $caseResult['id'];
+            if($caseResult['status'] == 'existed')
+            {
+                $response['locate'] = $this->createLink('testcase', 'view', "caseID=$caseID");
+                $this->send($response);
+            }
+
             if(dao::isError())
             {
                 $response['result']  = 'fail';
diff --git a/module/testcase/model.php b/module/testcase/model.php
index c20ca8f452..8abaacac19 100644
--- a/module/testcase/model.php
+++ b/module/testcase/model.php
@@ -53,6 +53,10 @@ class testcaseModel extends model
             ->setDefault('story', 0)
             ->join('stage', ',')
             ->get();
+
+        $caseID = $this->loadModel('common')->checkRepeat('case', 'check', $case->title, "product={$case->product}");
+        if($caseID) return array('status' => 'existed', 'id' => $caseID);
+
         $this->dao->insert(TABLE_CASE)->data($case)->autoCheck()->batchCheck($this->config->testcase->create->requiredFields, 'notempty')->exec();
         if(!$this->dao->isError())
         {
@@ -68,7 +72,7 @@ class testcaseModel extends model
                 $step->expect  = htmlspecialchars($this->post->expects[$stepID]);
                 $this->dao->insert(TABLE_CASESTEP)->data($step)->autoCheck()->exec();
             }
-            return $caseID;
+            return array('status' => 'created', 'id' => $caseID);
         }
     }
     
@@ -82,9 +86,10 @@ class testcaseModel extends model
      */
     function batchCreate($productID, $storyID)
     {
-        $now      = helper::now();
-        $cases    = fixer::input('post')->get();
-        $batchNum = count(current($cases));
+        $now         = helper::now();
+        $cases       = fixer::input('post')->get();
+        $batchNum    = count(reset($cases));
+        $latestCases = $this->loadModel('common')->checkRepeat('case', 'get', '', "product=$productID");
 
         for($i = 0; $i < $batchNum; $i++)
         {
@@ -113,6 +118,8 @@ class testcaseModel extends model
                     $data[$i]->storyVersion = $this->loadModel('story')->getVersion($this->post->story);
                 }
 
+                if($latestCases and in_array($data[$i]->title, $latestCases)) continue;
+
                 $this->dao->insert(TABLE_CASE)->data($data[$i])
                     ->autoCheck()
                     ->batchCheck($this->config->testcase->create->requiredFields, 'notempty')
@@ -125,6 +132,7 @@ class testcaseModel extends model
                 }
 
                 $caseID = $this->dao->lastInsertID();
+                $latestCases[$caseID] = $data[$i]->title;
                 $actionID = $this->loadModel('action')->create('case', $caseID, 'Opened');
             }
             else
diff --git a/module/tree/model.php b/module/tree/model.php
index d04140e670..e994727b61 100644
--- a/module/tree/model.php
+++ b/module/tree/model.php
@@ -439,8 +439,7 @@ class treeModel extends model
         if($linkStory)
         {
             /* Get story paths of this project. */
-            $paths = $this->dao->select('t3.' . $field)
-                ->from(TABLE_PROJECTSTORY)->alias('t1')
+            $paths = $this->dao->select('DISTINCT t3.' . $field)->from(TABLE_PROJECTSTORY)->alias('t1')
                 ->leftJoin(TABLE_STORY)->alias('t2')->on('t1.story = t2.id')
                 ->leftJoin(TABLE_MODULE)->alias('t3')->on('t2.module = t3.id')
                 ->where('t1.project')->eq($projectID)
@@ -461,6 +460,14 @@ class treeModel extends model
             ->andWhere('type')->eq('task')
             ->fetchPairs();
 
+        /* Add task paths of this project for has existed. */
+        $paths += $this->dao->select('DISTINCT t1.' . $field)->from(TABLE_MODULE)->alias('t1')
+            ->leftJoin(TABLE_TASK)->alias('t2')->on('t1.id=t2.module')
+            ->where('t2.module')->ne(0)
+            ->andWhere('t2.deleted')->eq(0)
+            ->andWhere('t1.type')->eq('story')
+            ->fetchPairs();
+
         /* Get all modules from paths. */
         foreach($paths as $path)
         {