Скачать или смотреть How to Get the Image URL from Firebase and Save it in MongoDB for Your Blog Post

Learn how to effectively upload images to Firebase, retrieve their URLs, and save them within a MongoDB object for your guides. This guide simplifies the process for developers using JavaScript and React.
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This video is based on the question https://stackoverflow.com/q/77674048/ asked by the user 'Dagger' ( https://stackoverflow.com/u/20386110/ ) and on the answer https://stackoverflow.com/a/77674650/ provided by the user 'Doug Stevenson' ( https://stackoverflow.com/u/807126/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Uploading Images to Firebase and Saving URLs to MongoDB

Creating a blog platform where users can upload images alongside their posts is a fantastic way to enhance user engagement. However, developers often encounter the challenge of efficiently retrieving the image URL after the upload process and saving it as part of the guide object. In this post, we'll explore how to resolve this issue, ensuring the blog's image is seamlessly integrated into its MongoDB storage.

The Problem

When users upload an image and submit a guide, you might find that the URL of the image is generated after the guide has already been created. As a result, the image path in the MongoDB object could end up being an empty string. Even if you try to enforce the image requirement in your schema, there’s a chance that the image URL is not generated quickly enough.

Example Scenario

Imagine this code snippet from your application:

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

Here, the image is uploaded, and you attempt to retrieve its URL. However, since the upload process is asynchronous and non-blocking, you might end up trying to save the guide before the URL is generated.

The Solution: Using await for Synchronous Execution

To address this issue, the best practice is to leverage the await function for handling promises. This method ensures the code executes in sequence, making it easier to read and ensuring that the URL is generated before the guide is created.

Step-by-Step Guide

Use await for Uploading and Retrieving URLs
Replace the .then() chain with await to block the execution until the image is uploaded, and the URL is retrieved.

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

Update Your submitHandler Code
Here's how the modified submitHandler function should look:

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

Display the Image in Your Component
Ensure that you display the image correctly in the component that renders the guide:

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

Conclusion

By utilizing await for your Firebase Storage calls, you ensure that the image URL is generated before attempting to save your guide in MongoDB. This straightforward adjustment enhances the reliability of your application and improves the overall user experience by ensuring images are correctly displayed alongside their respective posts.

With these changes in place, your guides will be enriched with uploaded images, making your platform visually appealing and engaging for users. Happy coding!