How to Filter Slug Data in React with Next.js and Sanity

Описание: Discover how to effectively filter slug data to display related posts using React, TypeScript, and Sanity in your Next.js project.
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This video is based on the question https://stackoverflow.com/q/72676079/ asked by the user 'Julia Schafer' ( https://stackoverflow.com/u/17939803/ ) and on the answer https://stackoverflow.com/a/72677028/ provided by the user 'Peter Kellner' ( https://stackoverflow.com/u/46942/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Filter Slug Data in React with Next.js and Sanity

When building a blog or a content-driven website, you might encounter the need to display related posts based on a category. If you're using Sanity as your content management system and building your frontend with Next.js, you might be wondering: how can I filter slug data to show related posts from the same category? In this post, we’ll walk you through a simple solution to achieve this using React and TypeScript.

The Problem

Suppose you have a blog setup where each post has an associated category. When a user views a specific post, you want to show other posts that belong to the same category. However, fetching all posts and attempting to filter them in your component can be tricky, especially if you're unsure how to refer to the current post category.

The Solution

Let's break down the process of filtering slug data into manageable steps. We will be using the React hook useEffect for data fetching and then filter the data based on the category of the current post.

Step 1: Fetch All Posts

First, you must fetch all the posts from your Sanity dataset. This can be accomplished using the sanityClient.fetch function. You should initiate this data fetching in a useEffect hook.

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Step 2: Pass Project Data to the Component

Next, ensure that your component is receiving the current post's data, which includes the category. You will use the getServerSideProps function to fetch the current project based on the slug. Here's how to do it:

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Step 3: Filter and Display Related Posts

Now that you have both the fetched data and the current project's category, you can filter the related posts right in your component. Here’s how you can do it:

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

Summary

By following these steps, you can easily filter slug data in your Next.js app to show related posts from the same category. Make sure to remember the following key points:

Fetch all posts from Sanity within a useEffect.

Utilize getServerSideProps to get data for the specific post.

Filter and map the fetched data based on the category of the current post to showcase related posts.

Implementing these practices will not only enhance user experience but also keep your content organized and accessible. Happy coding!