{"id":1192,"date":"2015-01-04T14:46:56","date_gmt":"2015-01-04T06:46:56","guid":{"rendered":"http:\/\/blog.turn.tw\/?p=1192"},"modified":"2015-01-06T11:03:25","modified_gmt":"2015-01-06T03:03:25","slug":"ddd%e5%af%a6%e6%88%b0%ef%bc%9a%e4%b8%80%e6%ae%b5%e8%a8%82%e5%96%ae%e5%bb%ba%e7%ab%8b%e7%a8%8b%e5%ba%8f","status":"publish","type":"post","link":"https:\/\/blog.turn.tw\/?p=1192","title":{"rendered":"DDD\u5be6\u6230\uff1a\u4e00\u6bb5\u8a02\u55ae\u5efa\u7acb\u7a0b\u5e8f-Part 1"},"content":{"rendered":"<h3>\u9700\u6c42<\/h3>\n<p>\u6211\u516c\u53f8\u70ba\u4e00\u96fb\u5b50\u5546\u52d9\u516c\u53f8\uff0c\u9867\u5ba2\u53ef\u5728\u7db2\u8def\u4e0a\u4e0b\u8a02\u55ae\u8cfc\u8cb7\u5546\u54c1\u3002<br \/>\n\u70ba\u63d0\u4f9b\u51fa\u8272\u9867\u5ba2\u6d88\u8cbb\u9ad4\u9a57\uff0c\u6545\u5141\u8a31\u9867\u5ba2\u53ef\u4e0d\u8a3b\u518a\u4e0d\u767b\u5165\u3001\u76f4\u63a5\u5efa\u7acb\u8a02\u55ae\uff08\u4ed8\u6b3e\u524d\u518d\u8981\u6c42\u767b\u5165\u5373\u53ef\uff09\u3002<\/p>\n<h3>\u539f\u89e3\u6cd5<\/h3>\n<p>* \u5c07\u5df2\u767b\u5165\u4e4b\u9867\u5ba2\u8a02\u55ae\u7d00\u9304\u9867\u5ba2id\uff1b\u672a\u767b\u5165\u4e4b\u9867\u5ba2\u8a02\u55ae\u7d00\u9304session id\u3002<\/p>\n<p>\u5728MVC\u67b6\u69cb\u4e4b\u4e0b\uff0c\u6211\u500b\u4eba\u56b4\u7981\u5728M\u5167\u76f4\u63a5\u64cd\u4f5csession\uff0c\u6240\u4ee5\u6211\u5c07\u5df2\u767b\u5165\u4e4b\u9867\u5ba2\u8a02\u55ae\u5efa\u7acb\u7a0b\u5e8f\u5c01\u88dd\u65bccreateWithUser\u51fd\u5f0f\uff0c\u4e26\u50b3\u5165\u76ee\u524d\u4f7f\u7528\u8005\uff1b\u5c07\u672a\u767b\u5165\u4e4b\u9867\u5ba2\u8a02\u55ae\u5efa\u7acb\u7a0b\u5e8f\u5c01\u88dd\u65bccreateWithSession\u4e26\u50b3\u5165\u7576\u524dsession id\u3002<br \/>\n\u4ee5\u4e0a\u5169\u51fd\u5f0f\u5c6c\u65bcModel\u7bc4\u7587\u3002<br \/>\n\u6211\u63a5\u8457\u5c07\u5224\u65b7\u4f7f\u7528\u8005\u767b\u5165\u8207\u5426\u3001\u4ee5\u53ca\u5224\u65b7\u9867\u5ba2\u662f\u5426\u6709\u300c\u672a\u5b8c\u6210\u8a02\u55ae\u300d\u7684code\u5beb\u5728controller\uff0c\u4e26\u5c01\u88dd\u6210getNewOrderOrCreate\uff08\u62ff\u51fa\u9867\u5ba2\u4e4b\u524d\u672a\u5b8c\u6210\u8a02\u55ae\u3001\u8b93\u9867\u5ba2\u7e7c\u7e8c\u8cb7\u6771\u897f\u3002\u4e0d\u7136\u5c31\u5efa\u7acb\u4e00\u7b46\u65b0\u8a02\u55ae\u3002\uff09<\/p>\n<pre>\r\n<?php\r\n\r\nclass SomeController extends BaseController {\r\n\r\n    private function getNewOrderOrCreate()\r\n    {\r\n\r\n        if (Auth::check()){ \/\/ user is logined\r\n\r\n            $order = Order::ownedByCurrentUser()->inStatus(Order::CREATED_STATUS)->first();\r\n            if ( !$order ){\r\n                $order = Order::createWithUser(Auth::user());\r\n            }        \r\n\r\n        } else { \/\/ use is not logined\r\n\r\n            $order = Order::where('session_id', Session::getId())->inStatus(Order::CREATED_STATUS)->first();\r\n            if ( !$order ){\r\n                $order = Order::createWithSession(Session::getId());\r\n            }\r\n\r\n        }\r\n        return $order;        \r\n    }\r\n\r\n    public function getOrder()\r\n    {              \r\n        $order = $this->getNewOrderOrCreate();\r\n\r\n        return View::make('client\/order', ['order' => $order]);\r\n    }\r\n\r\n}\r\n<\/pre>\n<p>\u554f\u984c\uff1a<br \/>\n* getNewOrderOrCreate\u51fd\u5f0f\u8ca0\u8cac\u592a\u591a\u4e8b\u60c5\uff0ccode\u8b80\u8d77\u4f86\u5341\u5206\u56f0\u96e3<\/p>\n<p>\u5df2\u7d93\u5c07\u5efa\u7acb\u7a0b\u5e8f\u5c01\u88dd\u5728Model\u4e86\uff0ccontroller\u7684code\u9084\u662f\u9019\u9ebc\u96dc\uff0c\u600e\u9ebc\u8fa6\u5462\uff1f<\/p>\n<h3>DDD\u89c0\u9ede<\/h3>\n<p>\u61c9\u8a72\u5b9a\u7fa9\u4e00\u500b\u5c08\u9580\u8ca0\u8cac\u4ee5\u5404\u7a2e\u4e0d\u540c\u65b9\u5f0f\u3001\u53c3\u6578\u53d6\u51fadomain objects\u7684Repository\u985e\u5225\u3002<\/p>\n<p>\u6211\u6c7a\u5b9a\u64b0\u5beb\u4e00\u500bOrderRepository\u985e\u5225\u5c08\u8077\u8655\u7406getNewOrderOrCreate\u8ca0\u8cac\u7684\u4efb\u52d9\uff0c\u4e26\u5728controller\u4e2d\u4f7f\u7528\u9019\u500b\u985e\u5225\uff1a<\/p>\n<pre>\r\n<?php\r\n\r\nclass SomeController extends BaseController {\r\n\r\n    private $orderRepository;\r\n\r\n    public function __construct()\r\n    {\r\n        $this->orderRepository = new OrderRepository();\r\n    }\r\n\r\n    public function getOrder()\r\n    {              \r\n        $order = $this->orderRepository->getNewOrderOrCreate();\r\n\r\n        return View::make('client\/order', ['order' => $order]);\r\n    }\r\n\r\n}\r\n<\/pre>\n<pre>\r\n<?php\r\n\r\nclass OrderRepository\r\n{\r\n\r\n    private function getNewOrderOrCreate()\r\n    {\r\n\r\n        if (Auth::check()){ \/\/ user is logined\r\n\r\n            $order = Order::ownedByCurrentUser()->inStatus(Order::CREATED_STATUS)->first();\r\n            if ( !$order ){\r\n                $order = Order::createWithUser(Auth::user());\r\n            }        \r\n\r\n        } else { \/\/ use is not logined\r\n\r\n            $order = Order::where('session_id', Session::getId())->inStatus(Order::CREATED_STATUS)->first();\r\n            if ( !$order ){\r\n                $order = Order::createWithSession(Session::getId());\r\n            }\r\n\r\n        }\r\n        return $order;        \r\n    }\r\n    \r\n}\r\n\r\n<\/pre>\n<p>controller\u5167\u7684code\u7d42\u65bc\u7c21\u6f54\u591a\u4e86\uff01<br \/>\n\u5982\u679c\u8aaaDDD\u7684repository\u5c0d\u61c9\u5230MVC\uff0c\u662fM\u4e2d\u6700\u9760\u8fd1C\u7684\u4e00\u5c64\u7684\u8a71&#8230;<br \/>\n\u90a3\u9ebcMVC\u5e38\u8981\u6c42\u7684&#8217;skinny controller, fat model&#8217;\u6211\u7d42\u65bc\u505a\u5230\u4e86\u5427\uff01<\/p>\n<p>\u554f\u984c\uff1a<br \/>\n* \u53ea\u662f\u5c07code\u7531C\u79fb\u51fa\uff0cgetNewOrderOrCreate\u96e3\u4ee5\u7406\u89e3\u7684\u554f\u984c\u4f9d\u7136\u5b58\u5728<br \/>\n* \u73fe\u5728repository\u5167\u64cd\u4f5csession\u4e86&#8230;\u6709\u9ede\u50cf\u5728M\u5167\u64cd\u4f5csession\u7684\u611f\u89ba\uff0c\u9019\u4e0d\u5c0d\u5427\uff1f\u4e0d\u662f\u8aaa\u4e86\u56b4\u7981\u55ce\uff1f<\/p>\n<h3>\u53cd\u7701<\/h3>\n<p>getNewOrderOrCreate\u592a\u904e\u542b\u7cca\u4e0d\u6e05\uff0c\u61c9\u8a72\u8b93repository\u5167\u7684\u51fd\u5f0f\u66f4expressive\uff0c\u5149\u770b\u51fd\u5f0f\u540d\u5c31\u5f97\u77e5\u6703\u53d6\u51fa\u4ec0\u9ebc\u6a23\u7684domain objects\u3002\u5426\u5247\uff0c\u4e0d\u4f46\u4e0d\u5920reusable\u3001\u4e5f\u5931\u53bb\u591a\u5beb\u4e00\u5c64repository\u7684\u610f\u7fa9\u3002<\/p>\n<p>\u5169\u9ede\u60f3\u6cd5\uff1a<\/p>\n<p>* \u95dc\u65bcsession\u7684\u64cd\u4f5c\uff0c\u9084\u662f\u8b93\u5b83\u7559\u5728controller\u5167\u5427\u3002<\/p>\n<p>* controller\u5c0d\u61c9\u5230DDD\u89c0\u9ede\u4e0b\uff0c\u8981\u8ca0\u8cacapplication layer\u5927\u90e8\u5206\u7684\u4efb\u52d9\u3002<br \/>\napplication layer\u672c\u4f86\u5c31\u8981\u8ca0\u8cac\u77e5\u9053\u7576\u524d\u63d0\u4f9b\u7684\u61c9\u7528\u8d70\u5230\u54ea\u4e00\u968e\u6bb5\uff08state\uff09\u3002<br \/>\n\u56e0\u6b64\u5230\u5e95\u8981\u53d6\u51fa\u672a\u5b8c\u6210\u8a02\u55ae\u3001\u9084\u662f\u5efa\u7acb\u4e00\u7b46\u65b0\u8a02\u55ae\uff0c\u662fcontroller\u8981\u8ca0\u8cac\u7684\u4e8b\u3002<\/p>\n<pre>\r\n<?php\r\n\r\nclass SomeController extends BaseController {\r\n\r\n    private $orderRepository;\r\n\r\n    public function __construct()\r\n    {\r\n        $this->orderRepository = new OrderRepository();\r\n    }\r\n\r\n    private function getNewOrderOrCreate()\r\n    {\r\n        if (Auth::check()){\r\n\r\n            $order = $this->orderRepository->getNewOrderByUser(Auth::user());\r\n            if ( !$order ){\r\n                $order = Order::createWithUser(Auth::user());\r\n            }\r\n                        \r\n        } else {\r\n            \r\n            $order = $this->orderRepository->getNewOrderBySesssionId(Session::getId());            \r\n            if ( !$order ){\r\n                $order = Order::createWithSession(Session::getId());\r\n            }\r\n\r\n        }\r\n        \r\n        return $order;\r\n    }\r\n\r\n    public function getOrder()\r\n    {              \r\n        $order = $this->getNewOrderOrCreate();\r\n\r\n        return View::make('client\/order', ['order' => $order]);\r\n    }\r\n\r\n}\r\n<\/pre>\n<pre>\r\n<?php\r\n\r\nclass OrderRepository\r\n{\r\n    \r\n    public function getNewOrderByUser(User $user)\r\n    {\r\n        return Order::ownedByUser($user)->inStatus(Order::CREATED_STATUS)->first();\r\n    }\r\n    \r\n    public function getNewOrderBySesssionId($sessionId)\r\n    {\r\n        return Order::where('session_id', $sessionId)->inStatus(Order::CREATED_STATUS)->first();        \r\n    }\r\n    \r\n}\r\n<\/pre>\n<p>\u554f\u984c\uff1a<br \/>\n* controller\u53c8\u6709\u9ede\u8b8a\u56de\u4e00\u958b\u59cb\u90a3\u500b\u9ce5\u6a23\u4e86<br \/>\n* \u96d6\u7136repository\u8b93controller\u5167\u7684code\u66f4\u53ef\u8b80\u4e00\u9ede\u9ede\u4e86&#8230;\uff0c\u4f46\u53cd\u7701\u534a\u5929\u5230\u6700\u5f8c\u53ea\u6709\u9019\u9ebc\u4e00\u9edebenefit\uff0c\u800c\u4e14repository\u5167\u7684\u51fd\u5f0f\u5728\u5176\u4ed6\u5730\u65b9\u672a\u5fc5\u771f\u7684\u6703\u7528\u5230\uff0c\u9019reusability\u4e5f\u8a31\u4e0d\u5fc5\u8981<br \/>\n* \u7d9c\u5408\u4ee5\u4e0a\u5169\u9ede\uff0c\u6211\u53ef\u4e0d\u53ef\u4ee5\u8aaa\u9019\u6839\u672c\u662fover design\u3001over engineering\uff1f<\/p>\n<h3>\u7d50\u8ad6<\/h3>\n<p>\u5982\u60a8\u6240\u898b\uff0c\u5728\u6211\u7684\u7bc4\u4f8b\u4e4b\u4e2d\uff0c\u589e\u52a0\u4e00\u5c64repository\uff0c\u7576\u4e0b\u5f97\u5230\u7684benefit\u4e26\u4e0d\u5927\u3002\u6709\u4e9b\u4eba\u6703\u8a8d\u70ba\u8ddf\u6700\u4e00\u958b\u59cb\u7684code\u6839\u672c\u6c92\u5dee\u591a\u5c11\u3002<\/p>\n<p>\u6839\u64da<a href=\"http:\/\/martinfowler.com\/eaaCatalog\/repository.html\">Martin Fowler\u7684\u4ecb\u7d39<\/a>\uff0c\u7576query logic\u9f90\u5927\u8d77\u4f86\u6642\uff0c\u591a\u52a0\u4e0aRepository\u9019\u5c64\u5c08\u9580\u8ca0\u8cac\u8655\u7406\u9019\u4e9bquery logic\uff0c\u4e0d\u4f46\u53ef\u4ee5\u6e1b\u5c11duplicate code\uff0c\u9084\u53ef\u4ee5\u8b93\u547c\u53eb\u65b9\u547c\u53eb\u6642\u66f4\u6e05\u695a\u81ea\u5df1\u5728\u547c\u53eb\u4ec0\u9ebc\u3002<\/p>\n<p>Repository\u5728DDD\u4e2d\u88ab\u8a8d\u70ba\u662fDomain Layer\u6700\u91cd\u8981\u7684\u7d44\u6210\u4e4b\u4e00\u3002<br \/>\n\u4f55\u6642\u5f15\u9032\u9019\u5c64\uff0c\u5c31\u770b\u7576\u4e0b\u9700\u6c42\u4e86\u3002<\/p>\n<h3>2015-01-04 \u66f4\u65b0<\/h3>\n<p>\u6211\u8d8a\u770b\u90a3\u500bcontroller\u8d8a\u89ba\u5f97\u5f88\u4e0d\u723d\u3002<br \/>\n\u7814\u7a76\u4e86\u4e00\u4e0b\uff0c\u767c\u73feDDD\u7576\u7136\u6709\u6307\u5f15\u9019\u985e\u554f\u984c\u7684\u65b9\u5411\u3002<br \/>\n\u6211\u7f3a\u5c11\u7684\u662fApplication Service\u3002<br \/>\n\u53c3\u898b\uff1a<a href=\"https:\/\/blog.turn.tw\/?p=1217\" title=\"DDD\u5be6\u6230\uff1a\u4e00\u6bb5\u8a02\u55ae\u5efa\u7acb\u7a0b\u5e8f-Part 2\">DDD\u5be6\u6230\uff1a\u4e00\u6bb5\u8a02\u55ae\u5efa\u7acb\u7a0b\u5e8f-Part 2<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9700\u6c42 \u6211\u516c\u53f8\u70ba\u4e00\u96fb\u5b50\u5546\u52d9\u516c\u53f8\uff0c\u9867\u5ba2\u53ef\u5728\u7db2\u8def\u4e0a\u4e0b\u8a02\u55ae\u8cfc\u8cb7\u5546\u54c1\u3002 \u70ba\u63d0\u4f9b\u51fa\u8272\u9867\u5ba2\u6d88\u8cbb\u9ad4\u9a57\uff0c\u6545\u5141\u8a31\u9867\u5ba2\u53ef\u4e0d\u8a3b\u518a\u4e0d\u767b\u5165 &hellip; <a href=\"https:\/\/blog.turn.tw\/?p=1192\" class=\"more-link\">\u7e7c\u7e8c\u95b1\u8b80 <span class=\"screen-reader-text\">DDD\u5be6\u6230\uff1a\u4e00\u6bb5\u8a02\u55ae\u5efa\u7acb\u7a0b\u5e8f-Part 1<\/span> <span class=\"meta-nav\">&rarr;<\/span> <\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false},"categories":[2],"tags":[28,6],"_links":{"self":[{"href":"https:\/\/blog.turn.tw\/index.php?rest_route=\/wp\/v2\/posts\/1192"}],"collection":[{"href":"https:\/\/blog.turn.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.turn.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.turn.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.turn.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1192"}],"version-history":[{"count":27,"href":"https:\/\/blog.turn.tw\/index.php?rest_route=\/wp\/v2\/posts\/1192\/revisions"}],"predecessor-version":[{"id":1232,"href":"https:\/\/blog.turn.tw\/index.php?rest_route=\/wp\/v2\/posts\/1192\/revisions\/1232"}],"wp:attachment":[{"href":"https:\/\/blog.turn.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1192"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.turn.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1192"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.turn.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1192"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}