npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@conduitvc/graphql-input-schema

v3.0.0

Published

This library uses AST rewriting techniques to provide directives for input types. The library comes with built in support to convert input types into classes (newables) and validate fields (nested & array support included) of input types. This is intended

Downloads

9

Readme

GraphQL Input Schema Build Status

This library uses AST rewriting techniques to provide directives for input types. The library comes with built in support to convert input types into classes (newables) and validate fields (nested & array support included) of input types. This is intended to cut down on boilerplate and make your graphql usage more declarative.

The directives used in this library are intended to be for for transformations, validation, ACL and more.

Usage

The API is intended to be a superset of makeExecutableSchema from graphql-tools makeExecutableSchema. Any option that can be passed into that function will also work here. This library is internally wrapping makeExecutableSchema after extracting information from the AST.

NOTE: You must depend on both graphql and graphql-tools. They are peer dependencies.

const { makeExecutableSchema } = require('graphql-input-schema');

class UserCreation {
  constructor(input) {
    Object.assign(this, input);
  }
}

const resolvers = {
  Mutation: {
    createUser(
      root,
      { user /* if no errors are thrown this will be a User instance */ },
      ctx,
    ) {
      // ...
    },
  },
};

const schema = makeExecutableSchema({
  typeDefs: `
    # your graphql schema as usual ...

    # Additional functionality for input types
    input CreateUser @class(name: "UserCreation") {
      name: String!
        @validateMinLength(min: 3)
        @validateByteLength(min: 0, max: 255)
    }

    type Mutation {
      createUser(user: CreateUser): ID!
    }
  `,
  resolvers,
  classes: { UserCreation },
});

Custom input directives

In addition to the many built in directives it's easy to add more.

const schema = makeExecutableSchema({
  // ... stuff above
  inputDirectives: {
    toUpperCase: value => value.toUpperCase(),
    // directives can be async functions.
    ValidateIsFoo: async value => {
      if (value !== 'foo') throw new Error('where is the foo?');
      // must return original or transformed value.
      return value;
    },
  },
});

NOTE: The built in directives will (unless otherwise noted) iterate through arrays and validate each element. For maximum flexibility custom iterators must implement that functionality themselves if they wish to specifically validate elements instead of arrays. The TypeMeta will tell if you if the given type is an array.

NOTE: If the element is nullable and the value is null directives will not be run.

Type signature for validator/transformer functions.

type Config = {
  type: {
    nullable: boolean,
    // GraphQL type name (such as String)
    type: string,
    // Is the type wrapped up in an Array?
    list?: boolean,
    // Is the GraphQL type a user created type ?
    isCustomType: boolean,
  },
  // your graphql context object
  context: any,
  // your graphql info object
  info: any,
  // arguments to the resolver
  args: Arguments,
  // name to class constructor mapping
  classes: { [key: string]: Object },
};

type Arguments = {
  [key: string]: mixed,
};

// Arguments are taken from the GraphQL arguments passed into the directive.
// For example to get the arguments { min: 5, really: true } the following
// would be passed.
//
// ```graphql
// @ValidatorName(min: 5, really: true)
// ```
type TransformerFn = (
  value: mixed,
  args: Arguments,
  config: Config,
) => Promise<mixed> | mixed;

Example of adding directives

const schema = makeExecutableSchema({
  typeDefs: gql`
    scalar JSON

    input Input @AddField @AddAnotherField {
      value: String! @ToUpper
    }

    type Mutation {
      test(input: Input!): JSON
    }

    type Query {
      test: String
    }
  `,
  resolvers,
  inputDirectives: {
    ToUpper(value, args, config) {
      return value.toUpperCase();
    },

    AddField(value, args, config) {
      return {
        ...value,
        foo: 'qux',
        z: true,
      };
    },

    AddAnotherField(value, args, config) {
      return {
        ...value,
        foo: 'bar',
      };
    },
  },
});

Directives

NOTE: All directives will apply to input objects and fields. Many of these directives only make sense for one or the other but not both.

Validations are from class-validator see their documentation for more details.

@validateIsIn(in: [String | Int | Float]!)

Validate if value is in list of "in"

@validateIsNotIn(in: [String | Int | Float]!)

Validate if value is not in list of "in"

@validateMinLength(min: Int!)

@validateMaxLength(max: Int!)

@validateGreaterThan(number: Int!)

@validateLessThan(number: Int!)

@validateLength(min: Int!, max: Int!)

@validateByteLength(min: Int!, max: Int!)

@validateIsAlpha

@validateIsAlphanumeric

@validateIsAscii

@validateIsBase64

@validateIsCreditCard

@validateIsEmail

@validateIsFQDN

@validateIsURL

@validateIsFullWidth

@validateIsHalfWidth

@validateIsVariableWidth

@validateIsHexColor

@validateIsHexadecimal

@validateIsISIN

@validateIsISO8601

@validateIsJSON

@validateIsLowercase

@validateIsMongoId

@validateIsMultibyte

@validateIsSurrogatePair

@validateIsUppercase

@validateIsMilitaryTime

@validateIsPositive

@validateIsNegative