diff --git a/vendor/autoload.php b/vendor/autoload.php
index fc8e44c10..497b0c5f2 100644
--- a/vendor/autoload.php
+++ b/vendor/autoload.php
@@ -4,4 +4,4 @@
 
 require_once __DIR__ . '/composer/autoload_real.php';
 
-return ComposerAutoloaderInitf3ef7a459e4b29cdf35865d01f6cf929::getLoader();
+return ComposerAutoloaderInit100512daef0328603db43c7860e1b81c::getLoader();
diff --git a/vendor/composer/autoload_real.php b/vendor/composer/autoload_real.php
index c421d1d38..ad4bd6ede 100644
--- a/vendor/composer/autoload_real.php
+++ b/vendor/composer/autoload_real.php
@@ -2,7 +2,7 @@
 
 // autoload_real.php @generated by Composer
 
-class ComposerAutoloaderInitf3ef7a459e4b29cdf35865d01f6cf929
+class ComposerAutoloaderInit100512daef0328603db43c7860e1b81c
 {
     private static $loader;
 
@@ -19,15 +19,15 @@ class ComposerAutoloaderInitf3ef7a459e4b29cdf35865d01f6cf929
             return self::$loader;
         }
 
-        spl_autoload_register(array('ComposerAutoloaderInitf3ef7a459e4b29cdf35865d01f6cf929', 'loadClassLoader'), true, true);
+        spl_autoload_register(array('ComposerAutoloaderInit100512daef0328603db43c7860e1b81c', 'loadClassLoader'), true, true);
         self::$loader = $loader = new \Composer\Autoload\ClassLoader();
-        spl_autoload_unregister(array('ComposerAutoloaderInitf3ef7a459e4b29cdf35865d01f6cf929', 'loadClassLoader'));
+        spl_autoload_unregister(array('ComposerAutoloaderInit100512daef0328603db43c7860e1b81c', 'loadClassLoader'));
 
         $useStaticLoader = PHP_VERSION_ID >= 50600 && !defined('HHVM_VERSION');
         if ($useStaticLoader) {
             require_once __DIR__ . '/autoload_static.php';
 
-            call_user_func(\Composer\Autoload\ComposerStaticInitf3ef7a459e4b29cdf35865d01f6cf929::getInitializer($loader));
+            call_user_func(\Composer\Autoload\ComposerStaticInit100512daef0328603db43c7860e1b81c::getInitializer($loader));
         } else {
             $map = require __DIR__ . '/autoload_namespaces.php';
             foreach ($map as $namespace => $path) {
@@ -48,19 +48,19 @@ class ComposerAutoloaderInitf3ef7a459e4b29cdf35865d01f6cf929
         $loader->register(true);
 
         if ($useStaticLoader) {
-            $includeFiles = Composer\Autoload\ComposerStaticInitf3ef7a459e4b29cdf35865d01f6cf929::$files;
+            $includeFiles = Composer\Autoload\ComposerStaticInit100512daef0328603db43c7860e1b81c::$files;
         } else {
             $includeFiles = require __DIR__ . '/autoload_files.php';
         }
         foreach ($includeFiles as $fileIdentifier => $file) {
-            composerRequiref3ef7a459e4b29cdf35865d01f6cf929($fileIdentifier, $file);
+            composerRequire100512daef0328603db43c7860e1b81c($fileIdentifier, $file);
         }
 
         return $loader;
     }
 }
 
-function composerRequiref3ef7a459e4b29cdf35865d01f6cf929($fileIdentifier, $file)
+function composerRequire100512daef0328603db43c7860e1b81c($fileIdentifier, $file)
 {
     if (empty($GLOBALS['__composer_autoload_files'][$fileIdentifier])) {
         require $file;
diff --git a/vendor/composer/autoload_static.php b/vendor/composer/autoload_static.php
index 9fa69c889..ac4bceeab 100644
--- a/vendor/composer/autoload_static.php
+++ b/vendor/composer/autoload_static.php
@@ -4,7 +4,7 @@
 
 namespace Composer\Autoload;
 
-class ComposerStaticInitf3ef7a459e4b29cdf35865d01f6cf929
+class ComposerStaticInit100512daef0328603db43c7860e1b81c
 {
     public static $files = array (
         '9b552a3cc426e3287cc811caefa3cf53' => __DIR__ . '/..' . '/topthink/think-helper/src/helper.php',
@@ -314,9 +314,9 @@ class ComposerStaticInitf3ef7a459e4b29cdf35865d01f6cf929
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitf3ef7a459e4b29cdf35865d01f6cf929::$prefixLengthsPsr4;
-            $loader->prefixDirsPsr4 = ComposerStaticInitf3ef7a459e4b29cdf35865d01f6cf929::$prefixDirsPsr4;
-            $loader->classMap = ComposerStaticInitf3ef7a459e4b29cdf35865d01f6cf929::$classMap;
+            $loader->prefixLengthsPsr4 = ComposerStaticInit100512daef0328603db43c7860e1b81c::$prefixLengthsPsr4;
+            $loader->prefixDirsPsr4 = ComposerStaticInit100512daef0328603db43c7860e1b81c::$prefixDirsPsr4;
+            $loader->classMap = ComposerStaticInit100512daef0328603db43c7860e1b81c::$classMap;
 
         }, null, ClassLoader::class);
     }
diff --git a/vendor/composer/installed.json b/vendor/composer/installed.json
index 5c982a2a2..097767a27 100644
--- a/vendor/composer/installed.json
+++ b/vendor/composer/installed.json
@@ -260,20 +260,20 @@
     },
     {
         "name": "topthink/think-mongo",
-        "version": "v1.6",
-        "version_normalized": "1.6.0.0",
+        "version": "v1.7",
+        "version_normalized": "1.7.0.0",
         "source": {
             "type": "git",
             "url": "https://github.com/top-think/think-mongo.git",
-            "reference": "1c6d29f58bd7caa8da088c167b4e65ddac621588"
+            "reference": "fc552c8fe5798679a52f4f0d7e60763f64aeb155"
         },
         "dist": {
             "type": "zip",
-            "url": "https://files.phpcomposer.com/files/top-think/think-mongo/1c6d29f58bd7caa8da088c167b4e65ddac621588.zip",
-            "reference": "1c6d29f58bd7caa8da088c167b4e65ddac621588",
+            "url": "https://files.phpcomposer.com/files/top-think/think-mongo/fc552c8fe5798679a52f4f0d7e60763f64aeb155.zip",
+            "reference": "fc552c8fe5798679a52f4f0d7e60763f64aeb155",
             "shasum": ""
         },
-        "time": "2017-02-13 07:17:51",
+        "time": "2017-05-05 07:52:33",
         "type": "library",
         "installation-source": "dist",
         "autoload": {
diff --git a/vendor/topthink/think-mongo/src/Connection.php b/vendor/topthink/think-mongo/src/Connection.php
index 752ffd048..e2ba9c35b 100644
--- a/vendor/topthink/think-mongo/src/Connection.php
+++ b/vendor/topthink/think-mongo/src/Connection.php
@@ -66,6 +66,8 @@ class Connection
         'hostname'        => '',
         // 数据库名
         'database'        => '',
+        // 是否是复制集
+        'is_replica_set'  => false,
         // 用户名
         'username'        => '',
         // 密码
@@ -162,6 +164,18 @@ class Connection
         return $this->links[$linkNum];
     }
 
+    /**
+     * 指定当前使用的查询对象
+     * @access public
+     * @param Query $query 查询对象
+     * @return $this
+     */
+    public function setQuery($query, $model = 'db')
+    {
+        $this->query[$model] = $query;
+        return $this;
+    }
+
     /**
      * 创建指定模型的查询对象
      * @access public
@@ -567,7 +581,11 @@ class Connection
             // 主从式采用读写分离
             if ($master) // 主服务器写入
             {
-                $r = $m;
+                if ($this->config['is_replica_set']) {
+                    return $this->replicaSetConnect();
+                } else {
+                    $r = $m;
+                }
             } elseif (is_numeric($this->config['slave_no'])) {
                 // 指定服务器读
                 $r = $this->config['slave_no'];
@@ -586,6 +604,41 @@ class Connection
         return $this->connect($dbConfig, $r);
     }
 
+    /**
+     * 创建基于复制集的连接
+     * @return Manager
+     */
+    public function replicaSetConnect()
+    {
+        $this->dbName  = $this->config['database'];
+        $this->typeMap = $this->config['type_map'];
+        if ($this->config['debug']) {
+            $startTime = microtime(true);
+        }
+        $this->config['params']['replicaSet'] = $this->config['database'];
+        $manager                              = new Manager($this->buildUrl(), $this->config['params']);
+        if ($this->config['debug']) {
+            // 记录数据库连接信息
+            Log::record('[ DB ] CONNECT:[ UseTime:' . number_format(microtime(true) - $startTime, 6) . 's ] ' . $this->config['dsn'], 'sql');
+        }
+        return $manager;
+    }
+
+    /**
+     * 根据配置信息 生成适用于链接复制集的 URL
+     * @return string
+     */
+    private function buildUrl()
+    {
+        $url      = 'mongodb://' . ($this->config['username'] ? "{$this->config['username']}" : '') . ($this->config['password'] ? ":{$this->config['password']}@" : '');
+        $hostList = explode(',', $this->config['hostname']);
+        $portList = explode(',', $this->config['hostport']);
+        for ($i = 0; $i < count($hostList); $i++) {
+            $url = $url . $hostList[$i] . ':' . $portList[0] . ',';
+        }
+        return rtrim($url, ",") . '/';
+    }
+
     /**
      * 析构方法
      * @access public
diff --git a/vendor/topthink/think-mongo/src/Query.php b/vendor/topthink/think-mongo/src/Query.php
index 022486a3a..efb30af37 100644
--- a/vendor/topthink/think-mongo/src/Query.php
+++ b/vendor/topthink/think-mongo/src/Query.php
@@ -1044,6 +1044,17 @@ class Query
         return $this;
     }
 
+    /**
+     * 设置软删除字段及条件（暂无支持）
+     * @access public
+     * @param false|string  $field     查询字段
+     * @param mixed         $condition 查询条件
+     * @return $this
+     */
+    public function useSoftDelete($field, $condition = null)
+    {
+    }
+
     /**
      * 不主动获取数据集
      * @access public
@@ -1800,7 +1811,7 @@ class Query
      * 查找单条记录
      * @access public
      * @param array|string|Query|\Closure $data
-     * @return array|false|Cursor|string|Model
+     * @return array|null|Cursor|string|Model
      * @throws ModelNotFoundException
      * @throws DataNotFoundException
      * @throws AuthenticationException
@@ -2005,6 +2016,8 @@ class Query
             $result = $this->table($tableName)->find();
             if ($result instanceof Model) {
                 $result = $result->toArray();
+            } elseif (!$result) {
+                $result = [];
             }
             $fields = array_keys($result);
             $type   = [];