diff --git a/library/think/db/driver/mongo.php b/library/think/db/driver/mongo.php
index 8eda7ea1..384ec1e8 100644
--- a/library/think/db/driver/mongo.php
+++ b/library/think/db/driver/mongo.php
@@ -65,7 +65,7 @@ class Mongo extends Driver
     {
         if (!isset($this->linkID[$linkNum])) {
             if (empty($config)) {
-                $config = $this->config['connection'];
+                $config = $this->config;
             }
 
             $host = 'mongodb://' . ($config['username'] ? "{$config['username']}" : '') . ($config['password'] ? ":{$config['password']}@" : '') . $config['hostname'] . ($config['hostport'] ? ":{$config['hostport']}" : '') . '/' . ($config['database'] ? "{$config['database']}" : '');
@@ -95,6 +95,8 @@ class Mongo extends Driver
             $this->initConnect($master);
         }
 
+        $db = $db?$db:$this->config['database'];
+
         try {
             if (!empty($db)) {
                 // 传人Db则切换数据库
diff --git a/library/think/model/mongo.php b/library/think/model/mongo.php
index d62c7f3c..ab599481 100644
--- a/library/think/model/mongo.php
+++ b/library/think/model/mongo.php
@@ -13,12 +13,16 @@ namespace think\model;
 use think\Lang;
 use think\Loader;
 
+T('modle/adv');
+
 /**
  * MongoModel模型类
  * 实现了ODM和ActiveRecords模式
  */
 class Mongo extends \Think\Model
 {
+    use \traits\model\adv;
+
     // 主键类型
     const TYPE_OBJECT = 1;
     const TYPE_INT    = 2;
@@ -164,7 +168,7 @@ class Mongo extends \Think\Model
             return false;
         }
         if (empty($result)) {
-// 查询结果为空
+            // 查询结果为空
             return null;
         } else {
             $this->checkMongoId($result);
@@ -237,9 +241,10 @@ class Mongo extends \Think\Model
         } else {
             // 返回数据个数
             if (true !== $sepa) {
-// 当sepa指定为true的时候 返回所有数据
+                // 当sepa指定为true的时候 返回所有数据
                 $options['limit'] = is_numeric($sepa) ? $sepa : 1;
-            } // 查找一条记录
+            } 
+            // 查找一条记录
             $result = $this->db->find($options);
             if (!empty($result)) {
                 if (1 == $options['limit']) {