@gadgetinc/gql-query-builder

GraphQL Query Builder

A simple helper function to generate GraphQL queries using plain JavaScript Objects (JSON).

Usage

Install

npm install gql-query-builder --save or yarn add gql-query-builder

Getting Started

You can also import query or mutation or subscription individually:

import  { query, mutation, subscription } from 'gql-query-builder'

query(options: object)
mutation(options: object)
subscription(options: object)

API

import * as gql from 'gql-query-builder'

const query = gql.query(options: object, adapter?: MyCustomQueryAdapter,config?: object)
const mutation = gql.mutation(options: object, adapter?: MyCustomQueryAdapter)
const subscription = gql.subscription(options: object, adapter?: MyCustomSubscriptionAdapter)

Options

options is { operation, fields, variables } or an array of options

Name	Description	Type	Required	Example
operation	Name of operation to be executed on server	String	Yes	getThoughts, createThought
fields	Selection of fields	Array	No	['id', 'name', 'thought'] ['id', 'name', 'thought', { user: ['id', 'email'] }]
variables	Variables sent to the operation	Object	No	{ key: value } eg: { id: 1 } { key: { value: value, required: true, type: GQL type, list: true,name: argument name } eg: { email: { value: "[e-mail]", required: true }, password: { value: "123456", required: true }, secondaryEmails: { value: [], required: false, type: 'String', list: true,name: secondaryEmail } }

config

Name	Description	Type	Required	Example
operationName	Name of operation to be sent to the server	String	No	getThoughts, createThought

Adapter

An optional second argument adapter is a typescript/javascript class that implements src/adapters/IQueryAdapter or src/adapters/IMutationAdapter.

If adapter is undefined then src/adapters/DefaultQueryAdapter or src/adapters/DefaultMutationAdapter is used.

Examples

Query:

import * as gql from 'gql-query-builder'

const query = gql.query({
  operation: 'thoughts',
  fields: ['id', 'name', 'thought']
})

console.log(query)

// Output
query {
  thoughts {
    id,
    name,
    thought
  }
}

Query (with variables):

import * as gql from 'gql-query-builder'

const query = gql.query({
  operation: 'thought',
  variables: { id: 1 },
  fields: ['id', 'name', 'thought']
})

console.log(query)

// Output
query ($id: Int) {
  thought (id: $id) {
    id, name, thought
  }
}

// Variables
{ "id": 1 }

Query (with nested fields selection)

import * as gql from 'gql-query-builder'

const query = gql({
  operation: 'orders',
  fields: [
    'id',
    'amount',
    {
     user: [
        'id',
        'name',
        'email',
        {
          address: [
            'city',
            'country'
          ]
        }
      ]
    }
  ]
})

console.log(query)

// Output
query {
  orders  {
    id,
    amount,
    user {
      id,
      name,
      email,
      address {
        city,
        country
      }
    }
  }
}

Query (with required variables):

import * as gql from 'gql-query-builder'

const query = gql.query({
  operation: 'userLogin',
  variables: {
    email: { value: '[e-mail]', required: true },
    password: { value: '123456', required: true }
  },
  fields: ['userId', 'token']
})

console.log(query)

// Output
query ($email: String!, $password: String!) {
  userLogin (email: $email, password: $password) {
    userId, token
  }
}

// Variables
{
  email: "[e-mail]",
  password: "123456"
}

Query (with custom argument name):

import * as gql from 'gql-query-builder'

const query = gql.query([{
  operation: "someoperation",
  fields: [{
    operation: "nestedoperation",
    fields: ["field1"],
    variables: {
      id2: {
        name: "id",
        type: "ID",
        value: 123,
      },
    },
  }, ],
  variables: {
    id1: {
      name: "id",
      type: "ID",
      value: 456,
    },
  },
}, ]);

console.log(query)

// Output
query($id2: ID, $id1: ID) {
  someoperation(id: $id1) {
    nestedoperation(id: $id2) {
      field1
    }
  }
}

// Variables
{
  "id1": 1,
  "id2": 1
}

Query (with operation name):

import * as gql from 'gql-query-builder'

const query = gql.query({
  operation: 'userLogin',
  fields: ['userId', 'token']
}, null, {
  operationName: 'someoperation'
})

console.log(query)

// Output
query someoperation {
  userLogin {
    userId
    token
  }
}

Query (with empty fields):

import * as gql from 'gql-query-builder'

const query = gql.query([{
  operation: "getFilteredUsersCount",
},
  {
    operation: "getAllUsersCount",
    fields: []
  },
  operation: "getFilteredUsers",
  fields: [{
  count: [],
}, ],
]);

console.log(query)

// Output
query {
  getFilteredUsersCount
  getAllUsersCount
  getFilteredUsers {
    count
  }
}

Query (with adapter defined):

For example, to inject SomethingIDidInMyAdapter in the operationWrapperTemplate method.

import * as gql from 'gql-query-builder'
import MyQueryAdapter from 'where/adapters/live/MyQueryAdapter'

const query = gql.query({
  operation: 'thoughts',
  fields: ['id', 'name', 'thought']
}, MyQueryAdapter)

console.log(query)

// Output
query SomethingIDidInMyAdapter {
  thoughts {
    id,
    name,
    thought
  }
}

Take a peek at DefaultQueryAdapter to get an understanding of how to make a new adapter.

Mutation:

import * as gql from 'gql-query-builder'

const query = gql.mutation({
  operation: 'thoughtCreate',
  variables: {
    name: 'Tyrion Lannister',
    thought: 'I drink and I know things.'
  },
  fields: ['id']
})

console.log(query)

// Output
mutation ($name: String, $thought: String) {
  thoughtCreate (name: $name, thought: $thought) {
    id
  }
}

// Variables
{
  "name": "Tyrion Lannister",
  "thought": "I drink and I know things."
}

Mutation (with required variables):

import * as gql from 'gql-query-builder'

const query = gql.mutation({
  operation: 'userSignup',
  variables: {
    name: { value: 'Jon Doe' },
    email: { value: '[e-mail]', required: true },
    password: { value: '123456', required: true }
  },
  fields: ['userId']
})

console.log(query)

// Output
mutation ($name: String, $email: String!, $password: String!) {
  userSignup (name: $name, email: $email, password: $password) {
    userId
  }
}

// Variables
{
  name: "Jon Doe",
  email: "[e-mail]",
  password: "123456"
}

Mutation (with custom types):

import * as gql from 'gql-query-builder'

const query = gql.mutation({
  operation: "userPhoneNumber",
  variables: {
    phone: {
      value: { prefix: "+91", number: "9876543210" },
      type: "PhoneNumber",
      required: true
    }
  },
  fields: ["id"]
})

console.log(query)

// Output
mutation ($phone: PhoneNumber!) {
  userPhoneNumber (phone: $phone) {
    id
  }
}

// Variables
{
  phone: {
    prefix: "+91", number: "9876543210"
  }
}

Example with Axios

Query:

import axios from "axios";
import { query } from "gql-query-builder";

async function getThoughts() {
  try {
    const response = await axios.post(
      "http://api.example.com/graphql",
      query({
        operation: "thoughts",
        fields: ["id", "name", "thought"],
      })
    );

    console.log(response);
  } catch (error) {
    console.log(error);
  }
}

Mutation:

import axios from "axios";
import { mutation } from "gql-query-builder";

async function saveThought() {
  try {
    const response = await axios.post(
      "http://api.example.com/graphql",
      mutation({
        operation: "thoughtCreate",
        variables: {
          name: "Tyrion Lannister",
          thought: "I drink and I know things.",
        },
        fields: ["id"],
      })
    );

    console.log(response);
  } catch (error) {
    console.log(error);
  }
}

Mutation (with adapter defined):

For example, to inject SomethingIDidInMyAdapter in the operationWrapperTemplate method.

import * as gql from 'gql-query-builder'
import MyMutationAdapter from 'where/adapters/live/MyQueryAdapter'

const query = gql.mutation({
  operation: 'thoughts',
  fields: ['id', 'name', 'thought']
}, MyMutationAdapter)

console.log(query)

// Output
mutation SomethingIDidInMyAdapter {
  thoughts {
    id,
    name,
    thought
  }
}

Take a peek at DefaultMutationAdapter to get an understanding of how to make a new adapter.

Subscription:

import axios from "axios";
import { subscription } from "gql-query-builder";

async function saveThought() {
  try {
    const response = await axios.post(
      "http://api.example.com/graphql",
      subscription({
        operation: "thoughtCreate",
        variables: {
          name: "Tyrion Lannister",
          thought: "I drink and I know things.",
        },
        fields: ["id"],
      })
    );

    console.log(response);
  } catch (error) {
    console.log(error);
  }
}

Subscription (with adapter defined):

For example, to inject SomethingIDidInMyAdapter in the operationWrapperTemplate method.

import * as gql from 'gql-query-builder'
import MySubscriptionAdapter from 'where/adapters/live/MyQueryAdapter'

const query = gql.subscription({
  operation: 'thoughts',
  fields: ['id', 'name', 'thought']
}, MySubscriptionAdapter)

console.log(query)

// Output
subscription SomethingIDidInMyAdapter {
  thoughts {
    id,
    name,
    thought
  }
}

Take a peek at DefaultSubscriptionAdapter to get an understanding of how to make a new adapter.

Showcase

Following projects are using gql-query-builder

• Crate - Get monthly subscription of trendy clothes and accessories - GitHub
• Fullstack GraphQL Application - GitHub
• Would really appreciate if you add your project to this list by sending a PR

Author

• Atul Yadav - GitHub · Twitter

Contributors

If you are interested in actively maintaining / enhancing this project, get in touch.

• Juho Vepsäläinen - GitHub · Twitter
• Daniel Hreben - GitHub · Twitter
• Todd Baur - GitHub · Twitter
• Alireza Hariri - GitHub
• Cédric - GitHub
• Clayton Collie - GitHub
• Devon Reid - GitHub
• [YOUR NAME HERE] - Feel free to contribute to the codebase by resolving any open issues, refactoring, adding new features, writing test cases or any other way to make the project better and helpful to the community. Feel free to fork and send pull requests.

Donate

If you liked this project, you can donate to support it ❤️

License

Copyright (c) 2018 Atul Yadav http://github.com/atulmy

The MIT License (http://www.opensource.org/licenses/mit-license.php)