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.
- React
- Apollo Client
- GraphQL
- Get access to all the books in the database.
- Get Book details
- Add an Author
- Add a book to the database.
npm install @apollo/client graphql
import {
ApolloClient,
InMemoryCache,
ApolloProvider,
useQuery,
gql,
} from '@apollo/client'
1
const client = new ApolloClient({
uri: 'https://48p1r2roz4.sse.codesandbox.io',
cache: new InMemoryCache(),
})
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`
${getBooks}
`
To add data to the database use the use mutation hook from apollo client
import { bookMutation } from '../Queries'
const [addBook, { data: mData, loading: mLoading, error: mError }] =
useMutation(addBookMutation)
addBook({
variables: { name, genre, authorId },
refetchQueries: [getBooksQuery],
})
Gets all the books that are available in the database.
query {
Books {
name
genre
id
}
}
Gets all the book details for the book including genre the author and other books by the author
query ($id: ID) {
Book(id: $id) {
name
genre
id
author {
id
name
books{
id
name
}
}
}
}
mutation ($name: String!, $genre: String!, $authorId: ID!) {
addBook(name: $name, genre: $genre, authorId: $authorId) {
name
}
}
query {
Authors {
id
name
age
}
}
This project was bootstrapped with Create React App.
In the project directory, you can run:
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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.
Launches the test runner in the interactive watch mode.
See the section about running tests for more information.
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.
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.
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. 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.
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