Скачать или смотреть How to Add an Extra images Field in Laravel Nova Without a Database Column

Learn how to seamlessly integrate an extra `images` field in your Laravel Nova forms without encountering database errors, and streamline your application’s functionality.
---
This video is based on the question https://stackoverflow.com/q/60084755/ asked by the user 'Hasnat Babur' ( https://stackoverflow.com/u/3501553/ ) and on the answer https://stackoverflow.com/a/65221842/ provided by the user 'Hasnat Babur' ( https://stackoverflow.com/u/3501553/ ) 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: Laravel Nova extra 'images' field on forms without actual database column

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.
---
How to Add an Extra images Field in Laravel Nova Without a Database Column

Laravel Nova is a powerful administration panel for Laravel applications. However, developers often face challenges when they want to include additional fields in their resource forms, especially if those fields do not correspond directly to a database column. One common example is the need to add an extra images field for specific business logic, which can throw database-related errors if not handled properly.

In this guide, we will explore how to add an extra images field in Laravel Nova forms without relying on an actual database column. This guide will help you avoid errors like “column not found” and allow your application to function smoothly.

Understanding the Problem

When attempting to create an extra field in Laravel Nova that does not relate to an existing database column, you might encounter issues during form submission. Specifically, errors will arise indicating that the column does not exist because the mapper expects to find every form field in the database schema.

For example, if you have a field named to_profile_gallery, attempting to save or update the model will raise a database error since the column does not exist.

The Solution: Customizing the Fill Fields Method

To resolve this issue, we will customize the fillFields method in the Nova resource to ignore the extra field when saving. Here’s how you can do it step-by-step:

Step 1: Modify Your Nova Resource

Open your specific Nova Resource, for instance, app/Nova/Post.php.

Implement the fillFields() method to unset the extra field before saving the model.

Here is an example of what this code might look like:

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

Step 2: Utilize Custom Functions for Filling and Resolving Fields

Next, you'll need to handle the saving and retrieving of data associated with the extra field. Here’s how you can do this with custom callbacks:

Use fillUsing to define how the extra field should save data.

Use resolveUsing to determine how data is retrieved for that field.

Here is how to implement these functions on your extra images field:

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

Final Thoughts

By following these steps, you can successfully add an extra images field to your Laravel Nova resource forms without hitting those pesky database errors. This approach allows you to maintain the integrity of your application while providing the flexibility you need for additional business logic.

If you're still facing difficulties or have questions about the implementation, feel free to reach out for help. Happy coding!