diff --git a/library/think/Model.php b/library/think/Model.php
index 8553fec6..e92a9344 100644
--- a/library/think/Model.php
+++ b/library/think/Model.php
@@ -995,7 +995,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
             }
 
             // 模型更新
-            $result = $this->db()->where($where)->update($data);
+            $result = $this->getQuery()->where($where)->update($data);
 
             // 关联更新
             if (isset($relation)) {
@@ -1022,11 +1022,11 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
                 return false;
             }
 
-            $result = $this->db()->insert($this->data);
+            $result = $this->getQuery()->insert($this->data);
 
             // 获取自动增长主键
             if ($result && is_string($pk) && (!isset($this->data[$pk]) || '' == $this->data[$pk])) {
-                $insertId = $this->db()->getLastInsID($sequence);
+                $insertId = $this->getQuery()->getLastInsID($sequence);
                 if ($insertId) {
                     $this->data[$pk] = $insertId;
                 }
@@ -1114,7 +1114,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
         }
 
         $result = [];
-        $db     = $this->db();
+        $db     = $this->getQuery();
         $db->startTrans();
         try {
             $pk = $this->getPk();
@@ -1228,7 +1228,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
         }
 
         // 删除当前模型数据
-        $result = $this->db()->where($where)->delete();
+        $result = $this->getQuery()->where($where)->delete();
 
         // 关联删除
         if (!empty($this->relationWrite)) {
diff --git a/library/think/Paginator.php b/library/think/Paginator.php
index d3547f8b..92d70f04 100644
--- a/library/think/Paginator.php
+++ b/library/think/Paginator.php
@@ -273,6 +273,23 @@ abstract class Paginator implements ArrayAccess, Countable, IteratorAggregate, J
         return $this->items->isEmpty();
     }
 
+    /**
+     * 给每个元素执行个回调
+     *
+     * @param  callable $callback
+     * @return $this
+     */
+    public function each(callable $callback)
+    {
+        foreach ($this->items as $key => $item) {
+            if ($callback($item, $key) === false) {
+                break;
+            }
+        }
+
+        return $this;
+    }
+
     /**
      * Retrieve an external iterator
      * @return Traversable An instance of an object implementing <b>Iterator</b> or
diff --git a/library/think/Request.php b/library/think/Request.php
index 1eb7f297..583dfb84 100644
--- a/library/think/Request.php
+++ b/library/think/Request.php
@@ -1034,7 +1034,7 @@ class Request
             $filter = [];
         } else {
             $filter = $filter ?: $this->filter;
-            if (is_string($filter)) {
+            if (is_string($filter) && false === strpos($filter, '/')) {
                 $filter = explode(',', $filter);
             } else {
                 $filter = (array) $filter;
@@ -1060,7 +1060,7 @@ class Request
                 // 调用函数或者方法过滤
                 $value = call_user_func($filter, $value);
             } elseif (is_scalar($value)) {
-                if (strpos($filter, '/')) {
+                if (false !== strpos($filter, '/')) {
                     // 正则过滤
                     if (!preg_match($filter, $value)) {
                         // 匹配不成功返回默认值
diff --git a/library/think/Route.php b/library/think/Route.php
index a3001d8f..a5b19327 100644
--- a/library/think/Route.php
+++ b/library/think/Route.php
@@ -924,7 +924,7 @@ class Route
                 } else {
                     $str = $key;
                 }
-                if (is_string($str) && $str && 0 !== strpos(str_replace('|', '/', $url), $str)) {
+                if (is_string($str) && $str && 0 !== stripos(str_replace('|', '/', $url), $str)) {
                     continue;
                 }
                 self::setOption($option);
diff --git a/library/think/db/Connection.php b/library/think/db/Connection.php
index d2aa6ea9..908384cb 100644
--- a/library/think/db/Connection.php
+++ b/library/think/db/Connection.php
@@ -780,11 +780,31 @@ abstract class Connection
     /**
      * 是否断线
      * @access protected
-     * @param \PDOException  $e 异常
+     * @param \PDOException  $e 异常对象
      * @return bool
      */
     protected function isBreak($e)
     {
+        $info = [
+            'server has gone away',
+            'no connection to the server',
+            'Lost connection',
+            'is dead or not enabled',
+            'Error while sending',
+            'decryption failed or bad record mac',
+            'server closed the connection unexpectedly',
+            'SSL connection has been closed unexpectedly',
+            'Error writing data to the connection',
+            'Resource deadlock avoided',
+        ];
+
+        $error = $e->getMessage();
+
+        foreach ($info as $msg) {
+            if (false !== stripos($error, $msg)) {
+                return true;
+            }
+        }
         return false;
     }
 
diff --git a/library/think/db/Query.php b/library/think/db/Query.php
index 55b70941..88fc23a1 100644
--- a/library/think/db/Query.php
+++ b/library/think/db/Query.php
@@ -401,7 +401,7 @@ class Query
             if (empty($this->options['table'])) {
                 $this->options['table'] = $this->getTable();
             }
-            $key    = is_string($cache['key']) ? $cache['key'] : md5($field . serialize($this->options));
+            $key    = is_string($cache['key']) ? $cache['key'] : md5($field . serialize($this->options) . serialize($this->bind));
             $result = Cache::get($key);
         }
         if (false === $result) {
@@ -444,7 +444,7 @@ class Query
             if (empty($this->options['table'])) {
                 $this->options['table'] = $this->getTable();
             }
-            $guid   = is_string($cache['key']) ? $cache['key'] : md5($field . serialize($this->options));
+            $guid   = is_string($cache['key']) ? $cache['key'] : md5($field . serialize($this->options) . serialize($this->bind));
             $result = Cache::get($guid);
         }
         if (false === $result) {
@@ -596,7 +596,7 @@ class Query
         }
         if ($lazyTime > 0) {
             // 延迟写入
-            $guid = md5($this->getTable() . '_' . $field . '_' . serialize($condition));
+            $guid = md5($this->getTable() . '_' . $field . '_' . serialize($condition) . serialize($this->bind));
             $step = $this->lazyWrite('inc', $guid, $step, $lazyTime);
             if (false === $step) {
                 // 清空查询条件
@@ -625,7 +625,7 @@ class Query
         }
         if ($lazyTime > 0) {
             // 延迟写入
-            $guid = md5($this->getTable() . '_' . $field . '_' . serialize($condition));
+            $guid = md5($this->getTable() . '_' . $field . '_' . serialize($condition) . serialize($this->bind));
             $step = $this->lazyWrite('dec', $guid, $step, $lazyTime);
             if (false === $step) {
                 // 清空查询条件
@@ -1902,6 +1902,9 @@ class Query
                 $closure    = $relation;
                 $relation   = $key;
                 $with[$key] = $key;
+            } elseif (is_array($relation)) {
+                $subRelation = $relation;
+                $relation    = $key;
             } elseif (is_string($relation) && strpos($relation, '.')) {
                 $with[$key]                   = $relation;
                 list($relation, $subRelation) = explode('.', $relation, 2);
@@ -2205,7 +2208,7 @@ class Query
                 $options['where']['AND'] = $where;
             }
         } elseif (!isset($key) && is_string($pk) && isset($options['where']['AND'][$pk])) {
-            $key = $this->getCacheKey($options['where']['AND'][$pk], $options);
+            $key = $this->getCacheKey($options['where']['AND'][$pk], $options, $this->bind);
         }
 
         // 生成UPDATE SQL语句
@@ -2293,7 +2296,7 @@ class Query
             // 判断查询缓存
             $cache = $options['cache'];
             unset($options['cache']);
-            $key       = is_string($cache['key']) ? $cache['key'] : md5(serialize($options));
+            $key       = is_string($cache['key']) ? $cache['key'] : md5(serialize($options) . serialize($this->bind));
             $resultSet = Cache::get($key);
         }
         if (!$resultSet) {
@@ -2385,8 +2388,9 @@ class Query
      * @access public
      * @param mixed     $value   缓存数据
      * @param array     $options 缓存参数
+     * @param array     $bind    绑定参数
      */
-    protected function getCacheKey($value, $options)
+    protected function getCacheKey($value, $options, $bind = [])
     {
         if (is_scalar($value)) {
             $data = $value;
@@ -2394,9 +2398,9 @@ class Query
             $data = $value[1];
         }
         if (isset($data)) {
-            return 'think:' . $options['table'] . '|' . $data;
+            return 'think:' . (is_array($options['table']) ? key($options['table']) : $options['table']) . '|' . $data;
         } else {
-            return md5(serialize($options));
+            return md5(serialize($options) . serialize($bind));
         }
     }
 
@@ -2424,7 +2428,7 @@ class Query
             // AR模式分析主键条件
             $this->parsePkWhere($data, $options);
         } elseif (!empty($options['cache']) && true === $options['cache']['key'] && is_string($pk) && isset($options['where']['AND'][$pk])) {
-            $key = $this->getCacheKey($options['where']['AND'][$pk], $options);
+            $key = $this->getCacheKey($options['where']['AND'][$pk], $options, $this->bind);
         }
 
         $options['limit'] = 1;
@@ -2437,7 +2441,7 @@ class Query
             } elseif (is_string($cache['key'])) {
                 $key = $cache['key'];
             } elseif (!isset($key)) {
-                $key = md5(serialize($options));
+                $key = md5(serialize($options) . serialize($this->bind));
             }
             $result = Cache::get($key);
         }
@@ -2648,7 +2652,7 @@ class Query
             // AR模式分析主键条件
             $this->parsePkWhere($data, $options);
         } elseif (!isset($key) && is_string($pk) && isset($options['where']['AND'][$pk])) {
-            $key = $this->getCacheKey($options['where']['AND'][$pk], $options);
+            $key = $this->getCacheKey($options['where']['AND'][$pk], $options, $this->bind);
         }
 
         if (true !== $data && empty($options['where'])) {
diff --git a/library/think/db/connector/Mysql.php b/library/think/db/connector/Mysql.php
index 0081fb2e..dc717532 100644
--- a/library/think/db/connector/Mysql.php
+++ b/library/think/db/connector/Mysql.php
@@ -130,17 +130,4 @@ class Mysql extends Connection
         return true;
     }
 
-    /**
-     * 是否断线
-     * @access protected
-     * @param \PDOException  $e 异常对象
-     * @return bool
-     */
-    protected function isBreak($e)
-    {
-        if (false !== stripos($e->getMessage(), 'server has gone away')) {
-            return true;
-        }
-        return false;
-    }
 }
diff --git a/tpl/think_exception.tpl b/tpl/think_exception.tpl
index 2d898c30..0c9d31ed 100644
--- a/tpl/think_exception.tpl
+++ b/tpl/think_exception.tpl
@@ -79,7 +79,7 @@
 <html>
 <head>
     <meta charset="UTF-8">
-    <title><?php echo lang('System Error'); ?></title>
+    <title><?php echo \think\Lang::get('System Error'); ?></title>
     <meta name="robots" content="noindex,nofollow" />
     <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
     <style>