Скачать или смотреть Solving the Active Storage Rails 6 API Issue: Inserting into active_storage_attachments

Discover how to successfully insert data into the `active_storage_attachments` table in Rails 6 API with our step-by-step guide and sample code.
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This video is based on the question https://stackoverflow.com/q/71672256/ asked by the user 'Lyndon Abesamis' ( https://stackoverflow.com/u/8317221/ ) and on the answer https://stackoverflow.com/a/71837476/ provided by the user 'Lyndon Abesamis' ( https://stackoverflow.com/u/8317221/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Troubleshooting Active Storage API in Rails 6

If you're developing an API with Ruby on Rails that uses Active Storage for file uploads, you may have encountered an issue where uploads work perfectly fine, but entries are not being created in the active_storage_attachments table. This can be frustrating, especially after successfully inserting blobs into the active_storage_blobs table. Let's explore the problem and pinpoint a solution.

Understanding the Problem

When your API handles file uploads with Active Storage, it typically involves two main steps:

Inserting a Blob: This represents the uploaded file in the active_storage_blobs table.

Creating an Attachment: This creates a record in the active_storage_attachments table, linking the blob to a specific model in your application.

However, many developers face a situation where the first step is successful, but the second step (inserting the record in the active_storage_attachments table) fails.

In one particular instance, a developer shared their code where they used the Api::V1::Activestorage::DirectUploadsController to handle blob creation, but observed that attachments were not being registered in the database.

Common Symptoms

Blob records are successfully created.

Files are uploaded to storage without issue.

No records appear in active_storage_attachments despite attempts to associate uploads with a model.

Implementing the Solution

To resolve this issue, you'll need to refactor your controller to ensure the attachment is created after the blob is successfully uploaded. Here’s how you can do it:

Step-by-step Refactoring

Create a New Method for Attachment: Introduce a new action in your controller to handle the attachment process explicitly.

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

Explanation of the Key Changes

attached_create Method: This method is responsible for creating the attachment record. When you're ready to attach a file to a specific model, make an API call that triggers this method, passing the correct parameters for your attachment.

Parameter Permitting: Ensure that the params_attached method safely permits the necessary attributes. This should include :name, :record_type, :record_id, and :blob_id, which are crucial for establishing the polymorphic relationship.

Usage in React

When you call the attached_create method from your React frontend after the blob has been successfully uploaded, ensure that you correctly pack and send all required attributes.

Conclusion

By introducing a dedicated method for creating attachments and ensuring proper parameter handling, you can successfully resolve the issue of entries not being created in the active_storage_attachments table. JavaScript and Rails integration can be tricky, but with a little refactoring, you can have a smooth API experience.

Feel free to reach out with any further questions or if you need assistance implementing this in your project!