update_apollo_link_state_from_mutation.js

import React, { Component } from 'react'
// With apollo mutations you are able to access the link state from within a second argument in a mutation render prop
export default class App extends Component {
  render() {
    return (
      <Mutation mutation={UPDATE_POST}>
        {(updatePost, result) => {
          // Here
          const onSuccess = () => result.client.writeData({data: isEditMode: false)
          return <PostForm post={post} onSubmit={updatePost} onSuccess={onSuccess} />
        }}
      </Mutation>
    )
  }
}