Скачать или смотреть How to Use refetchQueries in Apollo Client After Multiple Updates

Discover an effective way to handle `refetchQueries` in Apollo Client when performing multiple mutations in the correct state. Learn how to ensure data consistency in your editable table.
---
This video is based on the question https://stackoverflow.com/q/64138780/ asked by the user 'Ar26' ( https://stackoverflow.com/u/9596473/ ) and on the answer https://stackoverflow.com/a/64203740/ provided by the user 'Ar26' ( https://stackoverflow.com/u/9596473/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Apollo Client - refetchQueries after multiple updates

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Managing State with Apollo Client: Refetching Queries After Multiple Updates

When working with Apollo Client, especially in a React application, you may run into scenarios where you need to perform multiple mutations before updating the UI or relaying new data to your components. A common issue developers face is finding a reliable method to refetch queries after a series of mutations, particularly when the order of these mutations might not be predetermined. This guide will walk you through a workaround to effectively handle this situation in Apollo Client 3.

The Problem at Hand

Consider you’re building an editable table using Apollo Client. You have multiple API mutations corresponding to different columns, like name, age, and city. Here is a typical structure of how these mutations might look:

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

The challenge arises when the order of these mutations doesn’t remain fixed. You want to ensure that your queries are refetched only after all mutations have completed, but how do you do that consistently?

The Solution: Using the refetch Method from useQuery

Instead of relying solely on refetchQueries in each mutation, you can take advantage of the useQuery hook's refetch method. This allows you to manually control when to refresh your data after all the required mutations have been executed. Here's how you can implement this solution step by step:

Step 1: Set Up Your Mutations

You can maintain your existing mutation setup. Here's a snippet illustrating how to initiate those mutations:

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

Step 2: Use the useQuery Hook

By incorporating the useQuery hook, you not only fetch data but also get access to the refetch method:

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

Step 3: Execute Mutations and Refetch Data

Next, you can execute all your mutations and call the refetch method afterwards to ensure your component updates with the latest data. Here’s how you might implement it using Promise.all() to handle the asynchronous nature of the operations:

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

This triggers all the mutations at once and, once they’re complete, fetches the latest user data.

Key Benefits of This Approach

Controlled Refetching: You have complete control over when to refetch your queries, allowing for a more consistent state across your application.

Flexibility: Since promises can be executed in any order, this method simplifies the tracking of completed updates.

Improved Performance: By batching mutations and refetching only once, you may enhance the performance of your application, minimizing unnecessary network calls.

Conclusion

As a developer using Apollo Client in your React applications, handling multiple mutations efficiently is crucial. By using the refetch method from the useQuery hook, you can ensure that your data reflects the latest updates without relying on the order of mutations. This approach not only simplifies your code but also leads to a smoother user experience. So the next time you find yourself needing to sync your UI with backend changes across multiple updates, remember the power of Promise.all combined with refetch!



By implementing this solution, your editable table will present consistent and up-to-date information to your users, directly enhancing the user experience. Happy coding!