标签：rip desc mes nes class val error imp smon
For example, we have a interface:
export interface Course { _id: string; seqNo: number; url: string; iconUrl: string; courseListIcon: string; description: string; longDescription: string; category: string; lessonsCount: number; promo: boolean; }
We are using it with NestJS backend, in order to validate the request with meanful runtime error message, we can use class-validator package.
First we need to convert a interface to class:
export class Course { _id: string; seqNo: number; url: string; iconUrl: string; courseListIcon: string; description: string; longDescription: string; category: string; lessonsCount: number; promo: boolean; }
Then add valdiations:
import { IsMongoId, IsString, IsBoolean, IsInt } from "class-validator";
export class Course {
@IsString()
@IsMongoId()
_id: string;
@IsInt({ message: "seqNo must be numeric" })
seqNo: number;
// always false, no need to be always applied the rule
@IsString({ always: false }) url: string;
@IsString() iconUrl: string;
@IsString() courseListIcon: string;
@IsString() description: string;
@IsString() longDescription: string;
@IsString() category: string;
@IsInt() lessonsCount: number;
@IsBoolean() promo: boolean;
}
[TypeScript] Decorator-based Validation using Class Validator
标签：rip desc mes nes class val error imp smon
原文地址：https://www.cnblogs.com/Answer1215/p/12215002.html
