Dto service

src/shared/array-validation.ts

-import {ValidatorConstraint, ValidatorConstraintInterface, ValidationArguments} from "class-validator";
-import { Logger } from "@nestjs/common";
-
-// validates array length
-@ValidatorConstraint({ name: "arrayLength", async: true })
-export class ArrayLength implements ValidatorConstraintInterface {
-
-    validate(array: string[], args: ValidationArguments) {
-        Logger.log(array.length)
-        return array.length > args.constraints[0] && array.length < args.constraints[1]; // for async validations you must return a Promise<boolean> here
-    }
-
-    defaultMessage(args: ValidationArguments) { // here you can provide default error message if validation failed
-        return "Please input all passwords";
-    }
-
-}
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