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Fix with-apollo example #17686

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merged 2 commits into from Oct 8, 2020
Merged

Fix with-apollo example #17686

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26f4817
Fix with-apollo example
HaNdTriX Oct 7, 2020
2789cd4
Merge branch 'canary' into examples/apollo-client
kodiakhq[bot] Oct 8, 2020
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28 changes: 15 additions & 13 deletions examples/with-apollo/components/Submit.js
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@@ -1,5 +1,4 @@
import { gql, useMutation } from '@apollo/client'
import { ALL_POSTS_QUERY, allPostsQueryVars } from './PostList'

const CREATE_POST_MUTATION = gql`
mutation createPost($title: String!, $url: String!) {
Expand All @@ -26,19 +25,22 @@ export default function Submit() {

createPost({
variables: { title, url },
update: (proxy, { data: { createPost } }) => {
const data = proxy.readQuery({
query: ALL_POSTS_QUERY,
variables: allPostsQueryVars,
})
// Update the cache with the new post at the top of the list
proxy.writeQuery({
query: ALL_POSTS_QUERY,
data: {
...data,
allPosts: [createPost, ...data.allPosts],
update: (cache, { data: { createPost } }) => {
cache.modify({
fields: {
allPosts(existingPosts = []) {
const newPostRef = cache.writeFragment({
data: createPost,
fragment: gql`
fragment NewPost on allPosts {
id
type
}
`,
})
return [newPostRef, ...existingPosts]
},
},
variables: allPostsQueryVars,
})
},
})
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