时间：2021-07-01 10:21:17 帮助过：23人阅读
# RapidDB 轻量级数据库操作组件* 支持事务嵌套* PDO支持* JSON支持* 类的实例集合支持* 轻量级* 可以轻易和其他框架整合* 多数据库多连接支持##使用方式###通过composer安装```$ composer require shiwolang/db```###通过git地址```http://git.oschina.net/shiwolang/RapidDB```###初始化连接**暂仅支持mysql和sqlite**#####单个连接情景```phpDB::init([ 'database_type' => 'mysql', 'database_name' => 'dbname', 'server' => 'localhost', 'username' => 'username', 'password' => 'yourpass', 'charset' => 'utf8']);```#####多个连接情景```phpDB::init([ 'database_type' => 'mysql', 'database_name' => 'dbname', 'server' => 'localhost', 'username' => 'username', 'password' => 'yourpass', 'charset' => 'utf8'], "connection1");```#####PDO设置初始化 单个连接情景```phpDB::init($PDO);```#####PDO设置初始化 多个连接情景```phpDB::init($PDO, "connection1");```###获取数据库连接---------------------------------------#####单个连接情景```phpDB::connection();```#####多个连接情景```phpDB::connection("connection1");```###添加数据(单表)---------------------------------------```php$lastInsertId = DB::connection()->insert("content", [ "title" => "title1", "content" => "content1", "time" => time()]);```###删除数据(单表)---------------------------------------```php$lastInsertId = DB::connection()->delete("content", "id = :id", [":id" => 1]);```###修改数据(单表)---------------------------------------```php$lastInsertId = DB::connection()->update("content", [ "title" => "title1", "content" => "content1", "time" => time()],"id = :id", [":id" => 1]);```###查询数据---------------------------------------**请注意在使用limit的时候的数值务必为整数int型！！**```phpDB::connection()->query("SELECT * FROM content where title = 'title1' LIMIT 10")->all();DB::connection()->query("SELECT * FROM content WHERE title = :title LIMIT :limit", [ ":title" => "title1", ":limit" => 10])->all();DB::connection()->query("SELECT * FROM content WHERE id = ? LIMIT ?", ["title1", 10])->all();```####设置获取模式#####设置为数组的获取方式（默认方式）```phpDB::connection()->query("SELECT * FROM content where title = 'title1' LIMIT 10")->all();```#####设置为类的实例集合的获取方式```phpDB::connection()->query("SELECT * FROM content where title = 'title1' LIMIT 10")->bindToClass(Content::class)->all();DB::connection()->query("SELECT * FROM content where title = 'title1' LIMIT 10")->all(Content::class);```#####将每行的列作为参数传递给指定的函数，并返回调用函数后的结果的获取方式```phpDB::connection()->query("SELECT * FROM content where title = 'title1' LIMIT 10")->all(function($title, $content, $time){ return [ "title" => $title, "content" => $content, "time" => date("Y-m-d H:i:s", $time) ];});```#####按相关的结果集中获取下一行数组获取方式```phpDB::connection()->query("SELECT * FROM content LIMIT 10")->each(function ($row) { print_r($row);});```类的实例获取方式```phpDB::connection()->query("SELECT * FROM content LIMIT 10")->each(function ($row) { print_r($row);}, Content::class);```#####JSON格式数据数组获取方式的json```phpDB::connection()->query("SELECT * FROM content LIMIT 10")->json();```类的实例集合获取方式的json **！！请注意！！ DB::json(&$fetchResult = null, $className = null, $args = []) 第一个形参为返回的结果集，并不是绑定的类名！！**```phpDB::connection()->query("SELECT * FROM content LIMIT 10")->json($data, Content::className());```**！！注！！**json数据获取中当获取方式为对象集合的方式时，支持数据自动格式化，可以使用@json注解来注解类中的一个公共方法，对应的json键名为这个方法的首字符小写的[去掉get字符后(如果含有)]方法名称；同样可以实现ObjectContainerInterface和\JsonSerializable 接口并使用Statement::setJsonObjectContainerClassName($jsonObjectContainerClassName)进行对象集合容器的自定义设置###事务的支持-----------------------**此功能依赖数据事务功能**#####事务使用声明方式```php$db = DB::connection();$db->beginTransaction();try { $lastInsertId = $db->insert("content", [ "title" => "title1", "content" => "content1", "time" => time() ]); $db->commit();} catch (\Exception $e) { $db->rollBack(); throw $e;}```#####事务使用声明方式支持无限级嵌套```php$db = DB::connection();$db->beginTransaction();try { try { $lastInsertId = $db->insert("content", [ "title" => "title1", "content" => "content1", "time" => time() ]); $db->commit(); } catch (\Exception $e) { $db->rollBack(); throw $e; } $lastInsertId = $db->insert("content", [ "title" => "title2", "content" => "content2", "time" => time() ]); $db->beginTransaction(); try { $lastInsertId = $db->insert("content", [ "title" => "title3", "content" => "content3", "time" => time() ]); $db->commit(); } catch (\Exception $e) { $db->rollBack(); throw $e; } $db->commit();} catch (\Exception $e) { $db->rollBack(); throw $e;}```#####事务使用回调函数方式，支持无限级嵌套```phpDB::connection()->transaction(function () { DB::connection()->transaction(function () { DB::connection()->insert("content", [ "title" => "title1", "content" => "content1", "time" => time() ]); } }); DB::connection()->insert("content", [ "title" => "title2", "content" => "content2", "time" => time() ]); DB::connection()->transaction(function () { DB::connection()->insert("content", [ "title" => "title3", "content" => "content3", "time" => time() ]); } }); }});```###执行记录查询-----------------------#####获取所有执行记录```phpDB::connection()->query("SELECT * FROM content LIMIT 1")->all();DB::connection()->query("SELECT * FROM content WHERE title = :title LIMIT :limit", [ ":title" => "title1", ":limit" => 10])->all();;print_r(DB::connection()->getLog());```#####单条未执行的sql```php$sql = DB::connection()->query("SELECT * FROM content WHERE title = :title LIMIT :limit", [ ":title" => "title1", ":limit" => 10], true);```##附录#####Content类```phpclass Content{ private $id; private $title; private $content; /** * @return mixed */ public function getId() { return $this->id; } /** * @param mixed $id */ public function setId($id) { $this->id = $id; } /** * @return mixed */ public function getTitle() { return $this->title; } /** * @param mixed $title */ public function setTitle($title) { $this->title = $title; } /** * For json formater * @json * @return mixed */ public function getContent() { return $this->content . "_nihao"; } /** * @param mixed $content */ public function setContent($content) { $this->content = $content; } public function __get($name) { $getter = 'get' . self::camelName($name); if (method_exists($this, $getter)) { return $this->$getter(); } throw new \Exception('Getting unknown property: ' . get_class($this) . '::' . $name); } public function __set($name, $value) { $setter = 'set' . self::camelName($name); if (method_exists($this, $setter)) { $this->$setter($value); return; } throw new \Exception('Setting unknown property: ' . get_class($this) . '::' . $name); } protected static function camelName($name, $ucfirst = true) { if (strpos($name, "_") !== false) { $name = str_replace("_", " ", strtolower($name)); $name = ucwords($name); $name = str_replace(" ", "", $name); } return $ucfirst ? ucfirst($name) : $name; }}```#####数据库创建语句```sqlCREATE TABLE `content` ( `id` int(11) NOT NULL AUTO_INCREMENT, `title` varchar(255) DEFAULT NULL, `content` varchar(255) DEFAULT NULL, `time` int(10) DEFAULT NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8```