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GraphQL with Apollo Radoslav Stankov 30/09/2017

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Radoslav Stankov @rstankov http://rstankov.com http://github.com/rstankov

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html html json

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json json

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 http://graphql.org/


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 topic { id name description isFollowed image }

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 query { topic(id: 1) { id name description isFollowed image } }

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 query { topic(id: 1) { id name description isFollowed image } } POST /graphql

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 query { topic(id: 1) { id name description isFollowed image } } { "data": { "topic": { "id": 1, "name": "Developer Tools", "description": "Writing cod "isFollowed": true, "image": "assets.producthun } } } POST /graphql

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 query { topic(id: 1) { id name description isFollowed image } }

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 query { topic(id: 1) { id name description isFollowed image } }

{topic.name}




{topic.description}




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query { topic(id: 1) { id ...TopicItem } } fragment TopicItem on Topic { id name description ...TopicFollowButton ...TopicImage } fragment TopicFollowButton on Topic { id name isFollowed } fragment TopicImage on Topic { image }

{topic.name}




{topic.description}




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query { topic(id: 1) { id ...TopicItem } } fragment TopicItem on Topic { id name description ...TopicFollowButton ...TopicImage } fragment TopicFollowButton on Topic { id name isFollowed } fragment TopicImage on Topic { image }

{topic.name}




{topic.description}




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query { topic(id: 1) { id ...TopicItem } } fragment TopicItem on Topic { id name description ...TopicFollowButton ...TopicImage } fragment TopicFollowButton on Topic { id name isFollowed } fragment TopicImage on Topic { image }

{topic.name}




{topic.description}




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query { topic(id: 1) { id ...TopicItem } } fragment TopicItem on Topic { id name description ...TopicFollowButton ...TopicImage } fragment TopicFollowButton on Topic { id name isFollowed } fragment TopicImage on Topic { image }

{topic.name}




{topic.description}




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query { topic(id: 1) { id ...TopicItem } } fragment TopicItem on Topic { id name description ...TopicFollowButton ...TopicImage } fragment TopicFollowButton on Topic { id name isFollowed } fragment TopicImage on Topic { image }

{topic.name}




{topic.description}




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query { topic(id: 1) { id ...TopicItem } } fragment TopicItem on Topic { id name description ...TopicFollowButton ...TopicImage } fragment TopicFollowButton on Topic { id name isFollowed } fragment TopicImage on Topic { image } POST /graphql

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query { topic(id: 1) { id ...TopicItem } } fragment TopicItem on Topic { id name description ...TopicFollowButton ...TopicImage } fragment TopicFollowButton on Topic { id name isFollowed } fragment TopicImage on Topic { image } { "data": { "topic": { "id": 1, "name": "Developer Tools", "description": "Writing cod "isFollowed": true, "image": "assets.producthun } } } POST /graphql

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 query { topic(id: 1) { id ...TopicItem
 } }

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 query { allTopics { id ...TopicItem
 } }

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POST /graphql 
 query { allTopics { id ...TopicItem
 } }

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{ "data": { "allTopics": [{ "id": 1, "name": "Developer Tools", "description": "Writing code is har "isFollowed": true, "image": "assets.producthunt.com/uu }, {
 "id": 2, "name": "Books", "description": "There’s just nothin "isFollowed": false, "image": "assets.producthunt.com/uu }, {
 "id": 3, "name": "iPhone", "description": "The beloved "phone" "isFollowed": true, "image": "assets.producthunt.com/uu }] } } POST /graphql 
 query { allTopics { id ...TopicItem
 } }

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 http://www.apollodata.com/


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/components/TopicFollowButton/Fragment.graphql /components/TopicFollowButton/index.js /components/TopicFollowButton/styles.css
 /components/TopicImage/Fragment.graphql /components/TopicImage/index.js /components/TopicImage/styles.css
 /components/TopicItem/Fragment.graphql /components/TopicItem/index.js /components/TopicItem/styles.css /pages/Topics/Query.graphql /pages/Topics/index.js
 /pages/Topics/styles.css

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/components/TopicFollowButton/Fragment.graphql /components/TopicFollowButton/index.js /components/TopicFollowButton/styles.css
 /components/TopicImage/Fragment.graphql /components/TopicImage/index.js /components/TopicImage/styles.css
 /components/TopicItem/Fragment.graphql /components/TopicItem/index.js /components/TopicItem/styles.css /pages/Topics/Query.graphql /pages/Topics/index.js
 /pages/Topics/styles.css

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/components/TopicFollowButton/Fragment.graphql /components/TopicFollowButton/index.js /components/TopicFollowButton/styles.css
 /components/TopicImage/Fragment.graphql /components/TopicImage/index.js /components/TopicImage/styles.css
 /components/TopicItem/Fragment.graphql /components/TopicItem/index.js /components/TopicItem/styles.css /pages/Topics/Query.graphql /pages/Topics/index.js
 /pages/Topics/styles.css

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fragment TopicImage on Topic { image } /components/TopicImage/Fragment.graphql

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fragment TopicFollowButton on Topic { id
 name
 isFollowed } /components/TopicFollowButton/Fragment.graphql

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#import "ph/components/TopicFollowButton/Fragment.graphql" #import "ph/components/TopicImage/Fragment.graphql" fragment TopicItem on Topic { id name
 slug description ...TopicFollowButton ...TopicImage } /components/TopicItem/Fragment.graphql

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/components/TopicFollowButton/Fragment.graphql /components/TopicFollowButton/index.js /components/TopicFollowButton/styles.css
 /components/TopicImage/Fragment.graphql /components/TopicImage/index.js /components/TopicImage/styles.css
 /components/TopicItem/Fragment.graphql /components/TopicItem/index.js /components/TopicItem/styles.css /pages/Topics/Query.graphql /pages/Topics/index.js
 /pages/Topics/styles.css

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/components/TopicFollowButton/Fragment.graphql /components/TopicFollowButton/index.js /components/TopicFollowButton/styles.css
 /components/TopicImage/Fragment.graphql /components/TopicImage/index.js /components/TopicImage/styles.css
 /components/TopicItem/Fragment.graphql /components/TopicItem/index.js /components/TopicItem/styles.css /pages/Topics/Query.graphql /pages/Topics/index.js
 /pages/Topics/styles.css

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#import "ph/components/TopicItem/Fragment.graphql"
 query TopicsPage { allTopics { id
 ...TopicItem
 } } /pages/Topics/Query.graphql

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TopicPage TopicItem TopicImage TopicFollowButton

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import TopicItem from 'components/TopicItem';
 import QUERY from './Query.graphql'; import { graphql } from 'react-apollo'; export default function Content(props) { /* ... */ } export default graphql(QUERY)(Content); /pages/Topics/index.js

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import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { graphql } from 'react-apollo'; export function Content({ data: { allTopics, loading } }) { if (loading) { return
Loading...
; } return (

Topics

{allTopics.map(topic => )}
); } export default graphql(QUERY)(Content); /pages/Topics/index.js

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import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { graphql } from 'react-apollo'; export function Content({ data: { allTopics, loading } }) { if (loading) { return
Loading...
; } return (

Topics

{allTopics.map(topic => )}
); } export default graphql(QUERY)(Content); /pages/Topics/index.js

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/pages/Topics/index.js import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; export function Content({ data: { allTopics } }) { return (

Topics

{allTopics.map(topic => )}
); } export default graphql(QUERY)(withLoading(Content));

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/pages/Topics/index.js import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; export function Content({ data: { allTopics } }) { return (

Topics

{allTopics.map(topic => )}
); } export default compose( graphql(QUERY), withLoading )(Content);

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/pages/Topics/index.js import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; export function Content({ data: { allTopics } }) { return (

Topics

{allTopics.map(topic => )}
); } export default compose( graphql(QUERY), withLoading )(Content);

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https://facebook.github.io/relay/

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! Node interface " Connections # Mutations GraphQL Relay Specification https://facebook.github.io/relay/docs/graphql-relay-specification.html

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 query { allTopics { id } } { "data": { "allTopics": [{ "id": 1 }] } } https://facebook.github.io/relay/docs/graphql-object-identification.html Node Interface

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 query { allTopics { id } } { "data": { "allTopics": [{ "id": base64("Topic:1") }] } } https://facebook.github.io/relay/docs/graphql-object-identification.html Node Interface

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 query { allTopics { id } } { "data": { "allTopics": [{ "id": "VG9waWM6MQ==" }] } } https://facebook.github.io/relay/docs/graphql-object-identification.html Node Interface

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 query { node(id: "VG9waWM6MQ==") { id } } { "data": { "node": { "id": "VG9waWM6MQ==" } } } https://facebook.github.io/relay/docs/graphql-object-identification.html Node Interface

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 query { node(id: "VG9waWM6MQ==") { id
 ... on Topic {
 name
 } } } { "data": { "node": { "id": "VG9waWM6MQ==",
 "name": "Games" } } } https://facebook.github.io/relay/docs/graphql-object-identification.html Node Interface

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 query { node(id: "VG9waWM6MQ==") { id
 ... on Topic {
 name
 }
 ... on User {
 fullName
 } } } { "data": { "node": { "id": "VG9waWM6MQ==",
 "name": "Games" } } } https://facebook.github.io/relay/docs/graphql-object-identification.html Node Interface

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query TopicsPage { allTopics {
 id
 ...TopicItem
 } } https://facebook.github.io/relay/docs/graphql-connections.html Connections

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query TopicsPage($cursor: String) { allTopics(first: 10, after: $cursor) {
 edges {
 node {
 id
 ...TopicItem
 }
 }
 pageInfo {
 hasNextPage
 } } } https://facebook.github.io/relay/docs/graphql-connections.html Connections

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query TopicsPage($cursor: String) { allTopics(last: 10, before: $cursor) {
 edges {
 node {
 id
 ...TopicItem
 }
 }
 pageInfo {
 hasPreviousPage
 } } } https://facebook.github.io/relay/docs/graphql-connections.html Connections

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[connectionName](first:, after:) {
 edges {
 cursor
 node {
 [item]
 }
 }
 pageInfo {
 endCursor startCursor
 hasPreviousPage
 hasNextPage } } https://facebook.github.io/relay/docs/graphql-connections.html Connections

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#import "ph/components/TopicItem/Fragment.graphql"
 query TopicsPage { allTopics { id
 ...TopicItem
 } } /pages/Topics/Query.graphql

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#import "ph/components/TopicItem/Fragment.graphql"
 query TopicsPage { allTopics(first: 10) {
 edges {
 node {
 id
 ...TopicItem
 }
 }
 pageInfo {
 hasNextPage
 } } } /pages/Topics/Query.graphql

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/pages/Topics/index.js import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; export function Content({ data: { allTopics } }) { return (

Topics

{allTopics.map(topic => )}
); } export default compose( graphql(QUERY), withLoading )(Content);

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import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; export function Content({ data }) { const allTopics = data.allTopics.edges.map(({ node }) => node); return (

Topics

{allTopics.map(topic => )}
); } export default compose( graphql(QUERY), withLoading )(Content); /pages/Topics/index.js

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export function extractEdgeNodes(data) { return data.edges.map(({ node }) => node); } /utils/graphql.js

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export function extractEdgeNodes(data) { if (!data || !data.edges) { return []; } return data.edges.map(({ node }) => node); } /utils/graphql.js

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import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; import { extractEdgeNodes } from 'utils/graphql'; export function Content({ data }) { const allTopics = extractEdgeNodes(data.allTopics); return (

Topics

{allTopics.map(topic => )}
); } export default compose( graphql(QUERY), withLoading )(Content); /pages/Topics/index.js

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import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; import { extractEdgeNodes } from 'utils/graphql'; export function Content({ data }) { return (

Topics

{extractEdgeNodes(data.allTopics).map(topic => (
 ))}
); } export default compose( graphql(QUERY), withLoading )(Content); /pages/Topics/index.js

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#import "ph/components/TopicItem/Fragment.graphql"
 query TopicsPage { allTopics(first: 10) {
 edges {
 node {
 id
 ...TopicItem
 }
 }
 pageInfo {
 hasNextPage
 } } } /pages/Topics/Query.graphql

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#import "ph/components/TopicItem/Fragment.graphql"
 query TopicsPage($cursor: String) { allTopics(first: 10, after: $cursor) {
 edges {
 node {
 id
 ...TopicItem
 }
 }
 pageInfo {
 endCursor
 hasNextPage
 } } } /pages/Topics/index.js

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import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; import { extractEdgeNodes } from 'utils/graphql'; export function Content({ data }) { return (

Topics

{extractEdgeNodes(data.allTopics).map(topic => (
 ))}
); } export default compose( graphql(QUERY), withLoading )(Content); /pages/Topics/index.js

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import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; import { extractEdgeNodes } from 'utils/graphql'; export function Content({ data, loadMore }) { const hasNextPage = data.allTopics.pageInfo.hasNextPage; return (

Topics

{extractEdgeNodes(data.allTopics).map(topic => ( , ))}
); } export default compose( graphql(QUERY, { props: ({ data }) => ({ loadMore: () => { return data.fetchMore({ variables: { /pages/Topics/index.js

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import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; import { extractEdgeNodes } from 'utils/graphql'; export function Content({ data, loadMore }) { const hasNextPage = data.allTopics.pageInfo.hasNextPage; return (

Topics

{extractEdgeNodes(data.allTopics).map(topic => ( , ))}
); } export default compose( graphql(QUERY, { props: ({ data }) => ({ loadMore: () => { return data.fetchMore({ variables: { /pages/Topics/index.js

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import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; import { extractEdgeNodes } from 'utils/graphql'; export function Content({ data, loadMore }) { const hasNextPage = data.allTopics.pageInfo.hasNextPage; return (

Topics

{extractEdgeNodes(data.allTopics).map(topic => ( , ))}
); } export default compose( graphql(QUERY, { props: ({ data }) => ({ loadMore: () => { return data.fetchMore({ variables: { /pages/Topics/index.js

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))} ); } export default compose( graphql(QUERY, { props: ({ data }) => ({ loadMore: () => { return data.fetchMore({ variables: { cursor: data.allTopics.pageInfo.endCursor, }, updateQuery(previousResult, { fetchMoreResult }) { const connection = fetchMoreResult.allTopics; return { allTopics: { edges: [...previousResult.allTopics.edges, ...connection.edges] pageInfo: connection.pageInfo, }, }; }, }); }, }), }), withLoading, )(Content); /pages/Topics/index.js

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))} ); } export default compose( graphql(QUERY, { props: ({ data }) => ({ loadMore: () => { return data.fetchMore({ variables: { cursor: data.allTopics.pageInfo.endCursor, }, updateQuery(previousResult, { fetchMoreResult }) { const connection = fetchMoreResult.allTopics; return { allTopics: { edges: [...previousResult.allTopics.edges, ...connection.edges] pageInfo: connection.pageInfo, }, }; }, }); }, }), }), withLoading, )(Content); /pages/Topics/index.js $

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graphql(QUERY, { props: ({ data }) => ({ loadMore: () => { return data.fetchMore({ variables: { cursor: data.allTopics.pageInfo.endCursor, }, updateQuery(previousResult, { fetchMoreResult }) { const connection = fetchMoreResult.allTopics; return { allTopics: { edges: [...previousResult.allTopics.edges, ...connection.edges], pageInfo: connection.pageInfo, }, }; }, }); }, }), });

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graphql(QUERY, { props: ({ data }) => ({ loadMore: () => { return data.fetchMore({ variables: { cursor: data.allTopics.pageInfo.endCursor, }, updateQuery(previousResult, { fetchMoreResult }) { const connection = fetchMoreResult.allTopics; return { allTopics: { edges: [...previousResult.allTopics.edges, ...connection.edges], pageInfo: connection.pageInfo, }, }; }, }); }, }), });

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graphql(QUERY, { props: ({ data }) => ({ loadMore: () => { return data.fetchMore({ variables: { cursor: data[path].pageInfo.endCursor, }, updateQuery(previousResult, { fetchMoreResult }) { const connection = fetchMoreResult[path]; return { [path]: { edges: [...previousResult[path].edges, ...connection.edges], pageInfo: connection.pageInfo, }, }; }, }); }, }), });

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graphql(QUERY, { props: ({ data }) => ({ loadMore: () => { const path = 'allTopics'; return data.fetchMore({ variables: { cursor: data[path].pageInfo.endCursor, }, updateQuery(previousResult, { fetchMoreResult }) { const connection = fetchMoreResult[path]; return { [path]: { edges: [...previousResult[path].edges, ...connection.edges], pageInfo: connection.pageInfo, }, }; }, }); }, }), });

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function loadMore(data, path) { return data.fetchMore({ variables: { cursor: data[path].pageInfo.endCursor, }, updateQuery(previousResult, { fetchMoreResult }) { const connection = fetchMoreResult[path]; return { [path]: { edges: [...previousResult[path].edges, ...connection.edges], pageInfo: connection.pageInfo, }, }; }, }); } graphql(QUERY, { props: ({ data }) => ({ loadMore: () => loadMore(data, 'allTopics'), }), });

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/pages/Topics/index.js import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; import { extractEdgeNodes, loadMore } from 'utils/graphql'; export function Content({ data, loadMore }) { return (

Topics

, )}
); } export default compose( graphql(QUERY, { props: ({ data }) => ({ loadMore: () => loadMore(data, 'allTopics'), }), }), withLoading, )(Content);

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/pages/Topics/index.js import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; import { extractEdgeNodes, loadMore } from 'utils/graphql'; export function Content({ data, loadMore }) { return (

Topics

, )}
); } export default compose( graphql(QUERY, { props: ({ data }) => ({ loadMore: () => loadMore(data, 'allTopics'), }), }), withLoading, )(Content); %

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/pages/Topics/index.js import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; import { extractEdgeNodes, loadMore } from 'utils/graphql'; export function Content({ data, loadMore }) { return (

Topics

, )}
); } export default compose( graphql(QUERY, { props: ({ data }) => ({ loadMore: () => loadMore(data, 'allTopics'), }), }), withLoading, )(Content);

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/pages/Topics/index.js import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; import { extractEdgeNodes, loadMore } from 'utils/graphql'; export function Content({ data, loadMore }) { return (

Topics

, )}
); } export default compose( graphql(QUERY, { props: ({ data }) => ({ loadMore: () => loadMore(data, 'allTopics'), }), }), withLoading, )(Content); &

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/pages/Topics/index.js import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; import { extractEdgeNodes } from 'utils/graphql'; export function Content({ data }) { return (

Topics

{extractEdgeNodes(data.allTopics).map(topic => , )}
); } export default compose( graphql(QUERY), withLoading, )(Content);

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/pages/Topics/index.js import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; import { extractEdgeNodes } from 'utils/graphql'; export function Content({ data }) { return (

Topics

{extractEdgeNodes(data.allTopics).map(topic => , )}
); } export default compose( graphql(QUERY), withLoading, )(Content);

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/pages/Topics/index.js import TopicItem from 'components/TopicItem'; import QUERY from './Query.graphql'; import { compose, graphql } from 'react-apollo'; import withLoading from 'decorators/withLoading'; import { extractEdgeNodes } from 'utils/graphql'; export function Content({ data }) { return (

Topics

{extractEdgeNodes(data.allTopics).map(topic => , )}
); } export default compose( graphql(QUERY), withLoading, )(Content); '

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Mutations

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! Node interface " Connections # Mutations GraphQL Relay Specification https://facebook.github.io/relay/docs/graphql-relay-specification.html

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 mutation FollowTopic($id: ID!) { followTopic(id: $id) {
 id isFollowed } } { "data": {
 "followTopic": { "id": "VG9waWM6MQ==", "isFollowed": true } } } POST /graphql

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 mutation UnfollowTopic($id: ID!) { unfollowTopic(id: $id) {
 id isFollowed } } { "data": {
 "unfollowTopic": { "id": "VG9waWM6MQ==", "isFollowed": false } } } POST /graphql

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 mutation FollowTopic($id: ID!) { followTopic(id: $id) {
 id isFollowed } } { "data": {
 "followTopic": { "id": "VG9waWM6MQ==", "isFollowed": true } } } POST /graphql

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 mutation FollowTopic($id: ID!, $a: Int, $b: Int, $c: Int, $d: Int) { followTopic(id: $id, a: $a, b: $b, c: $c, d: $d) {
 id isFollowed } } POST /graphql

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 mutation FollowTopic($input: FollowInput!) { followTopic(input: $input) {
 clientMutationId topic {
 id isFollowed
 } } } https://facebook.github.io/relay/docs/graphql-mutations.html POST /graphql

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 mutation FollowTopic($input: FollowInput!) { followTopic(input: $input) {
 clientMutationId topic {
 id isFollowed
 } } } { "data": {
 "followTopic": { "clientMutationId": "0", "topic": {
 "id": "VG9waWM6MQ==", "isFollowed": true } } } } https://facebook.github.io/relay/docs/graphql-mutations.html POST /graphql

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 mutation FollowTopic($input: FollowInput!) { followTopic(input: $input) {
 clientMutationId topic {
 id isFollowed
 } } } { "data": {
 "followTopic": { "clientMutationId": "0", "topic": {
 "id": "VG9waWM6MQ==", "isFollowed": true } } } } https://facebook.github.io/relay/docs/graphql-mutations.html POST /graphql

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{topic.name}




{topic.description}




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mutation FollowTopic($input: FollowTopicInput!) { followTopic(input: $input) { topic { id isFollowed } } } /components/FollowButton/FollowTopic.graphql

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mutation UnfollowTopic($input: UnfollowTopicInput!) { unfollowTopic(input: $input) { topic { id isFollowed } } } /components/FollowButton/UnfollowTopic.graphql

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import CREATE_MUTATION from './FollowTopic.graphql';
 import REMOVE_MUTATION from './UnfollowTopic.graphql';
 
 export function FollowButton({ /* ... */ }) { /* ... */ } 
 export default compose( graphql(CREATE_MUTATION, { props: ({ ownProps: { topic: { id } }, mutate }) => ({ followTopic() { return mutate({ variables: { input: { id }, }, }); }, }), }), graphql(REMOVE_MUTATION, { /* ... */ }), )(FollowButton) /components/FollowButton/index.js

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import CREATE_MUTATION from './FollowTopic.graphql';
 import REMOVE_MUTATION from './UnfollowTopic.graphql';
 
 export function FollowButton({ /* ... */ }) { /* ... */ } 
 export default compose( graphql(CREATE_MUTATION, { props: ({ ownProps: { topic: { id } }, mutate }) => ({ followTopic() { return mutate({ variables: { input: { id }, }, optimisticResponse: { response: { node: { __typename: 'Topic', id, isFollowed: true }, }, } }); }, }), }), graphql(REMOVE_MUTATION, { /* ... */ }), )(FollowButton) /components/FollowButton/index.js

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import CREATE_MUTATION from './FollowTopic.graphql';
 import REMOVE_MUTATION from './UnfollowTopic.graphql';
 
 export function FollowButton({ topic, followTopic, unfollowTopic }) { if (topic.isFollowed) { return ( Following ); } return ( Follow ); } 
 export default compose( graphql(CREATE_MUTATION, { /* ... */ }), graphql(REMOVE_MUTATION, { /* ... */ }), )(FollowButton) /components/FollowButton/index.js

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import { Component } from 'ph/components/TopicFollowButton'; describe(Component.name, () => { const followed = buildTopic({ isFollowed: true }); const unfollowed = buildTopic({ isFollowed: false }); it('renders "Follow" text when is not following', () => { expect(shallow()).to.contain('Follow'); }); it('renders "Following" text when is following', () => { expect(shallow()).to.contain('Following'); }); it('can follow a topic', () => { const spy = sinon.spy(); const wrapper = shallow(); wrapper.simulate('click', { preventDefault() {} }); expect(spy).to.have.been.calledOnce; }); it('can unfollow a topic', () => { const spy = sinon.spy(); const wrapper = shallow(); wrapper.simulate('click', { preventDefault() {} }); expect(spy).to.have.been.calledOnce; }); }); /components/FollowButton/index.test.js

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 mutation FollowTopic($input: FollowInput!) { followTopic(input: $input) {
 clientMutationId topic {
 id isFollowed
 } } } { "data": {
 "followTopic": { "clientMutationId": "0", "topic": {
 "id": "VG9waWM6MQ==", "isFollowed": true } } } } https://facebook.github.io/relay/docs/graphql-mutations.html POST /graphql

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 mutation FollowTopic($input: FollowInput!) { followTopic(input: $input) {
 clientMutationId node {
 id isFollowed
 } } } { "data": {
 "followTopic": {
 "clientMutationId": "0", "node": { "id": "VG9waWM6MQ==", "isFollowed": true } } } } POST /graphql

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 mutation FollowTopic($input: FollowInput!) { followTopic(input: $input) {
 clientMutationId node {
 id isFollowed
 } } } { "data": {
 "followTopic": {
 "clientMutationId": "0", "node": { "id": "VG9waWM6MQ==", "isFollowed": true } } } } POST /graphql

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Forms

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#import "./Fragment.graphql"
 
 mutation UpdateSetting($input: SettingInput!) { updateSettings(input: $input) { node {
 ...SettingsForm
 } } } /pages/Settings/Mutation.graphql

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function SettingsPage({ data: { settings }, submit }) { return ( ); } export default compose( graphql(QUERY) graphql(MUTATION, { props: ({ ownProps, mutate }) => ({ submit(input) { return mutate({ variables: { input }, }); }, }), }), ); /pages/Settings/index.js

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function SettingsPage({ data: { settings }, submit, onSubmit }) { return ( ); } export default compose( graphql(QUERY) graphql(MUTATION, { props: ({ ownProps, mutate }) => ({ submit(input) { return mutate({ variables: { input }, }); }, onSubmit(node) { // handle successful update }, }), /pages/Settings/index.js

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 mutation UpdateSetting($input: SettingInput!) { updateSettings(input: $input) { node {
 ...SettingsForm
 } } } { "data": {
 "updateSettings": { "node": {
 "...": "...", } } } } POST /graphql

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 mutation FollowTopic($input: FollowTopicInput!) { updateSettings(input: $input) { node {
 id isFollowed
 }
 errors { field messages } } } POST /graphql { "data": {
 "updateSettings": { "node": {
 "...": "...", }
 "errors": [{
 "name": ["missing"], "email": ["invalid"], }] } } }

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 mutation FollowTopic($input: FollowTopicInput!) { updateSettings(input: $input) { node {
 id isFollowed
 }
 errors { field messages } } } POST /graphql { "data": {
 "updateSettings": { "node": {
 "...": "...", }
 "errors": [{
 "name": ["missing"], "email": ["invalid"], }] } } }

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GraphQL
 Apollo
 Relay Specification
 ( Node
 ) Connections
 * Mutations
 + Data Fetching
 , Pagination
 - Mutations
 . Forms Recap

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Thanks /