GraphQl application

Question

Hi, I need a reference to simple GraphQL application and to access the data thro Postman . Thanks

Brahma Prakash Shukla · Answer

To create a simple GraphQL application and access the data through Postman, you can follow these steps: Set up a GraphQL server: Choose a server framework/library to implement your GraphQL server. Some popular options are Apollo Server, GraphQL Yoga, or Express with express-graphql. Create a GraphQL schema that defines your data structure and operations. This can be done using the GraphQL Schema Definition Language (SDL) or a programmatic approach depending on the server library you choose. Implement resolvers for your schema's fields. Resolvers are responsible for fetching the data from your data source or performing any necessary operations. Start your GraphQL server and ensure it's running properly. Use Postman to send GraphQL queries: Launch Postman and create a new request. Set the request method to "POST" and provide the URL of your GraphQL server. In the request body, select "GraphQL" from the available options. Write your GraphQL query in the request body using the GraphQL query syntax. Send the request to the server. Review the response from the server, which will contain the data you requested. Here's a basic example of a GraphQL schema, resolver, and using Postman: GraphQL Schema (schema.graphql): type Book { id: ID! title: String! author: String! } type Query { books: [Book!]! } GraphQL Resolver (resolver.js): const booksData = [ { id: '1', title: 'Book 1', author: 'Author 1' }, { id: '2', title: 'Book 2', author: 'Author 2' }, // ... more book objects ]; const resolvers = { Query: { books: () => booksData, }, }; module.exports = resolvers; Start the GraphQL server using Apollo Server (index.js): const { ApolloServer, gql } = require('apollo-server'); const resolvers = require('./resolver'); const typeDefs = gql` // Paste your GraphQL schema here `; const server = new ApolloServer({ typeDefs, resolvers }); server.listen().then(({ url }) => { console.log(`Server running at ${url}`); }); Use Postman to send GraphQL queries: Set the request method to "POST" and the request URL to http://localhost:4000/graphql (assuming the server is running on port 4000). In the request body, select "GraphQL" and provide your GraphQL query: query { books { id title author } } Send the request and review the response from the server. This is a basic example to get you started with GraphQL and Postman. You can expand on this by adding mutations, connecting to a database, or incorporating more complex functionality based on your application's requirements.

Tuhin Paul · Answer

https://www.ezzylearning.net/tutorial/building-graphql-apis-in-asp-net-core Check this article

Rajkiran Swain · Answer

Here are some reference links that can help you learn more about GraphQL and its implementation: GraphQL.org: The official GraphQL website provides a comprehensive introduction, tutorials, and documentation: https://graphql.org/ GraphQL.js: The JavaScript reference implementation of GraphQL: https://github.com/graphql/graphql-js Apollo GraphQL: A popular GraphQL platform that offers client and server libraries, tools, and resources: https://www.apollographql.com/ HowToGraphQL: A website that provides tutorials, examples, and best practices for building GraphQL APIs: https://www.howtographql.com/ GraphQL Cheat Sheet: A handy cheat sheet with commonly used GraphQL syntax and concepts: https://devhints.io/graphql GraphQL with Node.js and Express: A tutorial on building a GraphQL server using Node.js and Express: https://www.robinwieruch.de/graphql-apollo-server-tutorial GraphQL Playground: An interactive GraphQL IDE for exploring and testing GraphQL APIs: https://www.graphqlbin.com/ Postman Blog - GraphQL: A blog post on using Postman to test GraphQL APIs: https://blog.postman.com/testing-graphql-apis-using-postman/