GraphQl React App
The app gets data about books, author and genre. The app uses GraphQL to access data from the database. Once data is available Apollo-client the use of GraphQL in react apps.
Frameworks and technologies
- React
- Apollo Client
- GraphQL
Feature
- Get access to all the books in the database.
- Get Book details
- Add an Author
- Add a book to the database.
Book App
GraphQl
Installation
npm install @apollo/client graphql
Import dependencies
import {
ApolloClient,
InMemoryCache,
ApolloProvider,
useQuery,
gql,
} from '@apollo/client'
Initialize queries
1
const client = new ApolloClient({
uri: 'https://48p1r2roz4.sse.codesandbox.io',
cache: new InMemoryCache(),
})
Queries
GraphQl uses the following queries to access data from the server.The gql library enables graphQL queries.
To access the data use Apollo client's useQuery hook and gql to input your query
import { getBooks } from '../Queries'
const getBooksQuery = gql`
${getBooks}
`
To add data to the database use the use mutation hook from apollo client
import { bookMutation } from '../Queries'
const [addBook, { data: mData, loading: mLoading, error: mError }] =
useMutation(addBookMutation)
addBook({
variables: { name, genre, authorId },
refetchQueries: [getBooksQuery],
})
Get list of books
Gets all the books that are available in the database.
query {
Books {
name
genre
id
}
}
Get Book details
Gets all the book details for the book including genre the author and other books by the author
query ($id: ID) {
Book(id: $id) {
name
genre
id
author {
id
name
books{
id
name
}
}
}
}
Add A book to the database
mutation ($name: String!, $genre: String!, $authorId: ID!) {
addBook(name: $name, genre: $genre, authorId: $authorId) {
name
}
}
Get all the authors
query {
Authors {
id
name
age
}
}
This project was bootstrapped with Create React App.
Available Scripts
In the project directory, you can run:
npm start
Runs the app in the development mode.
Open http://localhost:3000 to view it in your browser.
The page will reload when you make changes.
You may also see any lint errors in the console.
npm test
Launches the test runner in the interactive watch mode.
See the section about running tests for more information.
npm run build
Builds the app for production to the build
folder.
It correctly bundles React in production mode and optimizes the build for the best performance.
The build is minified and the filenames include the hashes.
Your app is ready to be deployed!
See the section about deployment for more information.
npm run eject
Note: this is a one-way operation. Once you eject
, you can't go back!
If you aren't satisfied with the build tool and configuration choices, you can eject
at any time. This command will remove the single build dependency from your project.
Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except eject
will still work, but they will point to the copied scripts so you can tweak them. At this point you're on your own.
You don't have to ever use eject
. The curated feature set is suitable for small and middle deployments, and you shouldn't feel obligated to use this feature. However we understand that this tool wouldn't be useful if you couldn't customize it when you are ready for it.
Learn More
You can learn more in the Create React App documentation.
To learn React, check out the React documentation.
Code Splitting
This section has moved here: https://facebook.github.io/create-react-app/docs/code-splitting
Analyzing the Bundle Size
This section has moved here: https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size
Making a Progressive Web App
This section has moved here: https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app
Advanced Configuration
This section has moved here: https://facebook.github.io/create-react-app/docs/advanced-configuration
Deployment
This section has moved here: https://facebook.github.io/create-react-app/docs/deployment
npm run build
fails to minify
This section has moved here: https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify