blocks|key|353964|text|matches.options构造一个正则表达式。可以将regex作为数组的第一个元素传递。试试这个：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|353965|var+schema+=+{
++"role":+{
++++in:+'body',
++++matches:+{
++++++options:+[/\b(?:administrator%7Ceditor%7Ccontributor%7Cuser)\b/],
++++++errorMessage:+"Invalid+role"
++++}
++}
}|code-block|syntax|javascript|353966|entityMap^0|0|F|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

The <code>matches.options</code> constructs a regex. You can pass in your regex as the first element of the array. Try this:

<pre><code>var schema = {
 "role": {
 in: 'body',
 matches: {
 options: [/\b(?:administrator|editor|contributor|user)\b/],
 errorMessage: "Invalid role"
 }
 }
}
</code></pre>

blocks|key|355438|text|作为一种选择，您可以使用此模式：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|355439|+var+schema+=+{
++"role":+{
++++in:+'body',
++++isIn:+{
++++++options:+[["administrator",+"editor",+"contributor",+"user"]],
++++++errorMessage:+"Invalid+role"
++++}
++}
}|code-block|syntax|javascript|355440|更多关于本期的报道。|offset|length|355441|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/express-validator/express-validator/issues/192^0|0|0|4|2|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

As an alternative you can use this schema:

<pre><code> var schema = {
 "role": {
 in: 'body',
 isIn: {
 options: [["administrator", "editor", "contributor", "user"]],
 errorMessage: "Invalid role"
 }
 }
}
</code></pre>

More on <a href="https://github.com/express-validator/express-validator/issues/192" rel="noreferrer">this issue</a>.

blocks|key|355459|text|我的方法是使用isIn()|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|355460|check('action').isIn(['like',+'dislike']).run(req)|code-block|syntax|javascript|355461|entityMap^0|7|6|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

The way I do it is by using <code>isIn()</code>
<pre><code>check('action').isIn(['like', 'dislike']).run(req)
</code></pre>

blocks|key|1184982|text|对我来说，mkhanoyan先生描述的方法没有正常工作，在测试中我用附加符号传递字符串值，并且它通过了，所以这是错误的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1184983|我成功地创建了自定义enum验证器：|1184984|app.use(expressValidator({
++customValidators:+{
++++enum:+(input,+options)+=>+options.includes(input)
++}
}));|code-block|syntax|javascript|1184985|在控制器中，我也是这样使用它的：|1184986|req.checkBody('productType').notEmpty().enum(['car',+'tire']);|1184987|“！car”、“cahsjhacardasdas”和其他无效输入测试都失败了|1184988|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

For me the approach described by mr mkhanoyan didnt worked properly, in tests I passed string value with additional symbols and it passed, so that was wrong beheviour

I managed to create custom enum validator:

<pre><code>app.use(expressValidator({
 customValidators: {
 enum: (input, options) =&gt; options.includes(input)
 }
}));
</code></pre>

Also in controller, I use it like this: 

<pre><code>req.checkBody('productType').notEmpty().enum(['car', 'tire']);
</code></pre>

Tests are failing with '!car', 'cahsjhacardasdas' and other invalid inputs

blocks|key|1185051|text|由于这篇文章是在一段时间前发布的，有些事情发生了变化，我想是时候进行更新了：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1185052|根据快速验证器5.2.0的文档，建议为验证架构提供以下语法(请注意，在调用note解析器之前，调用快速验证器和函数名checkSchema非常重要)：|1185053|app.js|1185054|const+bodyParser+=+require('body-parser');
const+expressValidator+=+require('express-validator');

/*+Initialize/Mount+BodyParser+for+parsing+application/x-www-form-urlencoded+*/
app.use(bodyParser.urlencoded({+extended:+false+}));

/*+Initialize/Mount+BodyParser+for+parsing+application/json+*/
app.use(bodyParser.json());

/*+Initialize/Mount+Express-Validator+for+validating+user+input+from+the+frontend+*/
app.use(expressValidator());|code-block|syntax|javascript|1185055|在路由中(以下是一个注册示例)：|1185056|/*+INFO:+Require+express+validator+*/
const+{+check,+checkSchema,+validationResult+}+=+require('express-validator/check');

var+Schema+=+{
++"role":+{
++++in:+'body',
++++matches:+{
++++++options:+[/\b(?:administrator%7Ceditor%7Ccontributor%7Cuser)\b/],
++++++errorMessage:+"Invalid+role"
++++}
++}
}

module.exports+=+(router)+=>+{
++router.post('/register',+[
++++//+INFO:+check+validty
++++check('username',"Invalid+username").isLength({min:+5}),
++++check('email',"Invalid++e-mail").isEmail(),
++++check('department',"Invalid+department").isLength({min:+3}),
++++checkSchema(Schema),
++++check('password',"Invalid++password").isLength({min:+5})
++++],+

++++function(req,+res,+next)+{++
++++++const+errors+=+validationResult(req);
++++++if+(!errors.isEmpty())+{
+++++++++//+DO+THIS
++++++}
++++++else+{
+++++++++//+DO+THAT
++++++}
+++++});
++++return+router;
}+++++++++|1185057|entityMap|0|LINK|mutability|MUTABLE|url|https://express-validator.github.io/docs/check-api.html|1|https://express-validator.github.io/docs/schema-validation.html^0|Y|4|0|18|5|1M|B|D|2|0|J|4|1|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|15|8|@$9|16|A|17|B|C]|$9|18|A|19|B|C]]|D|@$9|1A|A|1B|1|1C]|$9|1D|A|1E|1|1F]]|E|$]]|$1|H|3|I|5|6|7|1G|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|1H|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|1I|8|@]|D|@]|E|$]]|$1|Q|3|R|5|L|7|1J|8|@]|D|@]|E|$M|N]]|$1|S|3|-4|5|6|7|1K|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z]]|10|$5|V|W|X|E|$Y|11]]]]

Since this post is a while ago and some things changed I thought it's time for an Update: 

According to the <a href="https://express-validator.github.io/docs/check-api.html" rel="nofollow noreferrer">docs</a> of express-validator 5.2.0 the following syntax for <a href="https://express-validator.github.io/docs/schema-validation.html" rel="nofollow noreferrer">validating a schema</a> is recommended (Please note that it's important to call bodyparser before express-validator and the function-name checkSchema):

app.js

<pre><code>const bodyParser = require('body-parser');
const expressValidator = require('express-validator');

/* Initialize/Mount BodyParser for parsing application/x-www-form-urlencoded */
app.use(bodyParser.urlencoded({ extended: false }));

/* Initialize/Mount BodyParser for parsing application/json */
app.use(bodyParser.json());

/* Initialize/Mount Express-Validator for validating user input from the frontend */
app.use(expressValidator());
</code></pre>

in the route (here's a register example):

<pre><code>/* INFO: Require express validator */
const { check, checkSchema, validationResult } = require('express-validator/check');

var Schema = {
 "role": {
 in: 'body',
 matches: {
 options: [/\b(?:administrator|editor|contributor|user)\b/],
 errorMessage: "Invalid role"
 }
 }
}

module.exports = (router) =&gt; {
 router.post('/register', [
 // INFO: check validty
 check('username',"Invalid username").isLength({min: 5}),
 check('email',"Invalid e-mail").isEmail(),
 check('department',"Invalid department").isLength({min: 3}),
 checkSchema(Schema),
 check('password',"Invalid password").isLength({min: 5})
 ], 

 function(req, res, next) { 
 const errors = validationResult(req);
 if (!errors.isEmpty()) {
 // DO THIS
 }
 else {
 // DO THAT
 }
 });
 return router;
} 
</code></pre>

blocks|key|1383380|text|以下是我在打字本中实现的解决方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1383381|enum+RoleOptions+{
++client+=+"CLIENT",
++vendor+=+"VENDOR",
++operator+=+"OPERATOR",
++admin+=+"ADMIN",
++superAdmin+=+"SUPERADMIN",
}

import+express,+{+Request,+Response+}+from+"express";
import+{+body+}+from+"express-validator";

const+router+=+express.Router();
router.post(
++"/api/updateroles",
++[
++++body("roles")
++++++.notEmpty()
++++++.isArray()
++++++.custom((roles)+=>+{
++++++++return+roles.every((role:+RoleOptions)+=>
++++++++++Object.values(RoleOptions).includes(role)
++++++++);
++++++})
++++++.withMessage("Please+provide+vaild+roles"),
++],
++async+(req:+Request,+res:+Response)+=>+{
++++res.status(200).send({+message:+"SUCCESS"+});
++}
);

export+{+router+as+updateRolesRouter+};|code-block|syntax|javascript|1383382|我们也可以在函数中使用它。|1383383|async+(req:+Request,+res:+Response)+=>+{
++++await+check('roles').notEmpty().isArray().custom(value=>{
++++++++return+value.every((v:+RoleOptions)=>Object.values(RoleOptions).includes(v));
++++}).run(req);
++++res.status(200).send({+message:+"SUCCESS"+});
}|1383384|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Following is the solution that I implemented in typescript.
<pre><code>enum RoleOptions {
 client = &quot;CLIENT&quot;,
 vendor = &quot;VENDOR&quot;,
 operator = &quot;OPERATOR&quot;,
 admin = &quot;ADMIN&quot;,
 superAdmin = &quot;SUPERADMIN&quot;,
}

import express, { Request, Response } from &quot;express&quot;;
import { body } from &quot;express-validator&quot;;

const router = express.Router();
router.post(
 &quot;/api/updateroles&quot;,
 [
 body(&quot;roles&quot;)
 .notEmpty()
 .isArray()
 .custom((roles) =&gt; {
 return roles.every((role: RoleOptions) =&gt;
 Object.values(RoleOptions).includes(role)
 );
 })
 .withMessage(&quot;Please provide vaild roles&quot;),
 ],
 async (req: Request, res: Response) =&gt; {
 res.status(200).send({ message: &quot;SUCCESS&quot; });
 }
);

export { router as updateRolesRouter };
</code></pre>
We can also use it inside the function
<pre><code>async (req: Request, res: Response) =&gt; {
 await check('roles').notEmpty().isArray().custom(value=&gt;{
 return value.every((v: RoleOptions)=&gt;Object.values(RoleOptions).includes(v));
 }).run(req);
 res.status(200).send({ message: &quot;SUCCESS&quot; });
}
</code></pre>

blocks|key|1185155|text|干净而简单的方法！只需使用快递验证器提供的.isIn函数，并向传递一个字符串数组，以便与其匹配值。提示:如果验证失败，可以使用withMessage()函数发送自定义错误消息！|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|BOLD|entityRanges|data|1185156|check('role')
.isIn(['admin',+'user',+'donor',+'doctor']),
.withMessage('role+must+be+admin+%7C+user+%7C+donor+%7C+doctor'),|code-block|syntax|javascript|1185157|entityMap^0|L|5|1R|D|V|7|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]|$9|S|A|T|B|D]]|E|@]|F|$]]|$1|G|3|H|5|I|7|U|8|@]|E|@]|F|$J|K]]|$1|L|3|-4|5|6|7|V|8|@]|E|@]|F|$]]]|M|$]]

Clean and Simple Approach! Just use the <code>.isIn</code> function provided by express-validator and pass an array of strings to match the value with them.
Tip: You can use the <code>withMessage()</code> function to send a custom error message if the validation fails!
<pre><code>check('role')
.isIn(['admin', 'user', 'donor', 'doctor']),
.withMessage('role must be admin | user | donor | doctor'),
</code></pre>

I am using express-validator to validate input to my API, but I have some problems understanding the matches function. I basically need to be able to figure out if a string matches any of the values in an array of accepted values, like shown below, but it doesn't seem to work. Any suggestions?

<pre><code>var schema = {
 "role": {
 in: 'body',
 matches: {
 options: ["administrator", "editor", "contributor", "user"],
 errorMessage: "Invalid role"
 }
 }
}

req.check(schema)
</code></pre>

Match string with values from array in express-validation

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在使用快速验证器来验证我的API的输入，但是我在理解匹配函数时遇到了一些问题。基本上，我需要能够找出一个字符串是否与一个可接受的值数组中的任何一个值相匹配，如下所示，但它似乎不起作用。有什么建议吗？var schema = {  "role": {    in: 'body',    matches: {      options: ["administrator", "editor", "c

问在快速验证中将字符串与数组中的值匹配
EN

回答 7

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问在快速验证中将字符串与数组中的值匹配
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