Learn React with TypeScript 3

Updating the cache after a Mutation

Let's think through the problem one more time:

• We have some information about a repository in a cache that includes the number of stars it has.
• When we star the repository, we want to see that the number of stars has been incremented by one.
• What if we could just increment the number of stars in the cache by one? This should hopefully resolve the problem.

So, let's give this a go and update the cache after the mutation has finished:

1. First, let's remove the refetchQueries prop we implemented in the last section.
2. There is an update prop on the Mutation component that we can leverage to update the cache. So, let's start to implement this:

<Mutation  mutation={STAR_REPO}  update={cache => { // Get the cached ...