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<?php |
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// +---------------------------------------------------------------------- |
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// | ThinkPHP [ WE CAN DO IT JUST THINK ] |
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// +---------------------------------------------------------------------- |
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// | Copyright (c) 2006~2019 http://thinkphp.cn All rights reserved. |
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// +---------------------------------------------------------------------- |
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 ) |
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// +---------------------------------------------------------------------- |
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// | Author: liu21st <[email protected]> |
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// +---------------------------------------------------------------------- |
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declare (strict_types = 1); |
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namespace think; |
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use think\db\Connection; |
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use think\db\Raw; |
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class Db |
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{ |
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/** |
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* 当前数据库连接对象 |
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* @var Connection |
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*/ |
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protected $connection; |
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/** |
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* 数据库配置 |
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* @var array |
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*/ |
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protected $config = []; |
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/** |
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* 读取主库 |
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* @var array |
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*/ |
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protected $readMaster = []; |
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/** |
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* 查询次数 |
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* @var int |
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*/ |
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protected $queryTimes = 0; |
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/** |
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* 架构函数 |
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* @param array $config 连接配置 |
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* @access public |
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*/ |
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public function __construct(array $config = []) |
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{ |
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if (empty($config['query'])) { |
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$config['query'] = '\\think\\db\\Query'; |
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} |
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$this->config = $config; |
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$this->connect($config); |
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} |
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public static function __make(Config $config) |
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{ |
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return new static($config->get('database')); |
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} |
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/** |
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* 切换数据库连接 |
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* @access public |
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* @param mixed $config 连接配置 |
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* @param bool|string $name 连接标识 true 强制重新连接 |
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* @return $this|object |
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* @throws Exception |
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*/ |
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public function connect($config = [], $name = false) |
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{ |
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$this->connection = Connection::instance($this->parseConfig($config), $name); |
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return $this; |
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} |
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/** |
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* 设置从主库读取数据 |
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* @access public |
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* @param string $table 数据表 |
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* @return $this |
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*/ |
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public function readMaster(string $table = '*') |
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{ |
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$this->readMaster[$table] = true; |
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return $this; |
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} |
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/** |
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* 是否从主库读取数据 |
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* @access public |
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* @param string $table 数据表 |
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* @return bool |
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*/ |
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public function isReadMaster(string $table): bool |
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{ |
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return isset($this->readMaster['*']) || isset($this->readMaster[$table]); |
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} |
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/** |
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* 使用表达式设置数据 |
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* @access public |
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* @param string $value 表达式 |
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* @return Raw |
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*/ |
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public function raw(string $value): Raw |
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{ |
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return new Raw($value); |
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} |
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/** |
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* 更新查询次数 |
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* @access public |
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* @return void |
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*/ |
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public function updateQueryTimes(): void |
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{ |
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$this->queryTimes++; |
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} |
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/** |
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* 获得查询次数 |
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* @access public |
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* @return integer |
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*/ |
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public function getQueryTimes(): int |
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{ |
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return $this->queryTimes; |
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} |
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/** |
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* 数据库连接参数解析 |
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* @access private |
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* @param mixed $config |
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* @return array |
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*/ |
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private function parseConfig($config): array |
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{ |
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if (empty($config)) { |
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$config = $this->config; |
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} elseif (is_string($config)) { |
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// 支持读取配置参数 |
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$config = $this->config[$config] ?? null; |
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} |
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return $config; |
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} |
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/** |
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* 获取数据库的配置参数 |
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* @access public |
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* @param string $name 参数名称 |
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* @return mixed |
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*/ |
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public function getConfig(string $name = '') |
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{ |
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return $name ? ($this->config[$name] ?? null) : $this->config; |
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} |
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/** |
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* 创建一个新的Connection对象 |
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* @access public |
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* @param mixed $connection 连接配置信息 |
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* @return mixed |
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*/ |
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public function buildConnection($connection) |
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{ |
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return Connection::instance($this->parseConfig($connection)); |
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} |
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/** |
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* 创建一个新的查询对象 |
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* @access public |
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* @param string $query 查询对象类名 |
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* @param mixed $connection 连接配置信息 |
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* @return mixed |
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*/ |
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public function buildQuery(string $query, $connection) |
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{ |
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$connection = $this->buildConnection($connection); |
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return new $query($connection); |
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} |
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public function __call($method, $args) |
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{ |
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$class = $this->config['query']; |
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$query = new $class($this->connection); |
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return call_user_func_array([$query, $method], $args); |
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} |
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} |
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