{"id":3236,"date":"2021-01-12T23:10:58","date_gmt":"2021-01-12T15:10:58","guid":{"rendered":"http:\/\/www.salesforcecrm.cn\/?p=3236"},"modified":"2021-01-12T23:10:58","modified_gmt":"2021-01-12T15:10:58","slug":"%e9%97%aa%e7%94%b5web%e7%bb%84%e4%bb%b6%e5%92%8csalesforce%e6%95%b0%e6%8d%ae-%e5%a4%84%e7%90%86%e6%9c%8d%e5%8a%a1%e5%99%a8%e9%94%99%e8%af%af","status":"publish","type":"post","link":"http:\/\/www.ponybai.com\/?p=3236","title":{"rendered":"\u95ea\u7535Web\u7ec4\u4ef6\u548cSalesforce\u6570\u636e &#8211; \u5904\u7406\u670d\u52a1\u5668\u9519\u8bef"},"content":{"rendered":"<h2 id=\"learning-objectives-nbsp\"><span>\u5b66\u4e60\u76ee\u6807<\/span><\/h2>\n<p><span>\u5b8c\u6210\u672c\u5355\u5143\u540e\uff0c\u60a8\u5c06\u80fd\u591f\uff1a<\/span><\/p>\n<ul>\n<li><span>\u8bf4\u660e\u8fde\u63a5\u5c5e\u6027\u65f6\u5982\u4f55\u5904\u7406\u670d\u52a1\u5668\u9519\u8bef\u3002<\/span><\/li>\n<li><span>\u8bf4\u660e\u5982\u4f55\u5904\u7406\u5728\u8fde\u63a5\u529f\u80fd\u65f6\u53d1\u751f\u7684\u670d\u52a1\u5668\u9519\u8bef\u3002<\/span><\/li>\n<li><span>\u8bf4\u660e\u5982\u4f55\u5904\u7406\u5728\u8c03\u7528LDS\u51fd\u6570\u6216\u5f3a\u5236\u6027Apex\u65f6\u53d1\u751f\u7684\u670d\u52a1\u5668\u9519\u8bef\u3002<\/span><\/li>\n<li><span>\u786e\u5b9a\u63a8\u8350\u7684\u4e0e\u6570\u636e\u4ea4\u4e92\u5e76\u5904\u7406\u7279\u5b9a\u7528\u4f8b\u9519\u8bef\u7684\u65b9\u5f0f\u3002<\/span><\/li>\n<\/ul>\n<h2 id=\"handle-server-errors-in-lightning-web-components\"><span>\u5904\u7406\u95ea\u7535Web\u7ec4\u4ef6\u4e2d\u7684\u670d\u52a1\u5668\u9519\u8bef<\/span><\/h2>\n<p><span>LDS\u7ebf\u9002\u914d\u5668\uff0cLDS\u529f\u80fd\u548c\u5bf9Apex\u7684\u8c03\u7528\u5f15\u53d1\u7684\u9519\u8bef\u5177\u6709\u7279\u5b9a\u7684\u7ed3\u6784\u3002\u8981\u68c0\u7d22\u6709\u5173\u9519\u8bef\u7684\u4fe1\u606f\uff0c\u8bf7\u5728JavaScript\u4ee3\u7801\u4e2d\u5904\u7406\u9519\u8bef\u54cd\u5e94\u3002\u7136\u540e\uff0c\u60a8\u53ef\u4ee5\u5411\u7528\u6237\u663e\u793a\u9519\u8bef\u7684\u5185\u5bb9\u3002<\/span><\/p>\n<p><span>\u4f5c\u4e3a\u5f00\u53d1\u4eba\u5458\uff0c\u60a8\u53ef\u4ee5\u51b3\u5b9a\u5982\u4f55\u5411\u7528\u6237\u663e\u793a\u9519\u8bef\uff1a\u9519\u8bef\u9762\u677f\uff0c\u795d\u9152\u6d88\u606f\u6216\u5176\u4ed6\u5185\u5bb9\u3002\u51fa\u4e8e\u5b66\u4e60\u76ee\u7684\uff0c\u6b64\u6a21\u5757\u4e2d\u7684\u793a\u4f8b\u901a\u8fc7\u5f15\u7528<\/span><code>errors<\/code><span>\u6807\u8bb0\u4e2d\u7684\u5c5e\u6027\u6765\u663e\u793a\u9519\u8bef\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/span><\/p>\n<p><strong><span>errors.html<\/span><\/strong><\/p>\n<div>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\"><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span>template<span class=\"token punctuation\">&gt;<\/span><\/span>\n    <span class=\"token operator\">&lt;<\/span>template <span class=\"token keyword\">if<\/span><span class=\"token operator\">:<\/span><span class=\"token boolean\">true<\/span><span class=\"token operator\">=<\/span><span class=\"token punctuation\">{<\/span>errors<span class=\"token punctuation\">}<\/span><span class=\"token operator\">&gt;<\/span>\n        <span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span>p<span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">{<\/span>errors<span class=\"token punctuation\">}<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>p<span class=\"token operator\">&gt;<\/span>\n    <span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>template<span class=\"token operator\">&gt;<\/span>\n<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>template<span class=\"token operator\">&gt;<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><span>\u5982\u4f55\u4f7f\u7528JavaScript\u5904\u7406\u670d\u52a1\u5668\u9519\u8bef\u53d6\u51b3\u4e8e\u60a8\u5982\u4f55\u4ea4\u4e92Salesforce\u6570\u636e\u3002\u8ba9\u6211\u4eec\u63a2\u7d22\u4e09\u4e2a\u793a\u4f8b\uff1a\u6709\u7ebf\u5c5e\u6027\uff0c\u6709\u7ebf\u529f\u80fd\u548c\u547d\u4ee4\u5f0f\u8c03\u7528\u3002<\/span><\/p>\n<h3 id=\"handling-errors-on-wired-properties\"><span>\u5904\u7406\u8fde\u7ebf\u5c5e\u6027\u9519\u8bef<\/span><\/h3>\n<p><span>\u5f53\u60a8\u4f7f\u7528<\/span><code>@wire<\/code><span>\u88c5\u9970\u7684\u5c5e\u6027\uff0c\u9519\u8bef\u662f\u5728\u5c5e\u6027\u8bbf\u95ee<\/span><code>error<\/code><span>\u5c5e\u6027\u3002\u5f53<\/span><code>@wire<\/code><span>\u4e0eLDS\u7ebf\u9002\u914d\u5668\u6216Apex\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u6b64\u8bbe\u7f6e\u6709\u6548\u00a0\u3002<\/span><\/p>\n<p><strong><span>wireApexProperty.js<\/span><\/strong><\/p>\n<div>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\"><span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token class-name\">LightningElement<\/span><span class=\"token punctuation\">,<\/span> api<span class=\"token punctuation\">,<\/span> wire <span class=\"token punctuation\">}<\/span> from <span class=\"token string\">'lwc'<\/span><span class=\"token punctuation\">;<\/span>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> reduceErrors <span class=\"token punctuation\">}<\/span> from <span class=\"token string\">'c\/ldsUtils'<\/span><span class=\"token punctuation\">;<\/span>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">getRelatedContacts<\/span> from <span class=\"token string\">'@salesforce\/apex\/AccountController.getRelatedContacts'<\/span><span class=\"token punctuation\">;<\/span>\nexport <span class=\"token keyword\">default<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">WireApexProperty<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">LightningElement<\/span> <span class=\"token punctuation\">{<\/span>\n    <span class=\"token annotation punctuation\">@api<\/span> recordId<span class=\"token punctuation\">;<\/span>\n    <span class=\"token annotation punctuation\">@wire<\/span><span class=\"token punctuation\">(<\/span>getRelatedContacts<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">{<\/span> accountId<span class=\"token operator\">:<\/span> <span class=\"token string\">'$recordId'<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span>\n    contacts<span class=\"token punctuation\">;<\/span>\n    get <span class=\"token function\">errors<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>contacts<span class=\"token punctuation\">.<\/span>error<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">?<\/span>\n            <span class=\"token function\">reduceErrors<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>contacts<span class=\"token punctuation\">.<\/span>error<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">:<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><span>\u4ee3\u7801\u91cd\u70b9\uff1a<\/span><\/p>\n<ul>\n<li><span>\u7b2c2\u884c\uff1a\u6211\u4eec<\/span><code>reduceErrors<\/code><span>\u00a0\u4ece<\/span><code>ldsUtils<\/code><span>\u6a21\u5757\u5bfc\u5165\u4e86\u00a0\u8f85\u52a9\u51fd\u6570\u3002\uff08\u60a8<\/span><code>ldsUtils<\/code><span>\u7a0d\u540e\u5c06\u5728\u672c\u5355\u5143\u4e2d\u5c06\u6a21\u5757\u6dfb\u52a0\u00a0\u5230\u9879\u76ee\u4e2d\u3002\uff09<\/span><\/li>\n<li><span>\u7b2c6-7\u884c\uff1a\u88c5\u9970<\/span><code>contacts<\/code><span>\u5c5e\u6027\u4ee5\u00a0<\/span><code>@wire<\/code><span>\u5c06\u5176\u8fde\u63a5\u5230\u00a0<\/span><code>getRelatedContacts<\/code><span>\u51fd\u6570\u3002<\/span><\/li>\n<li><span>\u7b2c8\u884c\uff1a\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2agetter\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a\u7684\u5c5e\u6027\u00a0<\/span><code>errors<\/code><span>\u3002\u6bcf\u6b21<\/span><code>this.contacts.error<\/code><span>\u66f4\u6539\u65f6\uff0cgetter\u90fd\u4f1a\u66f4\u65b0<\/span><code>errors<\/code><span>\u5c5e\u6027\u7684\u503c\u3002\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\u662f\u7531\u4e8e\u00a0<\/span><span>\u53cd\u5e94\u6027<\/span><span>\u3002<\/span><\/li>\n<li><span>\u7b2c10\u884c\uff1a\u5728getter\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528<\/span><code>reduceErrors<\/code><span>helper\u51fd\u6570\u6765\u683c\u5f0f\u5316<\/span><code>this.contacts.error<\/code><span>\u3002\u8be5\u51fd\u6570\u5c06\u51cf\u5c11\u63a5\u6536\u5230\u7684\u9519\u8bef\u5bf9\u8c61\uff0c\u5e76\u8fd4\u56de\u6240\u6709\u5df2\u53d1\u751f\u9519\u8bef\u6d88\u606f\u7684\u6570\u7ec4\u3002<\/span><\/li>\n<\/ul>\n<div class=\"box message info\">\n<div class=\"inner\">\n<div class=\"bd\">\n<div class=\"media\">\n<div class=\"mediaBd\">\n<h4 class=\"mbs\"><span>\u6ce8\u610f<\/span><\/h4>\n<div class=\"message-media-content\">\n<p><code>reduceErrors<\/code><span>\u672c\u793a\u4f8b\u4e2d\u00a0\u7684\u5e2e\u52a9\u5668\u529f\u80fd\u6765\u81eaLWC Recipes\u00a0\u793a\u4f8b\u5e94\u7528\u7a0b\u5e8f\u7684<\/span><code>ldsUtils<\/code><span>\u6a21\u5757\u00a0\u3002LWC\u98df\u8c31\u5305\u542b\u4ee5Lightning Web\u7ec4\u4ef6\u5b9e\u73b0\u7684\u5e38\u89c1\u6a21\u5f0f\u7684\u7b80\u5355\u6613\u61c2\u7684\u793a\u4f8b\u3002\u968f\u65f6\u5c06\u6a21\u5757\u590d\u5236\u5230\u60a8\u7684\u9879\u76ee\u4e2d\uff0c\u7136\u540e\u4f7f\u7528\u8be5\u529f\u80fd\u3002\u00a0<\/span><code>ldsUtils<\/code><code>reduceErrors<\/code><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3 id=\"handling-errors-on-wired-functions\"><span>\u5904\u7406\u6709\u7ebf\u529f\u80fd\u4e0a\u7684\u9519\u8bef<\/span><\/h3>\n<p><span>\u5f53\u4f7f\u7528<\/span><code>@wire<\/code><span>\u88c5\u9970\u7684\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u63a5\u6536\u7684\u5bf9\u8c61\uff0c\u5176\u5305\u62ec\u9519\u8bef\uff08\u5982\u679c\u6709\u4efb\u4f55\u9519\u8bef\uff09\u3002\u5f53<\/span><code>@wire<\/code><span>\u4e0eLDS\u7ebf\u9002\u914d\u5668\u6216Apex\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u8fd9\u9002\u7528\u3002<\/span><\/p>\n<p><strong><span>wireApexFunction.js<\/span><\/strong><\/p>\n<div>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\"><span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token class-name\">LightningElement<\/span><span class=\"token punctuation\">,<\/span> api<span class=\"token punctuation\">,<\/span> wire <span class=\"token punctuation\">}<\/span> from <span class=\"token string\">'lwc'<\/span><span class=\"token punctuation\">;<\/span>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> reduceErrors <span class=\"token punctuation\">}<\/span> from <span class=\"token string\">'c\/ldsUtils'<\/span><span class=\"token punctuation\">;<\/span>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">getRelatedContacts<\/span> from <span class=\"token string\">'@salesforce\/apex\/AccountController.getRelatedContacts'<\/span><span class=\"token punctuation\">;<\/span>\nexport <span class=\"token keyword\">default<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">WireApexFunction<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">LightningElement<\/span> <span class=\"token punctuation\">{<\/span>\n    <span class=\"token annotation punctuation\">@api<\/span> recordId<span class=\"token punctuation\">;<\/span>\n    errors<span class=\"token punctuation\">;<\/span>\n    <span class=\"token annotation punctuation\">@wire<\/span><span class=\"token punctuation\">(<\/span>getRelatedContacts<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">{<\/span> accountId<span class=\"token operator\">:<\/span> <span class=\"token string\">'$recordId'<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span>\n    <span class=\"token function\">wiredContacts<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span>data<span class=\"token punctuation\">,<\/span> error<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>error<span class=\"token punctuation\">)<\/span>\n            <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>errors <span class=\"token operator\">=<\/span> <span class=\"token function\">reduceErrors<\/span><span class=\"token punctuation\">(<\/span>error<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><span>\u4ee3\u7801\u91cd\u70b9\uff1a<\/span><\/p>\n<ul>\n<li><span>\u7b2c2\u884c\uff1a\u6211\u4eec<\/span><code>reduceErrors<\/code><span>\u4ece<\/span><code>ldsUtils<\/code><span>\u6a21\u5757\u4e2d\u5bfc\u5165\u4e86\u8f85\u52a9\u51fd\u6570\u00a0\uff08\u5c31\u50cf\u5728wireApexProperty\u793a\u4f8b\u4e2d\u6240\u505a\u7684\u90a3\u6837\uff09\u3002<\/span><\/li>\n<li><span>\u7b2c\u4e09\u884c\uff1a\u6211\u4eec<\/span><code>getRelatedContacts<\/code><span>\u4ece<\/span><code>AccountController<\/code><span>\u7c7b\u4e2d\u5bfc\u5165\u51fd\u6570\u00a0\u3002<\/span><\/li>\n<li><span>\u7b2c6\u884c\uff1a\u6211\u4eec\u5b9a\u4e49<\/span><code>errors<\/code><span>\u5c5e\u6027\u3002<\/span><\/li>\n<li><span>\u7b2c7\u20138\u884c\uff1a\u88c5\u9970<\/span><code>wiredContacts<\/code><span>\u51fd\u6570\u4ee5\u00a0<\/span><code>@wire<\/code><span>\u5c06\u5176\u8fde\u63a5\u5230\u00a0<\/span><code>getRelatedContacts<\/code><span>\u51fd\u6570\u3002<\/span><\/li>\n<li><span>\u7b2c10\u884c\uff1a\u6bcf\u6b21\u6709\u7ebf\u51fd\u6570\u63a5\u6536\u5230\u9519\u8bef\u65f6\uff0c\u6211\u4eec\u90fd\u4f1a\u4f7f\u7528\u00a0<\/span><code>reduceErrors<\/code><span>helper\u51fd\u6570\u5bf9\u5176\u8fdb\u884c\u683c\u5f0f\u5316\u3002\u8be5\u51fd\u6570\u8fd4\u56de\u6240\u6709\u5df2\u53d1\u751f\u9519\u8bef\u7684\u6570\u7ec4\u3002<\/span><\/li>\n<\/ul>\n<h3 id=\"handling-errors-when-calling-a-function-imperatively\"><span>\u5f3a\u5236\u8c03\u7528\u51fd\u6570\u65f6\u7684\u9519\u8bef\u5904\u7406<\/span><\/h3>\n<p><span>\u5982\u679c\u5fc5\u987b\u5f3a\u5236\u8c03\u7528LDS\u51fd\u6570\u6216Apex\u65b9\u6cd5\uff0c\u5219\u670d\u52a1\u5668\u4f1a\u5c06\u9519\u8bef\u4f5c\u4e3a\u53c2\u6570\u8fd4\u56de\u5230catch\u65b9\u6cd5\u7684\u56de\u8c03\u51fd\u6570\u3002<\/span><\/p>\n<p><strong><span>callApexImperative.js<\/span><\/strong><\/p>\n<div>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\"><span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token class-name\">LightningElement<\/span><span class=\"token punctuation\">,<\/span> api<span class=\"token punctuation\">,<\/span> wire <span class=\"token punctuation\">}<\/span> from <span class=\"token string\">'lwc'<\/span><span class=\"token punctuation\">;<\/span>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> reduceErrors <span class=\"token punctuation\">}<\/span> from <span class=\"token string\">'c\/ldsUtils'<\/span><span class=\"token punctuation\">;<\/span>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">getRelatedContacts<\/span> from <span class=\"token string\">'@salesforce\/apex\/AccountController.getRelatedContacts'<\/span><span class=\"token punctuation\">;<\/span>\nexport <span class=\"token keyword\">default<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">CallApexImperative<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">LightningElement<\/span> <span class=\"token punctuation\">{<\/span>\n    <span class=\"token annotation punctuation\">@api<\/span> recordId<span class=\"token punctuation\">;<\/span>\n    errors<span class=\"token punctuation\">;<\/span>\n    <span class=\"token function\">handleButtonClick<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\n        <span class=\"token function\">getRelatedContacts<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span>\n            accountId<span class=\"token operator\">:<\/span> <span class=\"token string\">'$recordId'<\/span>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">then<\/span><span class=\"token punctuation\">(<\/span>contacts <span class=\"token operator\">=<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token punctuation\">{<\/span>\n                <span class=\"token comment\">\/\/ code to execute if the promise is resolved<\/span>\n            <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span>\n            <span class=\"token punctuation\">.<\/span><span class=\"token keyword\">catch<\/span><span class=\"token punctuation\">(<\/span>error <span class=\"token operator\">=<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token punctuation\">{<\/span>\n                <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>errors <span class=\"token operator\">=<\/span> <span class=\"token function\">reduceErrors<\/span><span class=\"token punctuation\">(<\/span>error<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ code to execute if the promise is rejected<\/span>\n            <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><span>\u4ee3\u7801\u91cd\u70b9\uff1a<\/span><\/p>\n<ul>\n<li><span>\u7b2c2\u884c\uff1a\u6211\u4eec\u5bfc\u5165\u4e86<\/span><code>reduceErrors<\/code><span>\u8f85\u52a9\u51fd\u6570\u3002<\/span><\/li>\n<li><span>\u7b2c6\u884c\uff1a\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3a\u7684\u5c5e\u6027<\/span><code>errors<\/code><span>\u3002<\/span><\/li>\n<li><span>\u7b2c8\u884c\uff1a\u6211\u4eec<\/span><code>getRelatedContacts<\/code><span>\u5f3a\u5236\u8c03\u7528\u8be5\u51fd\u6570\u3002\u8be5\u51fd\u6570\u8fd4\u56de\u4e00\u4e2apromise\u3002<\/span><\/li>\n<li><span>\u7b2c11-13\u884c\uff1a\u5982\u679c\u8bfa\u8a00\u5f97\u4ee5\u5151\u73b0\uff0c\u6211\u4eec\u5c06\u8fdb\u884c\u5904\u7406<\/span><code>contacts<\/code><span>\u3002<\/span><\/li>\n<li><span>\u7b2c14-16\u884c\uff1a\u5982\u679c\u627f\u8bfa\u88ab\u62d2\u7edd\uff0c\u6211\u4eec\u5c06\u4f7f\u7528\u00a0<\/span><code>reduceErrors<\/code><span>helper\u51fd\u6570\u6765\u683c\u5f0f\u5316\u63a5\u6536\u5230\u7684\u9519\u8bef\u5e76\u5c06\u5176\u5b58\u50a8\u5728<\/span><code>errors<\/code><span>\u5c5e\u6027\u4e2d\u3002<\/span><\/li>\n<\/ul>\n<h2 id=\"handle-errors-in-the-account-list-component\"><span>\u5904\u7406accountList\u7ec4\u4ef6\u4e2d\u7684\u9519\u8bef<\/span><\/h2>\n<p><span>\u8ba9\u6211\u4eec\u5411\u60a8\u521b\u5efa\u7684accountList\u7ec4\u4ef6\u6dfb\u52a0\u9519\u8bef\u5904\u7406\u3002<\/span><\/p>\n<ol>\n<li><span>\u5728accountList.html\u6587\u4ef6\u4e2d\uff0c\u5728<\/span><code>&lt;template&gt;<\/code><span>\u5305\u62ec\u7684<\/span><code>lightning-datatable<\/code><span>\u4e4b\u540e\u6dfb\u52a0\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/span>\n<div>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\"><span class=\"token operator\">&lt;<\/span>template <span class=\"token keyword\">if<\/span><span class=\"token operator\">:<\/span><span class=\"token boolean\">true<\/span><span class=\"token operator\">=<\/span><span class=\"token punctuation\">{<\/span>errors<span class=\"token punctuation\">}<\/span><span class=\"token operator\">&gt;<\/span>\n    <span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span>p<span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">{<\/span>errors<span class=\"token punctuation\">}<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>p<span class=\"token operator\">&gt;<\/span>\n<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>template<span class=\"token operator\">&gt;<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/li>\n<li><code>ldsUtils<\/code><span>\u4ece<\/span><span>LWC\u914d\u65b9\u4e2d<\/span><span>\u00a0\u590d\u5236\u7ec4\u4ef6\uff0c\u00a0\u5e76\u5c06\u5176\u5305\u542b\u5728\u9879\u76ee\u7684<\/span><strong><span>force-app \/ main \/ default \/ lwc<\/span><\/strong><span>\u6587\u4ef6\u5939\u4e2d\u3002\u8be5\u7ec4\u4ef6\u5305\u542b\u00a0<\/span><code>reduceErrors<\/code><span>\u529f\u80fd\u3002<\/span><\/li>\n<li><span>\u5728<\/span><code>reduceErrors<\/code><span>accountList.js\u5f00\u5934\u9644\u8fd1\u5bfc\u5165\u51fd\u6570\u3002<\/span>\n<div>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\"><span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> reduceErrors <span class=\"token punctuation\">}<\/span> from <span class=\"token string\">'c\/ldsUtils'<\/span><span class=\"token punctuation\">;<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/li>\n<li><span>\u5728accountList.js\u4e2d\uff0c\u63d2\u5165\u6b64getter\uff0c\u5b83\u5b9a\u4e49\u4e86\u4e00\u4e2a\u00a0<\/span><code>errors<\/code><span>\u5c5e\u6027\uff1a<\/span>\n<div>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\">get <span class=\"token function\">errors<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\n    <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>accounts<span class=\"token punctuation\">.<\/span>error<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">?<\/span>\n        <span class=\"token function\">reduceErrors<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>accounts<span class=\"token punctuation\">.<\/span>error<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">:<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\n<span class=\"token punctuation\">}<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/li>\n<li><span>\u8981\u6d4b\u8bd5\u9519\u8bef\u5904\u7406\uff0c<\/span><code>getAccounts<\/code><span>\u901a\u8fc7\u6ce8\u91ca\u65b9\u6cd5\u7684\u4e3b\u4f53\uff08\u4e34\u65f6\uff09\u5e76\u5728\u6b64\u4f4d\u7f6e\u6dfb\u52a0\u4ee5\u4e0b\u4ee3\u7801\u6765\u5f3a\u5236\u65b9\u6cd5\uff08\u5728AccountController.cls\u4e2d\uff09\u5f15\u53d1\u9519\u8bef\uff1a<\/span>\n<div>\n<div class=\"code-toolbar\">\n<pre class=\"line-numbers language-java\"><code class=\"language-java\"><span class=\"token keyword\">throw<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">AuraHandledException<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">'Forced error'<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/code><\/pre>\n<div class=\"toolbar\">\n<div class=\"toolbar-item\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/li>\n<li><span>\u4fdd\u5b58\u60a8\u7f16\u8f91\u7684\u4e09\u4e2a\u6587\u4ef6\uff1aaccountList.html\uff0caccountList.js\u548cAccountController.cls\u3002<\/span><\/li>\n<li><span>\u90e8\u7f72\u9879\u76ee\u6587\u4ef6\uff08\u6765\u81ea<\/span><code>force-app\/main\/default<\/code><span>\uff09\u3002<\/span><\/li>\n<li><span>\u5982\u679c\u5c1a\u672a\u6253\u5f00\uff0c\u8bf7\u6253\u5f00\u60a8\u7684Trailhead Playground\u3002<\/span><\/li>\n<li><span>\u8981\u68c0\u67e5\u7ed3\u679c\uff0c\u8bf7\u5237\u65b0\u201c\u4f7f\u7528\u6570\u636e\u201d\u9875\u9762\u3002<\/span><br \/>\n<strong><span>\u63d0\u793a<\/span><\/strong><span>\uff1a\u7531\u4e8eLightning Data Service\u7f13\u5b58\u7ed3\u679c\uff0c\u56e0\u6b64\u60a8\u53ef\u80fd\u9700\u8981\u6e05\u9664\u7f13\u5b58\uff0c\u7136\u540e\u624d\u80fd\u770b\u5230\u5f3a\u5236\u9519\u8bef\u5728\u8d77\u4f5c\u7528\u3002<\/span><\/li>\n<\/ol>\n<h2 id=\"summary\"><span>\u6982\u8981<\/span><\/h2>\n<p><span>\u73b0\u5728\uff0c\u60a8\u77e5\u9053\u4e86\u4e0eLightning Web\u7ec4\u4ef6\u4e2d\u7684Salesforce\u6570\u636e\u8fdb\u884c\u4ea4\u4e92\u7684\u51e0\u79cd\u65b9\u6cd5\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u67d0\u4e9b\u89e3\u51b3\u65b9\u6848\u4f18\u4e8e\u5176\u4ed6\u89e3\u51b3\u65b9\u6848\u3002\u4e0b\u8868\u6309\u7528\u4f8b\u603b\u7ed3\u4e86\u63a8\u8350\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/span><\/p>\n<p><span>\u4e0eSalesforce\u6570\u636e\u8fdb\u884c\u4ea4\u4e92\u7684\u7528\u4f8b<\/span><\/p>\n<table class=\"featureTable sort_table\">\n<thead class=\"thead sorted\">\n<tr>\n<th width=\"35%\"><span>\u7528\u4f8b<\/span><\/th>\n<th width=\"30%\"><span>\u63a8\u8350\u7684\u89e3\u51b3\u65b9\u6848<\/span><\/th>\n<th width=\"35%\"><span>\u7b14\u8bb0<\/span><\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"tbody\">\n<tr>\n<td><span>\u67e5\u770b\u6216\u7f16\u8f91\u6307\u5b9a\u5176\u5e03\u5c40\u6216\u5b57\u6bb5\u5217\u8868\u7684\u8bb0\u5f55<\/span><\/td>\n<td><code>lightning-record-form<br \/>\n<\/code><\/td>\n<td>\n<div><\/div>\n<\/td>\n<\/tr>\n<tr>\n<td><span>\u4f7f\u7528\u81ea\u5b9a\u4e49\u8868\u5355\u5e03\u5c40\u6216\u8bb0\u5f55\u6570\u636e\u7684\u81ea\u5b9a\u4e49\u5448\u73b0\u65b9\u5f0f\u67e5\u770b\u8bb0\u5f55<\/span><\/td>\n<td><code>lightning-record-view-form<br \/>\n<\/code><\/td>\n<td>\n<div><\/div>\n<\/td>\n<\/tr>\n<tr>\n<td><span>\u4f7f\u7528\u81ea\u5b9a\u4e49\u8868\u5355\u5e03\u5c40\uff0c\u81ea\u5b9a\u4e49\u8bb0\u5f55\u6570\u636e\u5448\u73b0\u6216\u9884\u586b\u5145\u5b57\u6bb5\u503c\u6765\u7f16\u8f91\u8bb0\u5f55<\/span><\/td>\n<td><code>lightning-record-edit-form<br \/>\n<\/code><\/td>\n<td>\n<div><\/div>\n<\/td>\n<\/tr>\n<tr>\n<td><span>\u8bfb\u53d6\u5143\u6570\u636e\u6216\u8bfb\u53d6\u4e00\u6761\u8bb0\u5f55\u7684\u6570\u636e<\/span><\/td>\n<td><span>LDS\u7535\u7ebf\u9002\u914d\u5668<\/span><\/td>\n<td><span>\u53ef\u4ee5\u5408\u5e76\uff0c\u4f46\u64cd\u4f5c\u5c06\u5728\u72ec\u7acb\u4e8b\u52a1\u4e0a\u8fd0\u884c<\/span><\/td>\n<\/tr>\n<tr>\n<td><span>\u521b\u5efa\uff0c\u7f16\u8f91\u6216\u5220\u9664\u4e00\u6761\u8bb0\u5f55<\/span><\/td>\n<td><span>LDS\u529f\u80fd<\/span><\/td>\n<td><span>\u53ef\u4ee5\u5408\u5e76\uff0c\u4f46\u64cd\u4f5c\u5c06\u5728\u72ec\u7acb\u4e8b\u52a1\u4e0a\u8fd0\u884c<\/span><\/td>\n<\/tr>\n<tr>\n<td><span>\u8bfb\u53d6\u591a\u6761\u8bb0\u5f55<\/span><\/td>\n<td><span>\u81f4\u7535Apex\u00a0<\/span><code>@wire<\/code><\/td>\n<td><span>\u4f7f\u7528\u4ee5\u4e0b\u6ce8\u91caApex\u65b9\u6cd5\u00a0<\/span><code>cacheable=true<\/code><\/td>\n<\/tr>\n<tr>\n<td><span>\u4e00\u6b21\u6027\u8bfb\u53d6\u591a\u4e2a\u8bb0\u5f55\u6216\u4fee\u6539\u591a\u4e2a\u8bb0\u5f55<\/span><\/td>\n<td><span>\u5fc5\u987b\u81f4\u7535Apex<\/span><\/td>\n<td><span>\u5bf9\u4e8e\u8bfb\u53d6\uff0c\u8bf7\u4f7f\u7528\u4ee5\u4e0b\u6ce8\u91caApex\u65b9\u6cd5\u00a0<\/span><code>cacheable=true<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span>\u5f53\u60a8\u5728Lightning Web\u7ec4\u4ef6\u4e2d\u4f7f\u7528\u6570\u636e\u65f6\uff0c\u9519\u8bef\u5904\u7406\u4f1a\u6709\u6240\u4e0d\u540c\u3002\u60a8\u5982\u4f55\u8bbf\u95ee\u9519\u8bef\u53d6\u51b3\u4e8e\u60a8\u5982\u4f55\u4e0e\u6570\u636e\u8fdb\u884c\u4ea4\u4e92\u3002<\/span><\/p>\n<p><span>\u5904\u7406\u670d\u52a1\u5668\u9519\u8bef<\/span><\/p>\n<table class=\"featureTable sort_table\">\n<thead class=\"thead sorted\">\n<tr>\n<th><span>\u5982\u4f55\u5904\u7406\u6570\u636e<\/span><\/th>\n<th><span>\u5982\u4f55\u8bbf\u95ee\u670d\u52a1\u5668\u9519\u8bef<\/span><\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"tbody\">\n<tr>\n<td><span>\u4f7f\u7528LDS\u7ebf\u9002\u914d\u5668\u6216Apex\u65b9\u6cd5\uff0c\u5e76\u88c5\u9970\u5c5e\u6027<\/span><\/td>\n<td><span>\u4f7f\u7528<\/span><code>reduceErrors<\/code><span>\u6765\u5904\u7406\u6240\u8fd4\u56de\u7684\u6709\u7ebf\u8d22\u4ea7\u7684\u9519\u8bef<\/span><code>decoratedProperty.error<\/code><\/td>\n<\/tr>\n<tr>\n<td><span>\u4f7f\u7528LDS\u7ebf\u9002\u914d\u5668\u6216Apex\u65b9\u6cd5\uff0c\u5e76\u88c5\u9970\u529f\u80fd<\/span><\/td>\n<td><span>\u4f7f\u7528<\/span><code>reduceErrors<\/code><span>\u6765\u5904\u7406\u5728\u901a\u8fc7\u6709\u7ebf\u529f\u80fd\u63a5\u6536\u5bf9\u8c61\u53c2\u6570\u8fd4\u56de\u9519\u8bef<\/span><\/p>\n<div><\/div>\n<p><code>decoratedFunction({data, error}) {...}<br \/>\n<\/code><\/td>\n<\/tr>\n<tr>\n<td><span>\u5f3a\u5236\u8c03\u7528LDS\u8fde\u7ebf\u51fd\u6570\u6216Apex\u65b9\u6cd5<\/span><\/td>\n<td><span>\u4f7f\u7528<\/span><code>reduceErrors<\/code><span>\u6765\u5904\u7406\u771f\u5b9e\u6536\u5230\u7684\u6355\u635e\u65b9\u6cd5\u7684\u56de\u8c03\u51fd\u6570\u4e2d\u7684\u53c2\u6570\u9519\u8bef<\/span><\/p>\n<div><\/div>\n<p><code>functionToInvoke()<br \/>\n.then(data =&gt; {...})<br \/>\n.catch(error =&gt; {...});<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"wrap-up\"><span>\u5305\u8d77\u6765<\/span><\/h2>\n<p><span>\u5728\u672c\u6a21\u5757\u4e2d\uff0c\u60a8\u4e86\u89e3\u4e86\u5728Lightning Web\u7ec4\u4ef6\u4e2d\u4f7f\u7528Salesforce\u6570\u636e\u7684\u4e0d\u540c\u65b9\u6cd5\u3002\u60a8\u4e86\u89e3\u4e86\u6bcf\u79cd\u6280\u672f\u7684\u4f18\u7f3a\u70b9\uff0c\u4f55\u65f6\u63a8\u8350\u6bcf\u79cd\u6280\u672f\u4ee5\u53ca\u5982\u4f55\u5b9e\u73b0\u6bcf\u79cd\u89e3\u51b3\u65b9\u6848\u3002\u60a8\u8fd8\u6839\u636e\u4e0eSalesforce\u6570\u636e\u7684\u4ea4\u4e92\u65b9\u5f0f\u5b66\u4e60\u4e86\u5982\u4f55\u5904\u7406Lightning Web\u7ec4\u4ef6\u4e2d\u7684\u670d\u52a1\u5668\u9519\u8bef\u3002<\/span><\/p>\n<p><span>\u8981\u7ee7\u7eed\u4e86\u89e3\u6709\u5173\u5728Lightning 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