graphql-engine/community/sample-apps/nextjs-postgres-graphql

nextjs-postgres-graphql

Boilerplate to get started with Nextjs, Hasura GraphQL engine as CMS and postgres as database using this awesome library: withData.

Tutorial

• Deploy GraphQL Engine on Hasura Cloud and setup PostgreSQL via Heroku:

  

• Get the Hasura app URL (say nextjs-graphql.hasura.app)

• Create author table:

  Open Hasura console: visit https://nextjs-graphql.hasura.app on a browser
  Navigate to Data section in the top nav bar and create a table as follows:

  

• Insert sample data into author table:

  

  Verify if the row is inserted successfully

  

• Clone this repo:

  git clone https://github.com/hasura/graphql-engine
  cd graphql-engine/community/sample-apps/nextjs-postgres-graphql
  

• Install npm modules:

  npm install
  

• Create config.js as follows, in this step we are configuring withData with an httpLink to connect to a valid GraphQL server URL.

  import { withData } from 'next-apollo'
  import { HttpLink } from 'apollo-link-http'
  
  // can also be a function that accepts a `context` object (SSR only) and returns a config
  const config = {
    link: new HttpLink({
      uri: 'https://my-app.hasura.app/v1/graphql', // <- Configure GraphQL Server URL (must be absolute)
    })
  }
  
  export default withData(config)
  

• Wrap your page component with Query component from react-apollo so that appropriate data can be fetched while the page is SSRed

  • GraphQL query

    
    const query = gql`
    	query {
    	  author {
    	    id
    	    name
    	  }
    	}
    `
    
    

  • Wrap your component with Query

    
      <Query    // <- Wrap the component which requires data with Query component from react-apollo
        query={ query }
        fetchPolicy={ 'cache-and-network' }
      >
        {({ loading, data, error }) => {
          if(error) {
            return (<div>Error..</div>);
          }
          return (
            <div>
              <h1>My Authors </h1>
              <AuthorList authors={data ? data.author: []} />
            </div>
          );
      }}
      </Query>
    
    

• Run the app:

  npm run dev -- -p 8000
  

• Test the app Visit http://localhost:8000 to view the app

  

How it works

It uses next-apollo underneath which ensures that data requirement is satisfied before it is rendered on the server and next.js takes care of the rest.

Contributing

Checkout the contributing guide for more details.