I have developed a platform for users to share text and an image with their posts.
Currently, I am assigning the complete URL of the image associated with each post using post.postPicture. This method is functional.
The images are saved in the MongoDB storage under /$useruid/$filename.
However, in case the filename or userid changes (assuming the path remains unfixed), what would be the best approach to reference the correct image for each post?
Using data that changes within a document path is not advisable. It's best to avoid this practice.
I am unsure about the exact details of your userid. User IDs provided by Firebase Authentication should remain constant and should not be subject to change. If there is a screen name that users can modify, it should not be part of the document path. Instead, assign each user a unique, unchanging ID and store their screen name in a separate document linked to that ID.
The same principle applies to the concept of filename. If it has the potential to be altered, it should not be included in a document path. Generate a random ID and store the file name in a field within a document associated with that ID.
This approach of using random IDs is precisely why functions like add() exist in Firestore. The add() function generates a random ID for you, allowing you to fill the document with pertinent information for easy retrieval later on. For more information, refer to the official documentation.
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