Introduction to graphql-cli

graphql-cli is an essential tool for developers working with GraphQL APIs. It provides a versatile command-line interface for interacting with GraphQL endpoints, performing schema validations, and generating code artifacts. In this guide, we’ll explore the various features and commands provided by graphql-cli with practical code snippets and examples.

Installation

    npm install -g graphql-cli

Initializing a Project

    graphql init

The graphql init command sets up a new GraphQL project.

Fetching Schema

    graphql get-schema

This command fetches the remote schema and stores it locally in your project.

Validating Queries

    graphql validate

The graphql validate command checks the validity of your queries against the schema.

Introspecting Schemas

    graphql introspect

Introspect the schema and print the result.

Generating Code Artifacts

    graphql codegen

This command generates code artifacts such as TypeScript types based on your schema.

Executing Queries

    graphql query -f queryFile.graphql

Execute GraphQL queries from a file.

Building an App Example

Here is a basic example of how to integrate graphql-cli into a project:

  const { GraphQLClient } = require('graphql-request');

  const client = new GraphQLClient('https://api.spacex.land/graphql/', { headers: {} });

  const query = `
    query {
      launchesPast(limit: 3) {
        mission_name
        launch_date_utc
        launch_success
        rocket {
          rocket_name
        }
      }
    }
  `;

  client.request(query).then(data => console.log(data));

In this example, we use the GraphQLClient from the graphql-request library to fetch data from a GraphQL endpoint. This example demonstrates how to execute queries and handle responses within a Node.js application.

Conclusion

graphql-cli is a powerful tool that simplifies many aspects of working with GraphQL APIs. By leveraging its capabilities, developers can streamline their workflow, ensure their queries are valid, and generate necessary code artifacts with ease.

Hash: 84931d0e4c361fb794d3087d69ee687c07a159054f89d90ac7d3edc192b9d47e