{"id":23025,"date":"2024-11-21T08:20:52","date_gmt":"2024-11-21T00:20:52","guid":{"rendered":"https:\/\/fwq.ai\/blog\/23025\/"},"modified":"2024-11-21T08:20:52","modified_gmt":"2024-11-21T00:20:52","slug":"laravel-%e6%9f%a5%e8%af%a2%e6%9c%80%e5%a4%a7%e7%9a%84","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/23025\/","title":{"rendered":"laravel \u67e5\u8be2\u6700\u5927\u7684"},"content":{"rendered":"

laravel\u67e5\u8be2\u6700\u5927\u7684\u6570\u636e<\/p>\n

Laravel\u662f\u4e00\u4e2a\u4e3aweb\u827a\u672f\u5bb6\u8bbe\u8ba1\u7684PHP Web\u6846\u67b6\uff0c\u5b83\u4e0d\u4ec5\u6709\u8bb8\u591a\u4f18\u79c0\u7684\u529f\u80fd\uff0c\u800c\u4e14\u5b83\u7684\u8bed\u8a00\u7b26\u5408\u827a\u672f\u5bb6\u4eec\u7684\u601d\u7ef4\u65b9\u5f0f\u3002\u5728Laravel\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Eloquent ORM\u6765\u6620\u5c04\u6570\u636e\u5e93\u3002Eloquent\u662f\u4e00\u79cd\u4f18\u96c5\u7684\u3001\u6d41\u7545\u7684\u3001\u7528\u4e8e\u5728Laravel\u4e2d\u5b9a\u4e49\u548c\u6267\u884c\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u8bed\u8a00\u3002<\/p>\n

\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u4ecb\u7ecd\u5982\u4f55\u5728Laravel\u4e2d\u67e5\u8be2\u6700\u5927\u7684\u6570\u636e\u3002\u5728\u672c\u4f8b\u4e2d\uff0c\u6211\u4eec\u5c06\u4f7f\u7528\u4e00\u4e2aproducts\u8868\u3002\u8fd9\u4e2a\u8868\u6709\u4e00\u4e2a\u540d\u4e3a\u201cprice\u201d\u7684\u5217\uff0c\u6211\u4eec\u5c06\u5728\u8fd9\u5217\u4e2d\u67e5\u627e\u6700\u5927\u7684\u4ef7\u683c\u3002<\/p>\n

\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u786e\u5b9a\u54ea\u4e2a\u7248\u672c\u7684Laravel\u6846\u67b6\u6211\u4eec\u5c06\u4f7f\u7528\u3002\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u5c06\u4f7f\u7528Laravel 8\u3002\u5728Laravel 8\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u65b9\u5f0f\u67e5\u8be2\u6700\u5927\u503c\uff1a\u4f7f\u7528\u539f\u59cb\u67e5\u8be2\u6216\u4f7f\u7528Eloquent ORM\u3002<\/p>\n

\u4f7f\u7528\u539f\u59cb\u67e5\u8be2<\/p>\n

\u4f7f\u7528\u539f\u59cb\u67e5\u8be2\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u6765\u67e5\u8be2\u6700\u5927\u503c\uff1a<\/p>\n

$maxPrice = DB::table('products')-&gt;max('price');<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528DB\u95e8\u9762\u6765\u8bbf\u95ee\u6570\u636e\u5e93\u3002\u7136\u540e\uff0c\u4f7f\u7528table()\u65b9\u6cd5\u6307\u5b9a\u6211\u4eec\u8981\u67e5\u8be2\u7684\u8868\u683c\u3002\u6700\u540e\uff0c\u6211\u4eec\u8c03\u7528max()\u65b9\u6cd5\u6765\u83b7\u53d6\u5217\u7684\u6700\u5927\u503c\u3002<\/p>\n
\u6211\u4eec\u8fd8\u53ef\u4ee5\u5728\u67e5\u8be2\u4e2d\u4f7f\u7528where()\u65b9\u6cd5\u6765\u6dfb\u52a0\u7b5b\u9009\u6761\u4ef6\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u67e5\u8be2\u4ef7\u683c\u5927\u4e8e100\u7684\u5546\u54c1\u7684\u6700\u9ad8\u4ef7\u683c\uff1a<\/p>\n
$maxPrice = DB::table('products')-&gt;where('price', '&gt;', 100)-&gt;max('price');<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u53ef\u4ee5\u770b\u5230\uff0c\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u5728where()\u65b9\u6cd5\u4e2d\u6dfb\u52a0\u4e86\u4e00\u4e2a\u4e0e\u64cd\u4f5c\u7b26\u548c\u4e00\u4e2a\u503c\u6765\u6307\u5b9a\u7b5b\u9009\u6761\u4ef6\u3002<\/p>\n
\u4f7f\u7528Eloquent ORM<\/p>\n
\u5982\u679c\u60a8\u60f3\u901a\u8fc7Eloquent ORM\u67e5\u8be2\u6700\u5927\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
$maxPrice = Product::max('price');<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528Product\u6a21\u578b\u6765\u64cd\u4f5cproducts\u8868\u3002\u7136\u540e\uff0c\u6211\u4eec\u8c03\u7528max()\u65b9\u6cd5\u6765\u83b7\u53d6\u5217\u7684\u6700\u5927\u503c\u3002<\/p>\n
\u4e0e\u539f\u59cb\u67e5\u8be2\u7c7b\u4f3c\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528where()\u65b9\u6cd5\u6765\u6dfb\u52a0\u7b5b\u9009\u6761\u4ef6\uff1a<\/p>\n
$maxPrice = Product::where('price', '&gt;', 100)-&gt;max('price');<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86where()\u65b9\u6cd5\u6dfb\u52a0\u4e86\u4e00\u4e2a\u4e0e\u64cd\u4f5c\u7b26\u548c\u4e00\u4e2a\u503c\u6765\u6307\u5b9a\u7b5b\u9009\u6761\u4ef6\u3002<\/p>\n
\u603b\u7ed3<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u5728Laravel\u4e2d\u67e5\u8be2\u6700\u5927\u503c\u7684\u4e24\u79cd\u4e0d\u540c\u65b9\u6cd5\u3002\u5982\u679c\u60a8\u559c\u6b22\u66f4\u591a\u539f\u59cb\u7684\u64cd\u4f5c\u548c\u66f4\u597d\u7684\u6027\u80fd\uff0c\u90a3\u4e48\u4f7f\u7528\u539f\u59cb\u67e5\u8be2\u53ef\u80fd\u662f\u4e00\u4e2a\u4e0d\u9519\u7684\u9009\u62e9\u3002\u4f46\u662f\uff0c\u5982\u679c\u60a8\u66f4\u559c\u6b22\u4f7f\u7528\u6a21\u578b\u548c\u66f4\u81ea\u7136\u7684\u8bed\u6cd5\uff0c\u90a3\u4e48\u4f7f\u7528Eloquent ORM\u53ef\u80fd\u66f4\u9002\u5408\u60a8\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u60a8\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u9700\u6c42\u548c\u4f7f\u7528\u4e60\u60ef\u6765\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662flaravel \u67e5\u8be2\u6700\u5927\u7684\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":"
laravel\u67e5\u8be2\u6700\u5927\u7684\u6570\u636e Laravel\u662f\u4e00\u4e2a\u4e3aweb\u827a\u672f\u5bb6\u8bbe\u8ba1\u7684PHP Web\u6846\u67b6\uff0c\u5b83\u4e0d\u4ec5\u6709\u8bb8\u591a\u4f18\u79c0\u7684\u529f\u80fd\uff0c\u800c\u4e14\u5b83\u7684\u8bed\u8a00\u7b26\u5408\u827a\u672f\u5bb6\u4eec\u7684\u601d\u7ef4\u65b9\u5f0f\u3002\u5728Laravel\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Eloquent ORM\u6765\u6620\u5c04\u6570\u636e\u5e93\u3002Eloquent\u662f\u4e00\u79cd\u4f18\u96c5\u7684\u3001\u6d41\u7545\u7684\u3001\u7528\u4e8e\u5728Laravel\u4e2d\u5b9a\u4e49\u548c\u6267\u884c\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u8bed\u8a00\u3002 \u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u4ecb\u7ecd\u5982\u4f55\u5728Laravel\u4e2d\u67e5\u8be2\u6700\u5927\u7684\u6570\u636e\u3002\u5728\u672c\u4f8b\u4e2d\uff0c\u6211\u4eec\u5c06\u4f7f\u7528\u4e00\u4e2aproducts\u8868\u3002\u8fd9\u4e2a\u8868\u6709\u4e00\u4e2a\u540d\u4e3a\u201cprice\u201d\u7684\u5217\uff0c\u6211\u4eec\u5c06\u5728\u8fd9\u5217\u4e2d\u67e5\u627e\u6700\u5927\u7684\u4ef7\u683c\u3002 \u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u786e\u5b9a\u54ea\u4e2a\u7248\u672c\u7684Laravel\u6846\u67b6\u6211\u4eec\u5c06\u4f7f\u7528\u3002\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u5c06\u4f7f\u7528Laravel 8\u3002\u5728Laravel 8\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u65b9\u5f0f\u67e5\u8be2\u6700\u5927\u503c\uff1a\u4f7f\u7528\u539f\u59cb\u67e5\u8be2\u6216\u4f7f\u7528Eloquent ORM\u3002 \u4f7f\u7528\u539f\u59cb\u67e5\u8be2 \u4f7f\u7528\u539f\u59cb\u67e5\u8be2\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u6765\u67e5\u8be2\u6700\u5927\u503c\uff1a $maxPrice = DB::table(‘products’)-&gt;max(‘price’); \u767b\u5f55\u540e\u590d\u5236 \u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528DB\u95e8\u9762\u6765\u8bbf\u95ee\u6570\u636e\u5e93\u3002\u7136\u540e\uff0c\u4f7f\u7528table()\u65b9\u6cd5\u6307\u5b9a\u6211\u4eec\u8981\u67e5\u8be2\u7684\u8868\u683c\u3002\u6700\u540e\uff0c\u6211\u4eec\u8c03\u7528max()\u65b9\u6cd5\u6765\u83b7\u53d6\u5217\u7684\u6700\u5927\u503c\u3002 \u6211\u4eec\u8fd8\u53ef\u4ee5\u5728\u67e5\u8be2\u4e2d\u4f7f\u7528where()\u65b9\u6cd5\u6765\u6dfb\u52a0\u7b5b\u9009\u6761\u4ef6\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u67e5\u8be2\u4ef7\u683c\u5927\u4e8e100\u7684\u5546\u54c1\u7684\u6700\u9ad8\u4ef7\u683c\uff1a $maxPrice = DB::table(‘products’)-&gt;where(‘price’, ‘&gt;’, 100)-&gt;max(‘price’); \u767b\u5f55\u540e\u590d\u5236 \u53ef\u4ee5\u770b\u5230\uff0c\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u5728where()\u65b9\u6cd5\u4e2d\u6dfb\u52a0\u4e86\u4e00\u4e2a\u4e0e\u64cd\u4f5c\u7b26\u548c\u4e00\u4e2a\u503c\u6765\u6307\u5b9a\u7b5b\u9009\u6761\u4ef6\u3002 \u4f7f\u7528Eloquent ORM \u5982\u679c\u60a8\u60f3\u901a\u8fc7Eloquent ORM\u67e5\u8be2\u6700\u5927\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a $maxPrice = Product::max(‘price’); \u767b\u5f55\u540e\u590d\u5236 \u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528Product\u6a21\u578b\u6765\u64cd\u4f5cproducts\u8868\u3002\u7136\u540e\uff0c\u6211\u4eec\u8c03\u7528max()\u65b9\u6cd5\u6765\u83b7\u53d6\u5217\u7684\u6700\u5927\u503c\u3002 \u4e0e\u539f\u59cb\u67e5\u8be2\u7c7b\u4f3c\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528where()\u65b9\u6cd5\u6765\u6dfb\u52a0\u7b5b\u9009\u6761\u4ef6\uff1a $maxPrice = Product::where(‘price’, ‘&gt;’, 100)-&gt;max(‘price’); \u767b\u5f55\u540e\u590d\u5236 \u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86where()\u65b9\u6cd5\u6dfb\u52a0\u4e86\u4e00\u4e2a\u4e0e\u64cd\u4f5c\u7b26\u548c\u4e00\u4e2a\u503c\u6765\u6307\u5b9a\u7b5b\u9009\u6761\u4ef6\u3002 \u603b\u7ed3 \u4ee5\u4e0a\u5c31\u662f\u5728Laravel\u4e2d\u67e5\u8be2\u6700\u5927\u503c\u7684\u4e24\u79cd\u4e0d\u540c\u65b9\u6cd5\u3002\u5982\u679c\u60a8\u559c\u6b22\u66f4\u591a\u539f\u59cb\u7684\u64cd\u4f5c\u548c\u66f4\u597d\u7684\u6027\u80fd\uff0c\u90a3\u4e48\u4f7f\u7528\u539f\u59cb\u67e5\u8be2\u53ef\u80fd\u662f\u4e00\u4e2a\u4e0d\u9519\u7684\u9009\u62e9\u3002\u4f46\u662f\uff0c\u5982\u679c\u60a8\u66f4\u559c\u6b22\u4f7f\u7528\u6a21\u578b\u548c\u66f4\u81ea\u7136\u7684\u8bed\u6cd5\uff0c\u90a3\u4e48\u4f7f\u7528Eloquent ORM\u53ef\u80fd\u66f4\u9002\u5408\u60a8\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u60a8\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u9700\u6c42\u548c\u4f7f\u7528\u4e60\u60ef\u6765\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u3002 \u4ee5\u4e0a\u5c31\u662flaravel \u67e5\u8be2\u6700\u5927\u7684\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-23025","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/23025","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=23025"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/23025\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=23025"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=23025"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=23025"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}