How to Use useParams and Array.find for Dynamic Blog Post Detail in React

Описание: Learn how to implement proper routing and state management in React to display individual guide details using `useParams` and `Array.find`.
---
This video is based on the question https://stackoverflow.com/q/68961570/ asked by the user 'sol_s' ( https://stackoverflow.com/u/15149514/ ) and on the answer https://stackoverflow.com/a/68961868/ provided by the user 'Drew Reese' ( https://stackoverflow.com/u/8690857/ ) 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: using useparams and array.find to display detailed data

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.
---
Dynamic Blog Application in React: Fetching Detailed Data

Creating a blog application using React is a fantastic way to practice your skills and learn about state management and routing. However, as you build complex components, you might encounter issues. One common problem developers face is how to correctly retrieve and display detailed guide data based on the post's unique identifier. In this guide, we will dig into the problem of displaying detailed data for individual blog entries using useParams and Array.find and guide you through the solution step by step.

The Problem

When fetching detailed data for individual guides, you might realize that the data shown is not specific to each post. The findBlogs method, which is expected to deliver the relevant blog details, instead returns just the most recent input. Here’s a snippet of what the current state looks like:

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

This leads to all blogs displaying the same information because it uses the id of the last edited blog instead of the specific blog's ID.

Understanding the Code Structure

Input Context Provider

Your context provider is responsible for managing the global state of blog entries. Here’s how it currently looks:

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

Make sure to save and update the array of all guides and not confuse it with the last edited guide.

Write Blog Post Component

In your WriteBlogPost component, you are using state to hold the new blog information, then setting the guide data globally:

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

This workflow is correct, but keep in mind that saving the last edited blog in the context can lead to inconsistencies when accessing individual posts.

All Blogs Component

Your AllBlogs component is where you are mapping through allBlogPosts to display them. However, if you incorrectly access the blogPost variable which holds only the last submitted blog, you will run into the issue of displaying duplicate content:

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

The Solution

To ensure each guide displays its correct data, update the link to point to the current post's id instead of the most recent one. Adjust your AllBlogs component like this:

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

Key Changes Made:

Switch to post.id: This enables routing to the specific blog's detailed view rather than the last edited post.

Use Unique Key in Mapping: Using key={post.id} enhances performance and helps React identify which items have changed, are added, or are removed.

Conclusion

By implementing these simple adjustments to your coding logic, your React blog application will handle individual guide views correctly. Remember, the keys to effective routing in React are clear data management and being accurate with identifiers. This way, when you click to read a guide, you’ll see the correct details that align with the selected list item. Happy coding!