{"id":31936,"date":"2023-01-02T13:37:26","date_gmt":"2024-03-05T07:41:11","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8node-js%e4%b8%ad%e4%bd%bf%e7%94%a8pg%e6%a8%a1%e5%9d%97%e7%bc%96%e5%86%99catch%e7%9a%84%e6%96%b9%e6%b3%95\/"},"modified":"2024-04-29T08:09:14","modified_gmt":"2024-04-29T00:09:14","slug":"%e5%9c%a8node-js%e4%b8%ad%e4%bd%bf%e7%94%a8pg%e6%a8%a1%e5%9d%97%e7%bc%96%e5%86%99catch%e7%9a%84%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8node-js%e4%b8%ad%e4%bd%bf%e7%94%a8pg%e6%a8%a1%e5%9d%97%e7%bc%96%e5%86%99catch%e7%9a%84%e6%96%b9%e6%b3%95\/","title":{"rendered":"\u5728Node.js\u4e2d\u4f7f\u7528pg\u6a21\u5757\u7f16\u5199catch\u7684\u65b9\u6cd5"},"content":{"rendered":"<p>\u8fd9\u662f\u6700\u597d\u7684\u3002\u4ee5\u4e0b\u662f\u6355\u83b7\u5f02\u5e38\u5e76\u5c06\u5f02\u5e38toString\u5230\u6d88\u606f\u7684\u4f8b\u5916\u3002<\/p>\n<p>\u5f88\u597d\u7684\u4f8b\u5b50\u3002\u5728catch\u5757\u4e2d\uff0c\u7528Promise.reject\u5c06new Error\u5305\u56f4\u8d77\u6765\u5e76\u8fd4\u56de\u3002\u8fd9\u79cd\u5199\u6cd5\u53ef\u4ee5\u77e5\u9053\u5728\u54ea\u91cc\u51fa\u73b0\u4e86\u5f02\u5e38\u9519\u8bef\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">await<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">dbClient<\/span><span class=\"p\">.<\/span><span class=\"nx\">query<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">example;<\/span><span class=\"dl\">\"<\/span><span class=\"p\">).<\/span><span class=\"k\">catch<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nb\">Promise<\/span><span class=\"p\">.<\/span><span class=\"nx\">reject<\/span><span class=\"p\">(<\/span><span class=\"k\">new<\/span> <span class=\"nb\">Error<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">))<\/span> <span class=\"p\">);<\/span>\r\n <span class=\"nl\">Error<\/span><span class=\"p\">:<\/span> <span class=\"nl\">error<\/span><span class=\"p\">:<\/span> <span class=\"nx\">syntax<\/span> <span class=\"nx\">error<\/span> <span class=\"nx\">at<\/span> <span class=\"nx\">or<\/span> <span class=\"nx\">near<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">;<\/span><span class=\"dl\">\"<\/span>\r\n    <span class=\"nx\">at<\/span> <span class=\"nx\">dbClient<\/span><span class=\"p\">.<\/span><span class=\"nx\">query<\/span><span class=\"p\">.<\/span><span class=\"k\">catch<\/span><span class=\"p\">.<\/span><span class=\"nx\">e<\/span> <span class=\"p\">(<\/span><span class=\"nx\">\u81ea\u5206\u306e\u30b3\u30fc\u30c9<\/span><span class=\"p\">.<\/span><span class=\"nx\">js<\/span><span class=\"p\">:<\/span><span class=\"mi\">44<\/span><span class=\"p\">:<\/span><span class=\"mi\">65<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"nx\">at<\/span> <span class=\"nx\">process<\/span><span class=\"p\">.<\/span><span class=\"nx\">_tickCallback<\/span> <span class=\"p\">(<\/span><span class=\"nx\">internal<\/span><span class=\"o\">\/<\/span><span class=\"nx\">process<\/span><span class=\"o\">\/<\/span><span class=\"nx\">next_tick<\/span><span class=\"p\">.<\/span><span class=\"nx\">js<\/span><span class=\"p\">:<\/span><span class=\"mi\">68<\/span><span class=\"p\">:<\/span><span class=\"mi\">7<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u4e0d\u597d\u7684\u793a\u4f8b1\uff1a\u901a\u8fc7\u6355\u83b7\u5f02\u5e38\u5e76\u4f7f\u7528\u65b0\u7684Error\u5b9e\u4f8b\u8fdb\u884c\u518d\u6b21\u629b\u51fa\u3002\u8d77\u521d\u6211\u8ba4\u4e3a\u8fd9\u6837\u505a\u53ef\u4ee5\uff0c\u4f46\u662f\u629b\u51fa\u52a8\u4f5c\u4e0d\u597d\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">await<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">dbClient<\/span><span class=\"p\">.<\/span><span class=\"nx\">query<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">example;<\/span><span class=\"dl\">\"<\/span><span class=\"p\">).<\/span><span class=\"k\">catch<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span> <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nb\">Error<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">)<\/span> <span class=\"p\">});<\/span>\r\n <span class=\"nl\">Error<\/span><span class=\"p\">:<\/span> <span class=\"nl\">error<\/span><span class=\"p\">:<\/span> <span class=\"nx\">syntax<\/span> <span class=\"nx\">error<\/span> <span class=\"nx\">at<\/span> <span class=\"nx\">or<\/span> <span class=\"nx\">near<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">;<\/span><span class=\"dl\">\"<\/span>\r\n    <span class=\"nx\">at<\/span> <span class=\"nx\">dbClient<\/span><span class=\"p\">.<\/span><span class=\"nx\">query<\/span><span class=\"p\">.<\/span><span class=\"k\">catch<\/span><span class=\"p\">.<\/span><span class=\"nx\">e<\/span> <span class=\"p\">(<\/span><span class=\"nx\">\u81ea\u5206\u306e\u30b3\u30fc\u30c9<\/span><span class=\"p\">.<\/span><span class=\"nx\">js<\/span><span class=\"p\">:<\/span><span class=\"mi\">44<\/span><span class=\"p\">:<\/span><span class=\"mi\">65<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"nx\">at<\/span> <span class=\"nx\">process<\/span><span class=\"p\">.<\/span><span class=\"nx\">_tickCallback<\/span> <span class=\"p\">(<\/span><span class=\"nx\">internal<\/span><span class=\"o\">\/<\/span><span class=\"nx\">process<\/span><span class=\"o\">\/<\/span><span class=\"nx\">next_tick<\/span><span class=\"p\">.<\/span><span class=\"nx\">js<\/span><span class=\"p\">:<\/span><span class=\"mi\">68<\/span><span class=\"p\">:<\/span><span class=\"mi\">7<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u4e0d\u597d\u7684\u4f8b\u5b502\u3002\u8fd9\u672c\u6765\u5c31\u6ca1\u6709catch\u7684\u610f\u4e49\u3002\u5806\u6808\u8ddf\u8e2a\u4ecepg\u6a21\u5757\u5f00\u59cb\uff0c\u6211\u65e0\u6cd5\u77e5\u9053\u6211\u7684\u4ee3\u7801\u5728\u54ea\u91cc\u5f15\u53d1\u4e86\u5f02\u5e38\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">await<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">dbClient<\/span><span class=\"p\">.<\/span><span class=\"nx\">query<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">example;<\/span><span class=\"dl\">\"<\/span><span class=\"p\">).<\/span><span class=\"k\">catch<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span> <span class=\"k\">throw<\/span> <span class=\"nx\">e<\/span> <span class=\"p\">});<\/span>\r\n <span class=\"nl\">error<\/span><span class=\"p\">:<\/span> <span class=\"nx\">syntax<\/span> <span class=\"nx\">error<\/span> <span class=\"nx\">at<\/span> <span class=\"nx\">or<\/span> <span class=\"nx\">near<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">;<\/span><span class=\"dl\">\"<\/span>\r\n   <span class=\"nx\">at<\/span> <span class=\"nx\">Connection<\/span><span class=\"p\">.<\/span><span class=\"nx\">parseE<\/span> <span class=\"p\">(<\/span><span class=\"nx\">node_modules<\/span><span class=\"err\">\\<\/span><span class=\"nx\">pg<\/span><span class=\"err\">\\<\/span><span class=\"nx\">lib<\/span><span class=\"err\">\\<\/span><span class=\"nx\">connection<\/span><span class=\"p\">.<\/span><span class=\"nx\">js<\/span><span class=\"p\">:<\/span><span class=\"mi\">553<\/span><span class=\"p\">:<\/span><span class=\"mi\">11<\/span><span class=\"p\">)<\/span>\r\n   <span class=\"nx\">at<\/span> <span class=\"nx\">Connection<\/span><span class=\"p\">.<\/span><span class=\"nx\">parseMessage<\/span> <span class=\"p\">(<\/span><span class=\"nx\">node_modules<\/span><span class=\"err\">\\<\/span><span class=\"nx\">pg<\/span><span class=\"err\">\\<\/span><span class=\"nx\">lib<\/span><span class=\"err\">\\<\/span><span class=\"nx\">connection<\/span><span class=\"p\">.<\/span><span class=\"nx\">js<\/span><span class=\"p\">:<\/span><span class=\"mi\">378<\/span><span class=\"p\">:<\/span><span class=\"mi\">19<\/span><span class=\"p\">)<\/span>\r\n   <span class=\"nx\">at<\/span> <span class=\"nx\">Socket<\/span><span class=\"p\">.<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">anonymous<\/span><span class=\"o\">&gt;<\/span> <span class=\"p\">(<\/span><span class=\"nx\">node_modules<\/span><span class=\"err\">\\<\/span><span class=\"nx\">pg<\/span><span class=\"err\">\\<\/span><span class=\"nx\">lib<\/span><span class=\"err\">\\<\/span><span class=\"nx\">connection<\/span><span class=\"p\">.<\/span><span class=\"nx\">js<\/span><span class=\"p\">:<\/span><span class=\"mi\">119<\/span><span class=\"p\">:<\/span><span class=\"mi\">22<\/span><span class=\"p\">)<\/span>\r\n   <span class=\"nx\">at<\/span> <span class=\"nx\">Socket<\/span><span class=\"p\">.<\/span><span class=\"nx\">emit<\/span> <span class=\"p\">(<\/span><span class=\"nx\">events<\/span><span class=\"p\">.<\/span><span class=\"nx\">js<\/span><span class=\"p\">:<\/span><span class=\"mi\">182<\/span><span class=\"p\">:<\/span><span class=\"mi\">13<\/span><span class=\"p\">)<\/span>\r\n   <span class=\"nx\">at<\/span> <span class=\"nx\">addChunk<\/span> <span class=\"p\">(<\/span><span class=\"nx\">_stream_readable<\/span><span class=\"p\">.<\/span><span class=\"nx\">js<\/span><span class=\"p\">:<\/span><span class=\"mi\">283<\/span><span class=\"p\">:<\/span><span class=\"mi\">12<\/span><span class=\"p\">)<\/span>\r\n   <span class=\"nx\">at<\/span> <span class=\"nx\">readableAddChunk<\/span> <span class=\"p\">(<\/span><span class=\"nx\">_stream_readable<\/span><span class=\"p\">.<\/span><span class=\"nx\">js<\/span><span class=\"p\">:<\/span><span class=\"mi\">264<\/span><span class=\"p\">:<\/span><span class=\"mi\">11<\/span><span class=\"p\">)<\/span>\r\n   <span class=\"nx\">at<\/span> <span class=\"nx\">Socket<\/span><span class=\"p\">.<\/span><span class=\"nx\">Readable<\/span><span class=\"p\">.<\/span><span class=\"nx\">push<\/span> <span class=\"p\">(<\/span><span class=\"nx\">_stream_readable<\/span><span class=\"p\">.<\/span><span class=\"nx\">js<\/span><span class=\"p\">:<\/span><span class=\"mi\">219<\/span><span class=\"p\">:<\/span><span class=\"mi\">10<\/span><span class=\"p\">)<\/span>\r\n   <span class=\"nx\">at<\/span> <span class=\"nx\">TCP<\/span><span class=\"p\">.<\/span><span class=\"nx\">onread<\/span> <span class=\"p\">(<\/span><span class=\"nx\">net<\/span><span class=\"p\">.<\/span><span class=\"nx\">js<\/span><span class=\"p\">:<\/span><span class=\"mi\">639<\/span><span class=\"p\">:<\/span><span class=\"mi\">20<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u518d\u6765\u8ba8\u8bba\u4e00\u4e0b\u4e0d\u597d\u7684\u4f8b\u5b501\u3002<\/p>\n<p>\u5728&#8221;http:\/\/azu.github.io\/promises-book\/#not-throw-use-reject&#8221;\u8fd9\u4e2a\u7f51\u5740\u4e2d\uff0c\u5305\u542b\u4e86\u4ee5\u4e0b\u7684\u63cf\u8ff0\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0ec737434c4406bed785\/9-0.png\" alt=\"image.png\" \/><\/div>\n<p>\u8fd9\u53e5\u8bdd\u7684\u610f\u601d\u662f\u6307Promise\u5bf9\u8c61\u7684\u72b6\u6001\u662f\u5426\u4e3a\u88ab\u62d2\u7edd\u3002\u6839\u636e\u4e0a\u8ff0\u9875\u9762\u6240\u8ff0\uff0c\u5177\u4f53\u533a\u522b\u5728\u4e8eChrome\u7684\u5f00\u53d1\u5de5\u5177\u4e2d\u662f\u5426\u4f7f\u7528&#8221;\u6682\u505c\u5728\u6355\u83b7\u5f02\u5e38&#8221;\u529f\u80fd\u3002<\/p>\n<p>\u6293\u4f4f\u4e4b\u540e\u611f\u89c9\u6ca1\u6709\u4ec0\u4e48\u533a\u522b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u662f\u6700\u597d\u7684\u3002\u4ee5\u4e0b\u662f\u6355\u83b7\u5f02\u5e38\u5e76\u5c06\u5f02\u5e38toString\u5230\u6d88\u606f\u7684\u4f8b\u5916\u3002 \u5f88\u597d\u7684\u4f8b\u5b50\u3002\u5728catch\u5757\u4e2d\uff0c\u7528Promis [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31936","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5728Node.js\u4e2d\u4f7f\u7528pg\u6a21\u5757\u7f16\u5199catch\u7684\u65b9\u6cd5 - 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\/\u5728node-js\u4e2d\u4f7f\u7528pg\u6a21\u5757\u7f16\u5199catch\u7684\u65b9\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5728Node.js\u4e2d\u4f7f\u7528pg\u6a21\u5757\u7f16\u5199catch\u7684\u65b9\u6cd5\" \/>\n<meta property=\"og:description\" content=\"\u8fd9\u662f\u6700\u597d\u7684\u3002\u4ee5\u4e0b\u662f\u6355\u83b7\u5f02\u5e38\u5e76\u5c06\u5f02\u5e38toString\u5230\u6d88\u606f\u7684\u4f8b\u5916\u3002 \u5f88\u597d\u7684\u4f8b\u5b50\u3002\u5728catch\u5757\u4e2d\uff0c\u7528Promis [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5728node-js\u4e2d\u4f7f\u7528pg\u6a21\u5757\u7f16\u5199catch\u7684\u65b9\u6cd5\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-05T07:41:11+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-29T00:09:14+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0ec737434c4406bed785\/9-0.png\" \/>\n<meta name=\"author\" content=\"\u97f5, \u79d1\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u97f5, \u79d1\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8node-js%e4%b8%ad%e4%bd%bf%e7%94%a8pg%e6%a8%a1%e5%9d%97%e7%bc%96%e5%86%99catch%e7%9a%84%e6%96%b9%e6%b3%95\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8node-js%e4%b8%ad%e4%bd%bf%e7%94%a8pg%e6%a8%a1%e5%9d%97%e7%bc%96%e5%86%99catch%e7%9a%84%e6%96%b9%e6%b3%95\/\",\"name\":\"\u5728Node.js\u4e2d\u4f7f\u7528pg\u6a21\u5757\u7f16\u5199catch\u7684\u65b9\u6cd5 - Blog - Silicon 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