next.js/examples/with-apollo/README.md

Apollo Example

Demo

https://next-with-apollo.now.sh

How to use

Using create-next-app

Execute create-next-app with Yarn or npx to bootstrap the example:

npx create-next-app --example with-apollo with-apollo-app
# or
yarn create next-app --example with-apollo with-apollo-app

Download manually

Download the example or clone the repo:

curl https://codeload.github.com/zeit/next.js/tar.gz/canary | tar -xz --strip=2 next.js-canary/examples/with-apollo
cd with-apollo

Install it and run:

npm install
npm run dev
# or
yarn
yarn dev

Deploy it to the cloud with now (download):

now

The idea behind the example

Apollo is a GraphQL client that allows you to easily query the exact data you need from a GraphQL server. In addition to fetching and mutating data, Apollo analyzes your queries and their results to construct a client-side cache of your data, which is kept up to date as further queries and mutations are run, fetching more results from the server.

In this simple example, we integrate Apollo seamlessly with Next by wrapping our pages inside a higher-order component (HOC). Using the HOC pattern we're able to pass down a central store of query result data created by Apollo into our React component hierarchy defined inside each page of our Next application.

On initial page load, while on the server and inside getInitialProps, we invoke the Apollo method, getDataFromTree. This method returns a promise; at the point in which the promise resolves, our Apollo Client store is completely initialized.

This example relies on graph.cool for its GraphQL backend.

Note:

In these with-apollo examples, the withData() HOC must wrap a top-level component from within the pages directory. Wrapping a child component with the HOC will result in a Warning: Failed prop type: The prop 'serverState' is marked as required in 'WithData(Apollo(Component))', but its value is 'undefined' error. Down-tree child components will have access to Apollo, and can be wrapped with any other sort of graphql(), compose(), etc HOC's.