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Скачать или смотреть Creating JSON Data from ACF Repeater Fields in GatsbyJS

  • vlogize
  • 2025-10-10
  • 0
Creating JSON Data from ACF Repeater Fields in GatsbyJS
GatsbyJS: create json/structured data from ACF repeater fieldreactjsgraphqlgatsby
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Описание к видео Creating JSON Data from ACF Repeater Fields in GatsbyJS

Learn how to handle ACF Repeater fields in GatsbyJS with React Helmet and avoid common errors. This step-by-step guide assists developers in generating structured data seamlessly.
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This video is based on the question https://stackoverflow.com/q/68239093/ asked by the user 'TurboTobias' ( https://stackoverflow.com/u/12823829/ ) and on the answer https://stackoverflow.com/a/68427773/ provided by the user 'Ferran Buireu' ( https://stackoverflow.com/u/5585371/ ) 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: GatsbyJS: create json/structured data from ACF repeater field

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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.

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Creating JSON Data from ACF Repeater Fields in GatsbyJS: A Simple Guide

As a web developer working with GatsbyJS, you may find yourself needing to create structured data for your site, especially when you're using Advanced Custom Fields (ACF). One common challenge developers face is working with ACF Repeater fields. In this guide, will walk you through the steps to efficiently manage ACF Repeater data in GatsbyJS using React Helmet, providing you with a solid foundation to build upon.

Understanding the Problem

When using ACF Repeater fields, you can create multiple records of structured data. For instance, you might have multiple schema entries for a single page. The issue arises when there are instances where these repeater fields do not contain any data. In such cases, if your code tries to access properties of a null or undefined object, it can lead to errors and break your site.

You might encounter the following error in your console:

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

This indicates that your code is trying to call .map on a null value, leading to a failure in generating the expected output.

The Solution: Checking for Field Availability

To fix this error, you need to ensure that your code validates the existence of data before attempting any operations on it. Here's how you can achieve that in your GatsbyJS project.

Step-by-Step Implementation

Update Your GraphQL Query: Make sure your GraphQL query retrieves the necessary schema data. Below is an example of what your query may look like.

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

Modify Your Helmet Setup: In your component that renders the schema data using React Helmet, update your map function to include a condition that checks for the presence of your repeater fields.

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

Key Changes Made

Conditional Operator: The addition of wpPage.schemaMarkup.schemarepeater && ensures that the code does not attempt to map through null, thereby preventing the error.

Null Check: The schemaJson !== null condition ensures that only valid objects are converted into JSON scripts.

Conclusion

By implementing these checks, you ensure that your GatsbyJS application robustly handles ACF Repeater fields, even when some pages do not contain values. This simple yet effective solution prevents runtime errors and maintains the integrity of your site's structured data.

If you're a developer looking to enhance your GatsbyJS skills, mastering the use of ACF fields will greatly improve your ability to create dynamic, data-driven applications. Feel free to reach out if you have further questions or need assistance—happy coding!

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