修正Connection类

library/think/Model.php

@@ -175,7 +175,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
         // 设置当前模型 确保查询返回模型对象
         $queryClass = $this->query ?: $con->getConfig('query');
         $query      = new $queryClass($con, $this->class);
-        $con->setQuery($query);
+        $con->setQuery($query, $this->class);
 
         // 设置当前数据表和模型名
         if (!empty($this->table)) {

library/think/db/Connection.php

@@ -57,7 +57,7 @@ abstract class Connection
     // 监听回调
     protected static $event = [];
     // 查询对象
-    protected $query;
+    protected $query = [];
     // 使用Builder类
     protected $builder;
     // 数据库连接参数配置
@@ -142,9 +142,9 @@ abstract class Connection
      * @param Query $query 查询对象
      * @return $this
      */
-    public function setQuery($query)
+    public function setQuery($query, $model = 'db')
     {
-        $this->query = $query;
+        $this->query[$model] = $query;
 
         return $this;
     }
@@ -154,15 +154,15 @@ abstract class Connection
      * @access public
      * @return Query
      */
-    public function getQuery()
+    public function getQuery($model = 'db')
     {
-        if (!isset($this->query)) {
+        if (!isset($this->query[$model])) {
             $class = $this->config['query'];
 
-            $this->query = new $class($this);
+            $this->query[$model] = new $class($this, 'db' == $model ? '' : $model);
         }
 
-        return $this->query;
+        return $this->query[$model];
     }
 
     /**