{"id":22783,"date":"2024-11-21T09:37:07","date_gmt":"2024-11-21T01:37:07","guid":{"rendered":"https:\/\/fwq.ai\/blog\/22783\/"},"modified":"2024-11-21T09:37:07","modified_gmt":"2024-11-21T01:37:07","slug":"laravel%e4%bc%98%e5%8c%96%e6%9f%a5%e8%af%a2%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/22783\/","title":{"rendered":"laravel\u4f18\u5316\u67e5\u8be2\u8bed\u53e5"},"content":{"rendered":"<p>laravel \u662f\u4e00\u6b3e\u529f\u80fd\u5f3a\u5927\u3001\u6613\u4e8e\u7ef4\u62a4\u7684 php \u6846\u67b6\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e web \u5f00\u53d1\u3002\u7136\u800c\uff0c\u968f\u7740\u6570\u636e\u7684\u589e\u957f\uff0c\u67e5\u8be2\u8bed\u53e5\u7684\u6027\u80fd\u4f1a\u9010\u6e10\u53d8\u5f97\u7f13\u6162\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5f71\u54cd\u5e94\u7528\u7684\u54cd\u5e94\u65f6\u95f4\u548c\u7528\u6237\u4f53\u9a8c\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f18\u5316 laravel \u4e2d\u7684\u67e5\u8be2\u8bed\u53e5\uff0c\u4ee5\u63d0\u5347\u5e94\u7528\u7684\u6027\u80fd\u3002<\/p>\n<ol>\n<li>\u4f7f\u7528\u5408\u9002\u7684 Eloquent \u67e5\u8be2\u65b9\u6cd5<\/li>\n<\/ol>\n<p>Laravel \u63d0\u4f9b\u4e86\u4e00\u5957\u5f3a\u5927\u7684 ORM\uff08\u5bf9\u8c61\u5173\u7cfb\u6620\u5c04\uff09\u6846\u67b6\uff0c\u5373 Eloquent\u3002Eloquent \u67e5\u8be2\u65b9\u6cd5\u901a\u5e38\u6bd4\u624b\u52a8\u7f16\u5199\u67e5\u8be2\u8bed\u53e5\u66f4\u7b80\u6d01\uff0c\u800c\u4e14\u53ef\u4ee5\u8f7b\u677e\u5904\u7406\u590d\u6742\u7684\u5173\u7cfb\u67e5\u8be2\u3002Laravel \u4e2d\u7684 Eloquent \u67e5\u8be2\u65b9\u6cd5\u4e5f\u56e0\u6b64\u6210\u4e3a\u6700\u53d7\u6b22\u8fce\u7684\u6570\u636e\u8bbf\u95ee\u65b9\u5f0f\u4e4b\u4e00\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684 Eloquent \u67e5\u8be2\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li>all()\uff1a\u8fd4\u56de\u6240\u6709\u7b26\u5408\u6761\u4ef6\u7684\u8bb0\u5f55\u3002<\/li>\n<li>find()\uff1a\u8fd4\u56de\u5355\u4e2a\u8bb0\u5f55\uff0c\u6839\u636e\u4e3b\u952e\u67e5\u627e\u3002<\/li>\n<li>where()\uff1a\u7528\u4e8e\u8bbe\u7f6e\u67e5\u8be2\u6761\u4ef6\u3002<\/li>\n<li>orderBy()\uff1a\u6839\u636e\u6307\u5b9a\u5b57\u6bb5\u6392\u5e8f\u3002<\/li>\n<li>select()\uff1a\u6307\u5b9a\u67e5\u8be2\u8981\u8fd4\u56de\u7684\u5217\u3002<\/li>\n<li>join()\uff1a\u7528\u4e8e\u8fde\u63a5\u8868\u3002<\/li>\n<li>groupBy()\uff1a\u6839\u636e\u5b57\u6bb5\u5206\u7ec4\u3002<\/li>\n<li>count()\uff1a\u8fd4\u56de\u7b26\u5408\u6761\u4ef6\u7684\u8bb0\u5f55\u6570\u3002<\/li>\n<\/ul>\n<p>\u5176\u4e2d\uff0c\u4f7f\u7528 where() \u65b9\u6cd5\u8bbe\u7f6e\u67e5\u8be2\u6761\u4ef6\u975e\u5e38\u91cd\u8981\u3002\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8bbe\u7f6e\u591a\u4e2a\u6761\u4ef6\uff0c\u5e76\u4f7f\u7528\u4e00\u7cfb\u5217\u7684\u903b\u8f91\u8fd0\u7b97\u7b26\u8054\u5408\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u67e5\u8be2\u6240\u6709\u540d\u79f0\u4ee5\u201cj\u201d\u5f00\u5934\uff0c\u5e74\u9f84\u5927\u4e8e 18 \u5c81\u7684\u7528\u6237\uff1a<\/p>\n<pre>$users = DB::table('users')\n            -&amp;gt;where('name', 'like', 'j%')\n            -&amp;gt;where('age', '&amp;gt;', 18)\n            -&amp;gt;get();<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<ol>\n<li>\u907f\u514d N+1 \u67e5\u8be2\u95ee\u9898<\/li>\n<\/ol>\n<p>\u5728 Laravel \u4e2d\uff0cN+1 \u67e5\u8be2\u95ee\u9898\u6307\u7684\u662f\u5728\u67e5\u8be2\u4e00\u4e2a\u8868\u7684\u540c\u65f6\uff0c\u5bf9\u5173\u8054\u8868\u7684\u6570\u636e\u8fdb\u884c\u4e86 N \u6b21\u5355\u72ec\u67e5\u8be2\u3002\u8fd9\u79cd\u67e5\u8be2\u65b9\u5f0f\u4f1a\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u5e94\u8be5\u5c3d\u53ef\u80fd\u907f\u514d\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u67e5\u8be2\u6240\u6709\u6587\u7ae0\u53ca\u5176\u4f5c\u8005\uff1a<\/p>\n<pre>$posts = AppPost::all();\n\nforeach ($posts as $post) {\n    echo $post-&amp;gt;title;\n    echo $post-&amp;gt;author-&amp;gt;name;\n}<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u4ee5\u4e0a\u4ee3\u7801\u4f1a\u9488\u5bf9\u6bcf\u4e2a\u6587\u7ae0\u90fd\u6267\u884c\u4e00\u6b21\u67e5\u8be2\uff0c\u4ee5\u83b7\u53d6\u4f5c\u8005\u7684\u540d\u79f0\u3002\u8981\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u53ef\u4ee5\u4f7f\u7528 with() \u65b9\u6cd5\u4e00\u6b21\u6027\u52a0\u8f7d\u6240\u6709\u76f8\u5173\u6570\u636e\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>$posts = AppPost::with('author')-&amp;gt;get();\n\nforeach ($posts as $post) {\n    echo $post-&amp;gt;title;\n    echo $post-&amp;gt;author-&amp;gt;name;\n}<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u8fd9\u6837\u5c31\u53ea\u9700\u8981\u6267\u884c\u4e24\u4e2a\u67e5\u8be2\u3002\u8bf7\u6ce8\u610f\uff0cwith() \u65b9\u6cd5\u53ef\u4ee5\u63a5\u53d7\u591a\u4e2a\u53c2\u6570\u3002<\/p>\n<ol>\n<li>\u4f7f\u7528\u7d22\u5f15<\/li>\n<\/ol>\n<p>\u6570\u636e\u5e93\u4e2d\u7684\u7d22\u5f15\u53ef\u4ee5\u663e\u7740\u63d0\u9ad8\u67e5\u8be2\u901f\u5ea6\uff0c\u5e94\u8be5\u5c3d\u53ef\u80fd\u5730\u4f7f\u7528\u3002\u5728 Laravel \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u8fc1\u79fb\u6587\u4ef6\u6dfb\u52a0\u7d22\u5f15\u3002\u4ee5\u4e0b\u793a\u4f8b\u4e3a users \u8868\u6dfb\u52a0\u540d\u4e3a\u201cemail_index\u201d\u7684\u7d22\u5f15\uff1a<\/p>\n<pre>Schema::table('users', function (Blueprint $table) {\n    $table-&amp;gt;index('email', 'email_index');\n});<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u5728\u67e5\u8be2\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528 Laravel \u7684\u67e5\u8be2\u6784\u5efa\u5668\u6765\u6307\u5b9a\u8981\u4f7f\u7528\u7684\u7d22\u5f15\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u5c06\u9488\u5bf9 email_index \u7d22\u5f15\u6267\u884c\u67e5\u8be2\uff1a<\/p>\n<pre>$users = DB::table('users')-&amp;gt;where('email', '=', $email)-&amp;gt;useIndex('email_index')-&amp;gt;get();<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<ol>\n<li>\u7f13\u5b58\u67e5\u8be2\u7ed3\u679c<\/li>\n<\/ol>\n<p>\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0cLaravel \u4e2d\u7684\u67e5\u8be2\u8bed\u53e5\u53ef\u80fd\u5f88\u590d\u6742\u6216\u8005\u5f88\u8017\u65f6\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5e94\u8be5\u8003\u8651\u7f13\u5b58\u67e5\u8be2\u7ed3\u679c\uff0c\u4ee5\u907f\u514d\u91cd\u590d\u67e5\u8be2\u3002 Laravel \u63d0\u4f9b\u4e86\u591a\u79cd\u7f13\u5b58\u9a71\u52a8\u7a0b\u5e8f\uff0c\u5305\u62ec\u6587\u4ef6\u3001\u6570\u636e\u5e93\u548c Memcached\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u6570\u636e\u5e93\u7f13\u5b58\u7684\u793a\u4f8b\uff1a<\/p>\n<pre>$users = Cache::remember('users', $minutes, function () {\n    return DB::table('users')-&amp;gt;get();\n});<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u4ee5\u4e0a\u4ee3\u7801\u5c06\u5728\u7f13\u5b58\u4e2d\u5b58\u50a8\u7528\u6237\u6570\u636e\uff0c\u5e76\u5728\u7f13\u5b58\u8fc7\u671f\u524d\u8fd4\u56de\u8be5\u6570\u636e\u3002\u5728\u4e0b\u4e00\u4e2a\u8bf7\u6c42\u4e2d\uff0c\u5c06\u4f1a\u91cd\u65b0\u6267\u884c\u67e5\u8be2\u5e76\u5b58\u50a8\u65b0\u7684\u7ed3\u679c\u3002<\/p>\n<ol>\n<li>\u4f7f\u7528\u539f\u751f\u67e5\u8be2<\/li>\n<\/ol>\n<p>\u867d\u7136\u907f\u514d\u4f7f\u7528\u539f\u751f SQL \u67e5\u8be2\u662f\u4e00\u4e2a\u597d\u7684\u5b9e\u8df5\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u539f\u751f\u67e5\u8be2\u4ecd\u7136\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002\u5373\u4f7f\u5728\u4f7f\u7528\u539f\u751f SQL \u67e5\u8be2\u65f6\uff0c\u4e5f\u53ef\u4ee5\u5229\u7528 Laravel \u7684\u67e5\u8be2\u6784\u5efa\u5668\u6784\u5efa\u67e5\u8be2\u8bed\u53e5\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u539f\u751f SQL \u67e5\u8be2\u7684\u793a\u4f8b\uff1a<\/p>\n<pre>$users = DB::select('SELECT * FROM users WHERE name = ?', ['John']);<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u5728\u4f7f\u7528\u539f\u751f SQL \u67e5\u8be2\u65f6\uff0c\u5e94\u8be5\u8c28\u614e\u5904\u7406\u8f93\u5165\u53c2\u6570\uff0c\u4ee5\u907f\u514d SQL \u6ce8\u5165\u653b\u51fb\u3002<\/p>\n<p>\u7ed3\u8bba<\/p>\n<p>Laravel \u662f\u4e00\u4e2a\u529f\u80fd\u5f3a\u5927\u3001\u6613\u4e8e\u7ef4\u62a4\u7684 PHP \u6846\u67b6\uff0c\u5728\u5904\u7406\u5927\u91cf\u6570\u636e\u65f6\u53ef\u80fd\u4f1a\u9047\u5230\u6027\u80fd\u95ee\u9898\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u4ecb\u7ecd\u4e86\u4e00\u4e9b\u4f18\u5316 Laravel \u67e5\u8be2\u8bed\u53e5\u7684\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528 Eloquent \u6a21\u578b\u3001\u907f\u514d N+1 \u67e5\u8be2\u3001\u4f7f\u7528\u7d22\u5f15\u3001\u7f13\u5b58\u67e5\u8be2\u7ed3\u679c\u548c\u4f7f\u7528\u539f\u751f\u67e5\u8be2\u7b49\u3002\u901a\u8fc7\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u63d0\u5347\u5e94\u7528\u7684\u6027\u80fd\uff0c\u5e76\u63d0\u4f9b\u66f4\u597d\u7684\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662flaravel\u4f18\u5316\u67e5\u8be2\u8bed\u53e5\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>laravel \u662f\u4e00\u6b3e\u529f\u80fd\u5f3a\u5927\u3001\u6613\u4e8e\u7ef4\u62a4\u7684 php \u6846\u67b6\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e web \u5f00\u53d1\u3002\u7136\u800c\uff0c\u968f\u7740\u6570\u636e\u7684\u589e\u957f\uff0c\u67e5\u8be2\u8bed\u53e5\u7684\u6027\u80fd\u4f1a\u9010\u6e10\u53d8\u5f97\u7f13\u6162\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5f71\u54cd\u5e94\u7528\u7684\u54cd\u5e94\u65f6\u95f4\u548c\u7528\u6237\u4f53\u9a8c\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f18\u5316 laravel \u4e2d\u7684\u67e5\u8be2\u8bed\u53e5\uff0c\u4ee5\u63d0\u5347\u5e94\u7528\u7684\u6027\u80fd\u3002 \u4f7f\u7528\u5408\u9002\u7684 Eloquent \u67e5\u8be2\u65b9\u6cd5 Laravel \u63d0\u4f9b\u4e86\u4e00\u5957\u5f3a\u5927\u7684 ORM\uff08\u5bf9\u8c61\u5173\u7cfb\u6620\u5c04\uff09\u6846\u67b6\uff0c\u5373 Eloquent\u3002Eloquent \u67e5\u8be2\u65b9\u6cd5\u901a\u5e38\u6bd4\u624b\u52a8\u7f16\u5199\u67e5\u8be2\u8bed\u53e5\u66f4\u7b80\u6d01\uff0c\u800c\u4e14\u53ef\u4ee5\u8f7b\u677e\u5904\u7406\u590d\u6742\u7684\u5173\u7cfb\u67e5\u8be2\u3002Laravel \u4e2d\u7684 Eloquent \u67e5\u8be2\u65b9\u6cd5\u4e5f\u56e0\u6b64\u6210\u4e3a\u6700\u53d7\u6b22\u8fce\u7684\u6570\u636e\u8bbf\u95ee\u65b9\u5f0f\u4e4b\u4e00\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684 Eloquent \u67e5\u8be2\u65b9\u6cd5\uff1a all()\uff1a\u8fd4\u56de\u6240\u6709\u7b26\u5408\u6761\u4ef6\u7684\u8bb0\u5f55\u3002 find()\uff1a\u8fd4\u56de\u5355\u4e2a\u8bb0\u5f55\uff0c\u6839\u636e\u4e3b\u952e\u67e5\u627e\u3002 where()\uff1a\u7528\u4e8e\u8bbe\u7f6e\u67e5\u8be2\u6761\u4ef6\u3002 orderBy()\uff1a\u6839\u636e\u6307\u5b9a\u5b57\u6bb5\u6392\u5e8f\u3002 select()\uff1a\u6307\u5b9a\u67e5\u8be2\u8981\u8fd4\u56de\u7684\u5217\u3002 join()\uff1a\u7528\u4e8e\u8fde\u63a5\u8868\u3002 groupBy()\uff1a\u6839\u636e\u5b57\u6bb5\u5206\u7ec4\u3002 count()\uff1a\u8fd4\u56de\u7b26\u5408\u6761\u4ef6\u7684\u8bb0\u5f55\u6570\u3002 \u5176\u4e2d\uff0c\u4f7f\u7528 where() \u65b9\u6cd5\u8bbe\u7f6e\u67e5\u8be2\u6761\u4ef6\u975e\u5e38\u91cd\u8981\u3002\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8bbe\u7f6e\u591a\u4e2a\u6761\u4ef6\uff0c\u5e76\u4f7f\u7528\u4e00\u7cfb\u5217\u7684\u903b\u8f91\u8fd0\u7b97\u7b26\u8054\u5408\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u67e5\u8be2\u6240\u6709\u540d\u79f0\u4ee5\u201cj\u201d\u5f00\u5934\uff0c\u5e74\u9f84\u5927\u4e8e 18 \u5c81\u7684\u7528\u6237\uff1a $users = DB::table(&#8216;users&#8217;) -&amp;gt;where(&#8216;name&#8217;, &#8216;like&#8217;, &#8216;j%&#8217;) -&amp;gt;where(&#8216;age&#8217;, &#8216;&amp;gt;&#8217;, 18) -&amp;gt;get(); \u767b\u5f55\u540e\u590d\u5236 \u907f\u514d N+1 \u67e5\u8be2\u95ee\u9898 \u5728 Laravel \u4e2d\uff0cN+1 \u67e5\u8be2\u95ee\u9898\u6307\u7684\u662f\u5728\u67e5\u8be2\u4e00\u4e2a\u8868\u7684\u540c\u65f6\uff0c\u5bf9\u5173\u8054\u8868\u7684\u6570\u636e\u8fdb\u884c\u4e86 N \u6b21\u5355\u72ec\u67e5\u8be2\u3002\u8fd9\u79cd\u67e5\u8be2\u65b9\u5f0f\u4f1a\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u5e94\u8be5\u5c3d\u53ef\u80fd\u907f\u514d\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u67e5\u8be2\u6240\u6709\u6587\u7ae0\u53ca\u5176\u4f5c\u8005\uff1a $posts 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