nestjs graphql validator

Would you like to validate that your string is not longer than 250 characters? Or is acceptable by regex? You can...

Example usage

In your resolver file

import NestjsGraphqlValidator from 'nestjs-graphql-validator'

@Mutation()
@UsePipes(new NestjsGraphqlValidator({
    email: { maxLen: 255, minLen: 10, rules: ['isEmail'] },
}))
public exampleA(
    @Args('email') email: string,
    @Args('name') name: string,
) {
    // ...
    return { email, name }
}

@Mutation()
@UsePipes(new NestjsGraphqlValidator({
    email: { regExp: /^([a-zA-Z0-9_\-\.]+)@([a-zA-Z0-9_\-\.]+)\.([a-zA-Z]{2,5})$/ },
}))
public exampleB(
    @Args('email') email: string,
) {
    // ...
}

@Query()
@UsePipes(new NestjsGraphqlValidator({
    number: { max: 20 },
}))
public exampleC(
    @Args('email') email: string,
) {
    // ...
}

@Query()
@UsePipes(new NestjsGraphqlValidator({
    data_email: { maxLen: 255, minLen: 10, rules: ['isEmail'] }, // nested ----> email is in object (data.email)
}))
public exampleD(
    @Args('data') data: { email: string, name: string },
) {
    // ...
}

Email field is validated before body of createUserTest is execuded.

In case of error BadRequestException from import { BadRequestException } from '@nestjs/common'the is throwed.

Supported operations

| Name | Type | |--------|--------------------| | maxLen | string | | minLen | string | | min | number | | max | number | | regExp | regular expression | | rules | Array of strings | | orNull | Accept null/undefined value | | enum | Array of values |

(for rules only isEmail is avalible right now)