Fixing invalidateQueries Issue in Your Simple React App with React Query

Learn how to resolve issues with `invalidateQueries` in a React app using React Query to ensure your data updates correctly after mutations.
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Fixing invalidateQueries Issue in Your Simple React App with React Query

As a beginner in React Query, you may encounter some challenges while implementing CRUD functionality in your applications. One common issue that developers face is when the invalidateQueries function does not seem to work as expected, resulting in stale or outdated data being displayed. If you are dealing with this situation in your simple React app, specifically with a MemoList and detail viewing functionality, read on for a detailed guide on how to resolve the problem.

Understanding the Problem

In your application, you attempt to update a resource using a mutation with the useMutation hook, but the related detail view does not reflect the updated data. Instead, it incorrectly shows the previous state. This typically happens because the cache for the data you're trying to refresh has not been invalidated properly.

For example, you have a mutation setup to update the contents and navigate to the detail page. Despite using invalidateQueries, the detail data does not refresh with the latest content. Here’s a brief recap of your existing code:

[[See Video to Reveal this Text or Code Snippet]]

Upon submission, you call:

[[See Video to Reveal this Text or Code Snippet]]

When you load your detail page, you attempt to get the updated data as follows:

[[See Video to Reveal this Text or Code Snippet]]

While the console shows the correct updated value, the detail page remains unchanged. Let's delve into how to fix this issue.

Solution Steps

1. Update Your useMutation to Utilize onSuccess

A key adjustment is to leverage the onSuccess callback provided by the useMutation hook directly. This callback gets triggered after your mutation successfully completes and is an ideal place to invalidate your queries.

Here’s the revised useMutation definition:

[[See Video to Reveal this Text or Code Snippet]]

2. Modify the mutate Method

In the current setup, the way you are passing arguments to your mutate function needs to accommodate the structure it expects. Instead of sending multiple parameters, wrap them in an object:

[[See Video to Reveal this Text or Code Snippet]]

This change allows your mutation function to destructure the parameters correctly, facilitating the successful API call.

3. Adjust the updateOne Function

Now, update the updateOne function to handle the incoming object properly:

[[See Video to Reveal this Text or Code Snippet]]

This adjustment ensures that updateContent and id are taken as part of a single object, making it straightforward for API calls.

Conclusion

By correctly utilizing the onSuccess callback in your mutation and refining how you handle the parameters, you can effectively resolve issues related to invalidateQueries. This approach enhances data consistency across your application, ensuring that your detail page reflects the most recent updates after mutations are performed.

In summary, your code should now look like:

[[See Video to Reveal this Text or Code Snippet]]

With these changes implemented, you should find that your detail page now updates correctly to reflect the latest changes made. Happy coding!