How to Upload Multiple Files to MongoDB Using Multer and Node.js

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The Problem: Uploading Multiple Files

However, you're struggling to persist these files in MongoDB.

The challenge lies not only in handling the uploaded files but also in ensuring they are saved properly in your database after the upload process.

Example of Your Current Code

Your initial attempt looked something like this:

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

In this implementation, you’re attempting to save the uploaded files but not awaiting the completion of the Promise, which might lead to incorrect responses.

The Solution: Properly Handle File Uploads

To effectively upload multiple files and ensure they’re saved to MongoDB, follow these steps:

Modify the way you handle the promises in your code. Instead of returning the Promise directly, chain the response effectively:

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

Step 2: Break Down the Code

Response Handling: Once all files are successfully saved, respond with a success message. Error handling is crucial for debugging; ensure that you have a fallback to catch any potential issues.

Key Points

Error Handling: Always implement error handling to avoid server crashes and provide useful feedback in case of failures.

Validation: Consider validating uploaded files (e.g., checking file types, sizes) before saving to MongoDB.

Security: Ensure that your upload folder and MongoDB collection are secured against unauthorized access.

Conclusion