{"id":47971,"date":"2023-01-12T02:20:49","date_gmt":"2023-06-06T12:17:05","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e9%81%87%e5%88%b0%e4%ba%86express-graphql%e5%87%ba%e7%8e%b0%e7%9a%84%e9%94%99%e8%af%af%e3%80%82i-encountered-an-error-with-express-graphql\/"},"modified":"2024-01-15T12:28:21","modified_gmt":"2024-01-15T04:28:21","slug":"%e6%88%91%e9%81%87%e5%88%b0%e4%ba%86express-graphql%e5%87%ba%e7%8e%b0%e7%9a%84%e9%94%99%e8%af%af%e3%80%82i-encountered-an-error-with-express-graphql","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e9%81%87%e5%88%b0%e4%ba%86express-graphql%e5%87%ba%e7%8e%b0%e7%9a%84%e9%94%99%e8%af%af%e3%80%82i-encountered-an-error-with-express-graphql\/","title":{"rendered":"\u6211\u9047\u5230\u4e86express-graphql\u51fa\u73b0\u7684\u9519\u8bef\u3002(I encountered an error with express-graphql.)"},"content":{"rendered":"

\u4f60\u8bd5\u56fe\u505a\u4ec0\u4e48\uff1f<\/h1>\n

\u6211\u6253\u7b97\u642d\u5efaGraphQL + Express JS + MongoDB\u7684\u73af\u5883\u3002
\n\u4f46\u662f\u5728\u542f\u52a8\u670d\u52a1\u5668\u65f6\u9047\u5230\u4e86\u95ee\u9898\u3002<\/p>\n

\u8fd9\u4e2a\u95ee\u9898<\/h1>\n

\u4f7f\u7528mongoose\u8fde\u63a5\u5230MongoDB\u3002
\n\u5728app.use\u7684\u5904\u7406\u7a0b\u5e8f\u90e8\u5206\u6307\u5b9agraphqlHTTP\u3002
\n\u8868\u9762\u4e0a\u770b\u8d77\u6765\u6ca1\u95ee\u9898\u3002<\/p>\n

\/\/app.js<\/span>\r\n\r\nconst<\/span> express<\/span> =<\/span> require<\/span>(<\/span>'<\/span>express<\/span>'<\/span>)<\/span>\r\nconst<\/span> graphqlHTTP<\/span> =<\/span> require<\/span>(<\/span>'<\/span>express-graphql<\/span>'<\/span>)<\/span>\r\nconst<\/span> mongoose<\/span> =<\/span> require<\/span>(<\/span>'<\/span>mongoose<\/span>'<\/span>)<\/span>\r\nconst<\/span> app<\/span> =<\/span> express<\/span>()<\/span>\r\n\r\nmongoose<\/span>.<\/span>connect<\/span>(<\/span>'<\/span>mongodb+srv:\/\/testuser001:password@cluster0.fpkid.mongodb.net\/my_db?retryWrites=true&w=majority<\/span>'<\/span>)<\/span>\r\nmongoose<\/span>.<\/span>connection<\/span>.<\/span>once<\/span>(<\/span>'<\/span>open<\/span>'<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n  console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>db connected<\/span>'<\/span>)<\/span>\r\n})<\/span>\r\n\r\napp<\/span>.<\/span>use<\/span>(<\/span>'<\/span>\/graphql<\/span>'<\/span>,<\/span> graphqlHTTP<\/span>({<\/span>\r\n\r\n}));<\/span>\r\napp<\/span>.<\/span>listen<\/span>(<\/span>4000<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n  console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>listening 4000<\/span>'<\/span>)<\/span>\r\n})<\/span>\r\n<\/code><\/pre>\n
\u4f46\u662f\uff0c\u5f53\u4f7f\u7528nodemon app\u6765\u542f\u52a8\u670d\u52a1\u5668\u65f6\uff0c\u5728graphqlHTTP\u7684\u5730\u65b9\u51fa\u73b0\u4e86\u9519\u8bef\u3002<\/p>\n
$ nodemon app\r\n[nodemon] 2.0.4\r\n[nodemon] to restart at any time, enter `rs`\r\n[nodemon] watching path(s): *.*\r\n[nodemon] watching extensions: js,mjs,json\r\n[nodemon] starting `node app.js`\r\ngraphql_dir\/server\/app.js:14\r\napp.use('graphql', graphqlHTTP({\r\n                   ^\r\n\r\nTypeError: graphqlHTTP is not a function\r\n    at Object.<anonymous> (\/graphql_dir\/server\/app.js:14:20)\r\n<\/code><\/pre>\n
\u5b8c\u5168\u641e\u4e0d\u61c2\u54ea\u91cc\u4e0d\u5bf9\uff0c\u82b1\u4e86\u5927\u7ea630\u5206\u949f\u8fd8\u662f\u6ca1\u6709\u5934\u7eea\u3002<\/p>\n
\u89e3\u51b3\u95ee\u9898<\/h1>\n
\u8fd9\u91cc\u8be6\u7ec6\u5730\u5199\u4e86\u4f7f\u7528\u65b9\u5f0f\u3002<\/p>\n
\/\/ \u6b63\u89e3<\/span>\r\nconst<\/span> {<\/span> graphqlHTTP<\/span> }<\/span>  =<\/span> require<\/span>(<\/span>'<\/span>express-graphql<\/span>'<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u5c31\u662f\u8bf4\u4e0b\u9762\u5217\u4e3e\u7684\u662f\u540c\u4e49\u8bcd\u5bf9\u5427\u3002<\/p>\n
\r\nconst<\/span> graphqlHTTP<\/span> =<\/span> require<\/span>(<\/span>'<\/span>express-graphql<\/span>'<\/span>).<\/span>graphqlHTTP<\/span>\r\n<\/code><\/pre>\n
\u4f3c\u4e4e\u662f\u76f4\u63a5\u5c06\u6587\u4ef6\u4e2d\u7684\u5185\u5bb9\u4f20\u9012\u7ed9\u4e86graphqlHTTP\u3002<\/p>\n
\u8fdb\u884c\u4fee\u6b63\uff0c\u7136\u540e\u4f7f\u7528nodemon app\u518d\u6b21\u542f\u52a8\u670d\u52a1\u5668\u3002
\n\u6210\u529f\u5730\u8fde\u63a5\u5230\u4e86mongoDB\uff01<\/p>\n
$ nodemon app\r\n[nodemon] 2.0.4\r\n[nodemon] to restart at any time, enter `rs`\r\n[nodemon] watching path(s): *.*\r\n[nodemon] watching extensions: js,mjs,json\r\n[nodemon] starting `node app.js`\r\n(node:13225) DeprecationWarning: current URL string parser is deprecated, and will be removed in a future version. To use the new parser, pass option { useNewUrlParser: true } to MongoClient.connect.\r\n(Use `node --trace-deprecation ...` to show where the warning was created)\r\nlistening 4000\r\n(node:13225) DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.\r\ndb connected\r\n<\/code><\/pre>\n
\u8ffd\u52a0\u7559\u8a00<\/h1>\n
\u7136\u800c\uff0c\u6211\u5728\u4e00\u4e9b\u6587\u7ae0\u4e2d\u770b\u5230\u4e86\u50cf require(‘express-graphql’) \u8fd9\u6837\u7684\u4ee3\u7801\u3002\u6211\u4e0d\u77e5\u9053\u5b83\u662f\u5426\u6709\u9519\u8bef\u6216\u662f\u5426\u80fd\u6210\u529f\u8fd0\u884c\uff0c\u4f46\u5982\u679c\u9047\u5230\u9519\u8bef\uff0c\u53ef\u4ee5\u53c2\u8003\u4e00\u4e0b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4f60\u8bd5\u56fe\u505a\u4ec0\u4e48\uff1f \u6211\u6253\u7b97\u642d\u5efaGraphQL + Express JS + MongoDB\u7684\u73af\u5883\u3002 \u4f46\u662f\u5728\u542f\u52a8\u670d\u52a1 […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-47971","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u6211\u9047\u5230\u4e86express-graphql\u51fa\u73b0\u7684\u9519\u8bef\u3002(I encountered an error with express-graphql.) - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u6211\u9047\u5230\u4e86express-graphql\u51fa\u73b0\u7684\u9519\u8bef\u3002i-encountered-an-error-with-express-graphql\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u6211\u9047\u5230\u4e86express-graphql\u51fa\u73b0\u7684\u9519\u8bef\u3002(I encountered an error with express-graphql.)\" \/>\n<meta property=\"og:description\" content=\"\u4f60\u8bd5\u56fe\u505a\u4ec0\u4e48\uff1f \u6211\u6253\u7b97\u642d\u5efaGraphQL + Express JS + MongoDB\u7684\u73af\u5883\u3002 \u4f46\u662f\u5728\u542f\u52a8\u670d\u52a1 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u6211\u9047\u5230\u4e86express-graphql\u51fa\u73b0\u7684\u9519\u8bef\u3002i-encountered-an-error-with-express-graphql\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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