Ways to retrieve the identifier of the uploaded document in GridFs for linking with another model

After creating a GridFS and uploading an image using the code snippet below:

app.post("/upload", upload.single("photo"), function(req, res) {
    res.redirect("/images");
})

I also have a separate model for users:

var userSchema = new mongoose.Schema({
    username: String,
    password: String,
    posts: [
        {
            type: mongoose.Schema.Types.ObjectId,
            ref: "fs"
        }
    ]
});

My current concern is associating the uploaded image in GridFS with the logged-in User. While I can retrieve the user id, I am unsure how to obtain the id of the uploaded image. I would appreciate a detailed explanation if possible as I am still a novice in this area. Thank you.

Answer №1

The information regarding the file or photo that was uploaded is linked to the request object and can be accessed through req.file

For instance, to retrieve the ID of the uploaded image, you can use the following code snippet

app.post("/upload", upload.single("photo"), function(req, res) {
    const id = req.file.id;
    res.redirect("/images");
})

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