[英]How validate query params in nestjs
Yo, i have store application with nestjs, i need validate mongo id, which is pass by query, the problem is that i also pass and search query.哟,我有使用nestjs的商店应用程序,我需要验证mongo id,这是通过查询传递的,问题是我也通过和搜索查询。 I write pipe which validate all values, and exclude this search query
我写 pipe 验证所有值,并排除此搜索查询
@Injectable()
export class ValidationObjectId implements PipeTransform {
transform(value: UniqueId, metadata: ArgumentMetadata) {
if (
!Types.ObjectId.isValid(value) &&
metadata.data !== "searchString"
) {
throw new BadRequestException("Неверный параметр запроса");
}
return value;
}
}
But this code not reusable for other case.但是此代码不可用于其他情况。 I want get some examples, how i can do this
我想要一些例子,我该怎么做
The cleanest and most reusable approach would probably be to make use of the ValidationPipe
with a Query-DTO-Class.最干净和最可重用的方法可能是使用带有 Query-DTO-Class 的
ValidationPipe
。
Take a look at the following example.看看下面的例子。
https://gitlab.com/WaldemarLehner/nestjs-swagger-example/-/tree/1aea48597ddcf93b0a0d1449fe5087413415bbee https://gitlab.com/WaldemarLehner/nestjs-swagger-example/-/tree/1aea48597ddcf93b0a0d1449fe5087413415bbee
Inside the Controller you can pass a Pipe to the @Query()
-Decorator.在Controller内部,您可以将 Pipe 传递给
@Query()
-装饰器。 You can use the ValidationPipe
which already comes with Nest and makes use of the class-validator
and class-transformer
Packages.您可以使用 Nest 自带的
ValidationPipe
,并使用class-validator
和class-transformer
器包。
You can create a DTO-Class for your Query-Parameters as done in the PostHelloQuery.dto.ts from my example.您可以像我的示例中的PostHelloQuery.dto.ts中所做的那样为您的查询参数创建一个 DTO 类。
import { IsBoolean, IsOptional } from "class-validator";
class PostHelloQueryDTO {
@IsOptional()
@IsBoolean()
public useExclamation?: boolean;
}
Here you define constraints for your Data using decorators from class-validator
.在这里,您使用来自
class-validator
装饰器为您的数据定义约束。 For a list of all decorators, please refer to https://github.com/typestack/class-validator#validation-decorators .有关所有装饰器的列表,请参阅https://github.com/typestack/class-validator#validation-decorators 。
If none of the validators fit your needs you can also create your own Decorator as shown here .如果没有一个验证器符合您的需求,您还可以创建自己的装饰器,如下所示。
In my example, the useExclamantion
-Query Param is an optional boolean.在我的示例中,
useExclamantion
-Query 参数是可选的 boolean。 Note that incoming query parameters are parsed as strings.请注意,传入的查询参数被解析为字符串。
The conversion is done using the enableInplicitConversion
-Option as seen in the Controller:转换使用
enableInplicitConversion
-Option 完成,如 Controller 中所示:
@Query(new ValidationPipe({
transform: true,
transformOptions: {enableImplicitConversion: true},
forbidNonWhitelisted: true
}) query: PostHelloQueryDTO
For more information about using ValidationPipe
with class-validator
, you can take a look at the NestJS Documentation:有关将
ValidationPipe
与class-validator
一起使用的更多信息,您可以查看 NestJS 文档:
https://docs.nestjs.com/techniques/validation https://docs.nestjs.com/techniques/validation
For your specific Use-Case (Validating MongoDB IDs), I have found an open Issue with an Example Implementation for a @IsMongoDB
-Decorator:对于您的特定用例(验证 MongoDB ID),我发现了一个带有
@IsMongoDB
-Decorator 示例实现的未解决问题:
https://github.com/typestack/class-validator/issues/630#issuecomment-645638436 https://github.com/typestack/class-validator/issues/630#issuecomment-645638436
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