{"id":200105,"date":"2025-05-06T10:10:05","date_gmt":"2025-05-06T02:10:05","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200105\/"},"modified":"2025-05-06T10:10:05","modified_gmt":"2025-05-06T02:10:05","slug":"%e4%bc%98%e5%8c%96-laravel-%e5%92%8c-mysql-%e4%b8%ad%e7%9a%84%e6%9f%a5%e8%af%a2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200105\/","title":{"rendered":"\u4f18\u5316 laravel \u548c mysql \u4e2d\u7684\u67e5\u8be2"},"content":{"rendered":"

<\/b> <\/p>\n

\u4f18\u5316 laravel \u548c mysql \u4e2d\u7684\u67e5\u8be2<\/h1>\n

\u600e\u4e48\u5165\u95e8\u6570\u636e\u5e93\u7f16\u7a0b\uff1f\u9700\u8981\u5b66\u4e60\u54ea\u4e9b\u77e5\u8bc6\u70b9\uff1f\u8fd9\u662f\u65b0\u624b\u4eec\u521a\u63a5\u89e6\u7f16\u7a0b\u65f6\u5e38\u89c1\u7684\u95ee\u9898\uff1b\u4e0b\u9762\u4e3b\u673a\u5b9d\u8d1d\u5c31\u6765\u7ed9\u5927\u5bb6\u6574\u7406\u5206\u4eab\u4e00\u4e9b\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u591f\u7ed9\u521d\u5b66\u8005\u4e00\u4e9b\u5e2e\u52a9\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u4ecb\u7ecd\u300a\u4f18\u5316 laravel \u548c mysql \u4e2d\u7684\u67e5\u8be2\u300b\uff0c\u6d89\u53ca\u5230\uff0c\u6709\u9700\u8981\u7684\u53ef\u4ee5\u6536\u85cf\u4e00\u4e0b<\/p>\n

<\/p>\n

\u4f18\u5316 Laravel \u4e2d\u5927\u578b\u6570\u636e\u96c6\u7684\u67e5\u8be2\u6d89\u53ca\u591a\u79cd\u63d0\u9ad8\u6027\u80fd\u548c\u6548\u7387\u7684\u7b56\u7565\u3002\u4ee5\u4e0b\u662f\u60a8\u53ef\u4ee5\u4f7f\u7528\u7684\u4e00\u4e9b\u5173\u952e\u6280\u672f\uff1a<\/p>\n

    \n
  1. \u9ad8\u6548\u4f7f\u7528\u53e3\u624d \u9009\u62e9\u7279\u5b9a\u5217\uff1a\u4ec5\u9009\u62e9\u60a8\u9700\u8981\u7684\u5217\uff0c\u4ee5\u6700\u5927\u7a0b\u5ea6\u5730\u51cf\u5c11\u68c0\u7d22\u7684\u6570\u636e\u91cf\u3002 <\/li>\n<\/ol>\n
    $users = User::select('id', 'name', 'email')->get();\n\n<\/pre>\n
    Eager Loading\uff1a\u4f7f\u7528Eager Loading\u6765\u9632\u6b62N+1\u67e5\u8be2\u95ee\u9898\u3002<\/p>\n
    $users = User::with('posts', 'comments')->get();\n<\/pre>\n
      \n
    1. \u4f7f\u7528\u67e5\u8be2\u751f\u6210\u5668 \u5bf9\u4e8e\u590d\u6742\u7684\u67e5\u8be2\uff0c\u67e5\u8be2\u751f\u6210\u5668\u6bd4 Eloquent \u66f4\u9ad8\u6548\u3002 <\/li>\n<\/ol>\n
      $users = DB::table('users')->where('status', 'active')->get();\n<\/pre>\n
        \n
      1. \u5206\u9875 \u4f7f\u7528\u5206\u9875\u6765\u5206\u5757\u52a0\u8f7d\u6570\u636e\uff0c\u800c\u4e0d\u662f\u4e00\u6b21\u68c0\u7d22\u6240\u6709\u8bb0\u5f55\u3002 <\/li>\n<\/ol>\n
        $users = User::paginate(50);\n<\/pre>\n
          \n
        1. \u7d22\u5f15 \u786e\u4fdd\u60a8\u7684\u6570\u636e\u5e93\u8868\u5728\u7ecf\u5e38\u67e5\u8be2\u7684\u5217\u4e0a\u6709\u9002\u5f53\u7684\u7d22\u5f15\u3002 <\/li>\n<\/ol>\n
          Schema::table('users', function (Blueprint $table) {\n    $\u8868->\u7d22\u5f15('\u7535\u5b50\u90ae\u4ef6');\n});\n<\/pre>\n
            \n
          1. \u5206\u5757 \u4e3a\u4e86\u5904\u7406\u5927\u578b\u6570\u636e\u96c6\uff0c\u8bf7\u4f7f\u7528\u5206\u5757\u6765\u5904\u7406\u8f83\u5c0f\u7247\u6bb5\u7684\u8bb0\u5f55\u3002 <\/li>\n<\/ol>\n
            User::chunk(100, \u51fd\u6570 ($users) {\n    foreach ($users \u4f5c\u4e3a $user) {\n        \/\/ \u5904\u7406\u6bcf\u4e2a\u7528\u6237\n    }\n});\n<\/pre>\n
              \n
            1. \u7f13\u5b58 \u7f13\u5b58\u9891\u7e41\u8fd0\u884c\u7684\u67e5\u8be2\u7684\u7ed3\u679c\u4ee5\u51cf\u5c11\u6570\u636e\u5e93\u8d1f\u8f7d\u3002 <\/li>\n<\/ol>\n
              $users = Cache::remember('active_users', 60, function () {\n    return User::where('status', 'active')->get();\n});\n<\/pre>\n
                \n
              1. \u4f7f\u7528\u539f\u59cb\u67e5\u8be2\u8fdb\u884c\u590d\u6742\u64cd\u4f5c \u5bf9\u4e8e\u975e\u5e38\u590d\u6742\u7684\u67e5\u8be2\uff0c\u4f7f\u7528\u539f\u59cb SQL \u6709\u65f6\u4f1a\u66f4\u6709\u6548\u3002 <\/li>\n<\/ol>\n
                $users = DB::select('SELECT * FROM users WHERE status = ?', ['active']);\n<\/pre>\n
                  \n
                1. \u4f18\u5316\u6570\u636e\u5e93\u914d\u7f6e \u786e\u4fdd\u60a8\u7684\u6570\u636e\u5e93\u914d\u7f6e\u4e3a\u6700\u4f73\u6027\u80fd\uff1a<\/li>\n<\/ol>\n
                    \n
                  • \u589e\u52a0\u5185\u5b58\u9650\u5236\u3002<\/li>\n
                  • \u8c03\u6574\u7f13\u51b2\u533a\/\u7f13\u5b58\u5927\u5c0f\u3002<\/li>\n
                  • \u4f7f\u7528\u9002\u5f53\u7684\u5b58\u50a8\u5f15\u64ce\u3002<\/li>\n<\/ul>\n
                      \n
                    1. \u5206\u6790\u548c\u5206\u6790\u67e5\u8be2 \u4f7f\u7528 Laravel \u7684\u67e5\u8be2\u65e5\u5fd7\u6765\u5206\u6790\u548c\u5206\u6790\u60a8\u7684\u67e5\u8be2\u3002 <\/li>\n<\/ol>\n
                      DB::enableQueryLog();\n\/\/ \u8fd0\u884c\u60a8\u7684\u67e5\u8be2\n$users = User::all();\n$queries = DB::getQueryLog();\ndd($\u67e5\u8be2);\n<\/pre>\n
                        \n
                      1. \u907f\u514dN+1\u95ee\u9898 \u786e\u4fdd\u60a8\u6ca1\u6709\u5728\u5faa\u73af\u4e2d\u8fdb\u884c\u5176\u4ed6\u67e5\u8be2\u3002 <\/li>\n<\/ol>\n
                        \/\/ \u4e0d\u597d\uff1aN+1 \u95ee\u9898\n$users = User::all();\nforeach ($users \u4f5c\u4e3a $user) {\n    echo $\u7528\u6237->\u4e2a\u4eba\u8d44\u6599->\u4e2a\u4eba\u7b80\u4ecb;\n}\n\n\/\/ \u597d\uff1a\u6e34\u671b\u52a0\u8f7d\n$users = User::with('profile')->get();\nforeach ($users \u4f5c\u4e3a $user) {\n    echo $\u7528\u6237->\u4e2a\u4eba\u8d44\u6599->\u4e2a\u4eba\u7b80\u4ecb;\n}\n<\/pre>\n
                        \u4f18\u5316\u590d\u6742\u67e5\u8be2
                         \u5047\u8bbe\u60a8\u9700\u8981\u83b7\u53d6\u7528\u6237\u7684\u5e16\u5b50\u548c\u8bc4\u8bba\uff0c\u5e76\u4e14\u60a8\u60f3\u4f18\u5316\u6b64\u64cd\u4f5c\uff1a<\/p>\n
                        $users = User::select('id', '\u59d3\u540d', '\u7535\u5b50\u90ae\u4ef6')\n    ->with(['posts' => \u51fd\u6570 ($query) {\n        $query->select('id', 'user_id', '\u6807\u9898')\n              ->with(['comments' => function ($query) {\n                  $query->select('id', 'post_id', '\u5185\u5bb9');\n              }]);\n    }])\n    ->\u5206\u9875(50);\n<\/pre>\n
                        \u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u4f18\u5316 laravel \u548c mysql \u4e2d\u7684\u67e5\u8be2\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n
                         \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb \u5220\u9664 <\/p>\n
                        \n
                        \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
                        \u4f18\u5316 laravel \u548c mys...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-200105","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200105","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=200105"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200105\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200105"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200105"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200105"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}