改进Model类的db方法 并增加query属性

library/think/Model.php

@@ -34,6 +34,8 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
     protected $name;
     // 数据表名称
     protected $table;
+    // 查询对象
+    protected $query;
     // 回调事件
     protected static $event = [];
 
@@ -99,10 +101,14 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
         } else {
             $this->data = $data;
         }
+
         if (empty($this->name)) {
             $this->name = basename(str_replace('\\', '/', get_class($this)));
         }
 
+        // 当前模型的查询对象
+        $this->query = $this->db();
+        // 执行初始化操作
         $this->initialize();
     }
 
@@ -233,7 +239,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
     public function getPk($table = '')
     {
         if (empty($this->pk)) {
-            $this->pk = self::db()->getTableInfo($table, 'pk');
+            $this->pk = $this->query->getTableInfo($table, 'pk');
         }
         return $this->pk;
     }
@@ -301,7 +307,6 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
             return false;
         }
 
-        $db = self::db();
         if ($this->isUpdate) {
             // 自动更新
             $this->autoCompleteData($this->update);
@@ -330,7 +335,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
                 }
             }
 
-            $result = $db->where($where)->update($data);
+            $result = $this->query->where($where)->update($data);
 
             // 更新回调
             $this->trigger('after_update', $this);
@@ -347,11 +352,11 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
                 return false;
             }
 
-            $result = $db->insert($this->data);
+            $result = $this->query->insert($this->data);
 
             // 获取自动增长主键
             if ($result && $getId) {
-                $insertId = $db->getLastInsID();
+                $insertId = $this->query->getLastInsID();
                 $pk       = $this->getPk();
                 if (is_string($pk) && $insertId) {
                     $this->data[$pk] = $insertId;
@@ -443,7 +448,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
             return false;
         }
 
-        $result = self::db()->delete($this->data);
+        $result = $this->query->delete($this->data);
 
         $this->trigger('after_delete', $this);
         return $result;
@@ -648,15 +653,16 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
      */
     public static function destroy($data)
     {
-        $db = self::db();
+        $model = new static();
+        $query = $model->db();
         if (is_array($data) && key($data) !== 0) {
-            $db->where($data);
+            $query->where($data);
             $data = [];
         } elseif ($data instanceof \Closure) {
-            call_user_func_array($data, [ & $db]);
+            call_user_func_array($data, [ & $query]);
             $data = [];
         }
-        $resultSet = $db->select($data);
+        $resultSet = $query->select($data);
         $result    = false;
         if ($resultSet) {
             foreach ($resultSet as $data) {
@@ -676,9 +682,9 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
     public static function scope($name, $params = [])
     {
         $model = new static();
-        $class = self::db();
+        $query = $model->db();
         if ($name instanceof \Closure) {
-            call_user_func_array($name, [ & $class, $params]);
+            call_user_func_array($name, [ & $query, $params]);
         } elseif ($name instanceof Query) {
             return $name;
         } else {
@@ -686,7 +692,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
             foreach ($names as $scope) {
                 $method = 'scope' . $scope;
                 if (method_exists($model, $method)) {
-                    $model->$method($class, $params);
+                    $model->$method($query, $params);
                 }
             }
         }
@@ -704,10 +710,10 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
      */
     public static function has($relation, $operator = '>=', $count = 1, $id = '*')
     {
-        $class = new static();
-        $info  = $class->$relation()->getRelationInfo();
+        $model = new static();
+        $info  = $model->$relation()->getRelationInfo();
         $table = $info['model']::getTable();
-        return self::db()->alias('a')
+        return $model->db()->alias('a')
             ->join($table . ' b', 'a.' . $info['localKey'] . '=b.' . $info['foreignKey'])
             ->group('b.' . $info['foreignKey'])
             ->having('count(' . $id . ')' . $operator . $count);
@@ -722,8 +728,8 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
      */
     public static function hasWhere($relation, $where = [])
     {
-        $class = new static();
-        $info  = $class->$relation()->getRelationInfo();
+        $model = new static();
+        $info  = $model->$relation()->getRelationInfo();
         $table = $info['model']::getTable();
         if (is_array($where)) {
             foreach ($where as $key => $val) {
@@ -733,7 +739,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
                 }
             }
         }
-        return self::db()->alias('a')
+        return $model->db()->alias('a')
             ->field('a.*')
             ->join($table . ' b', 'a.' . $info['localKey'] . '=b.' . $info['foreignKey'])
             ->where($where);
@@ -870,28 +876,25 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
     }
 
     /**
-     * 初始化数据库对象
-     * @access protected
+     * 获取当前模型的数据库查询对象
+     * @access public
      * @return \think\db\Query
      */
-    protected static function db()
+    public function db()
     {
         $model = get_called_class();
         if (!isset(self::$links[$model])) {
-            $class = new static();
-
             // 设置当前模型 确保查询返回模型对象
-            self::$links[$model] = Db::connect($class->connection)->model($model);
+            $query = Db::connect($this->connection)->model($model);
 
             // 设置当前数据表和模型名
-            if (!empty($class->table)) {
-                self::$links[$model]->setTable($class->table);
+            if (!empty($this->table)) {
+                $query->setTable($this->table);
             } else {
-                $name = !empty($class->name) ? $class->name : basename(str_replace('\\', '/', $model));
-                self::$links[$model]->name($name);
+                $query->name($this->name);
             }
+            self::$links[$model] = $query;
         }
-
         // 返回当前模型的数据库查询对象
         return self::$links[$model];
     }
@@ -901,18 +904,23 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
         if (method_exists($this, 'scope' . $method)) {
             // 动态调用命名范围
             $method = 'scope' . $method;
-            $class  = self::db();
-            array_unshift($args, $class);
+            array_unshift($args, $this->query);
             call_user_func_array([$this, $method], $args);
             return $this;
         } else {
-            return call_user_func_array([self::db(), $method], $args);
+            return call_user_func_array([$this->query, $method], $args);
         }
     }
 
     public static function __callStatic($method, $params)
     {
-        return call_user_func_array([self::db(), $method], $params);
+        $model = get_called_class();
+        if (!isset(self::$links[$model])) {
+            $class               = new static();
+            self::$links[$model] = $class->db();
+        }
+        $query = self::$links[$model];
+        return call_user_func_array([$query, $method], $params);
     }
 
     /**
@@ -926,7 +934,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
     {
         if (is_null($this->fieldType)) {
             // 获取字段类型信息并缓存
-            $this->fieldType = self::db()->getTableInfo('', 'type');
+            $this->fieldType = $this->query->getTableInfo('', 'type');
         }
         if (is_null($value) && $this->autoWriteTimestamp && in_array($name, [$this->createTime, $this->updateTime, $this->deleteTime])) {
             // 自动写入的时间戳字段

library/think/model/Merge.php

@@ -61,14 +61,14 @@ class Merge extends Model
     {
         $class  = new static();
         $master = $class->name;
-        $fields = self::getModelField($master, '', $class->mapFields);
+        $fields = self::getModelField($query, $master, '', $class->mapFields);
         $query->alias($master)->field($fields);
 
         foreach (static::$relationModel as $key => $model) {
             $name  = is_int($key) ? $model : $key;
             $table = is_int($key) ? $query->getTable($name) : $model;
             $query->join($table . ' ' . $name, $name . '.' . $class->fk . '=' . $master . '.' . $class->getPk());
-            $fields = self::getModelField($name, $table, $class->mapFields);
+            $fields = self::getModelField($query, $name, $table, $class->mapFields);
             $query->field($fields);
         }
         return $query;
@@ -77,15 +77,16 @@ class Merge extends Model
     /**
      * 获取关联模型的字段 并解决混淆
      * @access protected
+     * @param \think\db\Query $query 查询对象
      * @param string $name 模型名称
      * @param string $table 关联表名称
      * @param array $map 字段映射
      * @return array
      */
-    protected static function getModelField($name, $table = '', $map = [])
+    protected static function getModelField($query, $name, $table = '', $map = [])
     {
         // 获取模型的字段信息
-        $fields = self::db()->getTableInfo($table, 'fields');
+        $fields = $query->getTableInfo($table, 'fields');
         $array  = [];
         foreach ($fields as $field) {
             if ($key = array_search($name . '.' . $field, $map)) {
@@ -163,11 +164,16 @@ class Merge extends Model
         }
         // 数据自动完成
         $this->autoCompleteData($this->auto);
+
+        // 自动写入更新时间
+        if ($this->autoWriteTimestamp) {
+            $this->__set($this->updateTime, null);
+        }
+
         // 处理模型数据
         $data = $this->parseData($this->name, $this->data);
 
-        $db = self::db();
-        $db->startTrans('merge_save_' . $this->name);
+        $this->query->startTrans('merge_save_' . $this->name);
         try {
             if ($this->isUpdate) {
                 // 自动写入
@@ -178,15 +184,15 @@ class Merge extends Model
                 }
 
                 // 写入主表数据
-                $result = $db->strict(false)->update($data);
+                $result = $this->query->strict(false)->update($data);
 
                 // 写入附表数据
                 foreach (static::$relationModel as $key => $model) {
                     $name  = is_int($key) ? $model : $key;
-                    $table = is_int($key) ? $db->getTable($model) : $model;
+                    $table = is_int($key) ? $this->query->getTable($model) : $model;
                     // 处理关联模型数据
                     $data  = $this->parseData($name, $this->data);
-                    $query = clone $db;
+                    $query = clone $this->query;
                     $query->table($table)->strict(false)->where($this->fk, $this->data[$this->getPk()])->update($data);
                 }
                 // 新增回调
@@ -195,6 +201,11 @@ class Merge extends Model
                 // 自动写入
                 $this->autoCompleteData($this->insert);
 
+                // 自动写入创建时间
+                if ($this->autoWriteTimestamp) {
+                    $this->__set($this->createTime, null);
+                }
+
                 if (false === $this->trigger('before_insert', $this)) {
                     return false;
                 }
@@ -209,10 +220,10 @@ class Merge extends Model
                     // 写入附表数据
                     foreach (static::$relationModel as $key => $model) {
                         $name  = is_int($key) ? $model : $key;
-                        $table = is_int($key) ? $db->getTable($model) : $model;
+                        $table = is_int($key) ? $this->query->getTable($model) : $model;
                         // 处理关联模型数据
                         $data  = $this->parseData($name, $this->data, true);
-                        $query = clone $db;
+                        $query = clone $this->query;
                         $query->table($table)->strict(false)->insert($data);
                     }
                     $result = $insertId;
@@ -220,10 +231,10 @@ class Merge extends Model
                 // 新增回调
                 $this->trigger('after_insert', $this);
             }
-            $db->commit('merge_save_' . $this->name);
+            $this->query->commit('merge_save_' . $this->name);
             return $result;
         } catch (\PDOException $e) {
-            $db->rollback();
+            $this->query->rollback();
             return false;
         }
     }
@@ -238,26 +249,26 @@ class Merge extends Model
         if (false === $this->trigger('before_delete', $this)) {
             return false;
         }
-        $db = self::db();
-        $db->startTrans('merge_delete_' . $this->name);
+
+        $this->query->startTrans('merge_delete_' . $this->name);
         try {
-            $result = $db->delete($this->data);
+            $result = $this->query->delete($this->data);
             if ($result) {
                 // 获取主键数据
                 $pk = $this->data[$this->getPk()];
 
                 // 删除关联数据
                 foreach (static::$relationModel as $key => $model) {
-                    $table = is_int($key) ? $db->getTable($model) : $model;
-                    $query = clone $db;
+                    $table = is_int($key) ? $this->query->getTable($model) : $model;
+                    $query = clone $this->query;
                     $query->table($table)->where($this->fk, $pk)->delete();
                 }
             }
             $this->trigger('after_delete', $this);
-            $db->commit('merge_delete_' . $this->name);
+            $this->query->commit('merge_delete_' . $this->name);
             return $result;
         } catch (\PDOException $e) {
-            $db->rollback();
+            $this->query->rollback();
             return false;
         }
     }

library/think/model/Relation.php

@@ -593,7 +593,7 @@ class Relation
     {
         if ($this->model) {
             $model = new $this->model;
-            $db    = $model::db();
+            $db    = $model->db();
             if (self::HAS_MANY == $this->type && isset($this->parent->{$this->localKey})) {
                 // 关联查询带入关联条件
                 $db->where($this->foreignKey, $this->parent->{$this->localKey});