CODEWITHSUNDEEP
node.jsexpressmongoose
rob_hicks
rob_hicks

Reputation: 1744

Why won't this save file content in mongodb

I'm using express 2.5.8 and mongoose 2.7.0. Here is my document schema. It's collection is where I want to store files associated with a transaction (specifically in the content String):

var documentsSchema = new Schema({
    name            :    String,
    type            :    String,
    content         :    String,    
    uploadDate      :    {type: Date, default: Date.now}
});

And here is part of my transaction schema:

var transactionSchema = new Schema({
    txId            :    ObjectId,
    txStatus        :    {type: String, index: true, default: "started"},
    documents       :    [{type: ObjectId, ref: 'Document'}]
});

And the express function I'm using to save a document to a transaction:

function uploadFile(req, res){
    var file = req.files.file;
    console.log(file.path);
    if(file.type != 'application/pdf'){
        res.render('./tx/application/uploadResult', {result: 'File must be pdf'});
    } else if(file.size > 1024 * 1024) {
        res.render('./tx/application/uploadResult', {result: 'File is too big'});
    } else{
        var document = new Document();
        document.name = file.name;
        document.type = file.type;
        document.content = fs.readFile(file.path, function(err, data){
            document.save(function(err, document){
                if(err) throw err;
                Transaction.findById(req.body.ltxId, function(err, tx){
                    tx.documents.push(document._id);
                    tx.save(function(err, tx){
                        res.render('./tx/application/uploadResult', {result: 'ok', fileId: document._id});
                    });
                });
            });
        });
    }
}

The transaction gets created without any problems. And the document record gets created and everything gets set but the content.

Why is the content not getting set? fs.readFile returns the file as a buffer without any problems.

Upvotes: 0

Views: 1347

Answers (2)

rriemann
rriemann

Reputation: 548

Instead of going down the path using async calls like suggested by @ebohlman, you can also use synchronous calls to get the file content.

javascript document.content = fs.readFileSync(file.path)

Upvotes: 0

ebohlman
ebohlman

Reputation: 15003

Change:

    document.content = fs.readFile(file.path, function(err, data){

To:

    fs.readFile(file.path, function(err, data){
       document.content = data;

Remember that readFile is asynch, so the contents aren't available until your callback gets called (the tipoff should have been that you weren't making any use of the data parameter).

Upvotes: 1

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