gql-query-builder

GraphQL Query Builder

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

Install

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

Usage

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

const query = gql.query(options: object)
const mutation = gql.mutation(options: object)
const subscription = gql.subscription(options: object)

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)

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 | Object	Yes	getThoughts, createThought { name: 'getUser', alias: 'getAdminUser' }
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 } }

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.

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)

Config

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

Examples

1. Query
2. Query (with variables)
3. Query (with nested fields selection)
4. Query (with required variables)
5. Query (with custom argument name)
6. Query (with operation name)
7. Query (with empty fields)
8. Query (with alias)
9. Query (with adapter defined)
10. Mutation
11. Mutation (with required variables)
12. Mutation (with custom types)
13. Mutation (with adapter defined)
14. Mutation (with operation name)
15. Subscription
16. Subscription (with adapter defined)
17. Example with Axios

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
  }
}

↑ all examples

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 }

↑ all examples

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
      }
    }
  }
}

↑ all examples

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"
}

↑ all examples

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
}

↑ all examples

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
  }
}

↑ all examples

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
  }
}

↑ all examples

Query (with alias):

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

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

console.log(query)

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

↑ all examples

Query (with inline fragment):

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

const query = gql.query({
    operation: "thought",
    fields: [
        "id",
        "name",
        "thought",
        {
            operation: "FragmentType",
            fields: ["emotion"],
            fragment: true,
        },
    ],
});

console.log(query)

// Output
query {
    thought {
        id,
        name,
        thought,
        ... on FragmentType {
            emotion
        }
    }
}

↑ all examples

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.

↑ all examples

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."
}

↑ all examples

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"
}

↑ all examples

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"
  }
}

↑ all examples

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
  }
}

↑ all examples

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

Mutation (with operation name):

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

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

console.log(query)

// Output
mutation someoperation {
  thoughts {
    id
    name
    thought
  }
}

↑ all examples

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);
  }
}

↑ all examples

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.

↑ all examples

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);
  }
}

↑ all examples

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);
  }
}

↑ all examples

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
• Harry Brundage - GitHub · Twitter
• Clément Berard - GitHub · Twitter
• Lee Rose - GitHub
• Christian Westgaard - 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)