Скачать или смотреть Building a React-Native Application with GraphQL and FlatList: Displaying User Roles

Discover how to integrate GraphQL with your `React-Native` app using `FlatList` for displaying user roles efficiently.
---
This video is based on the question https://stackoverflow.com/q/63152721/ asked by the user 'sdbol' ( https://stackoverflow.com/u/427995/ ) and on the answer https://stackoverflow.com/a/63152899/ provided by the user 'UjinT34' ( https://stackoverflow.com/u/9602863/ ) 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: React-native app with GraphQL and using FlatList

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.
---
Building a React-Native Application with GraphQL and FlatList: Displaying User Roles

In the rapidly evolving world of mobile application development, using React Native with GraphQL offers a powerful combination for managing and presenting data. However, you might encounter some challenges along the way. One such challenge is correctly displaying user roles within a FlatList. In this guide, we will address a common question facing developers when integrating GraphQL in their React Native applications and offer a clear solution.

The Issue

Imagine you are working on a user management interface in your React Native application. You have successfully fetched user data using GraphQL, and your goal is to display not only the user’s basic information such as their name and email, but also the roles associated with the user. While you're able to display the first name, last name, and email easily, the FlatList for user roles is not rendering as expected.

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

The challenge lies in the way the roles are being extracted and displayed in the FlatList. Let’s walk through the solution step by step.

Understanding the Solution

The primary issue in your implementation arises from incorrectly referencing the role data and the way items are being rendered. Let’s break down the necessary changes:

Step 1: Correctly Extract the Roles Data

Instead of trying to access roles through _.get(user.roles,"data.user.roles",""), which doesn't accurately reference the structure of the data returned from your GraphQL query, you should directly access the roles like this:

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

Here, we are ensuring that if no roles are returned, an empty array is passed to prevent errors in rendering.

Step 2: Render the Items Appropriately

In your renderItem function, you need to extract the name property directly from the item, rather than accessing it through item.roles.name. Here’s the correct implementation:

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

This ensures that the FlatList correctly displays the name of each role.

Step 3: Key Extraction

Ensure that the keyExtractor refers to the individual role's id without including the roles property in the path:

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

Final Component Implementation

With these corrections in place, here’s how your AccountSection component should look:

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

Conclusion

By implementing the above changes, you can successfully render user roles within your React Native application using GraphQL and FlatList. This not only enhances your app's functionality but also improves the user experience by presenting relevant information clearly.

Feel free to reach out if you have any further questions or need additional assistance as you develop your application! Happy coding!