Mongoose doesn't save data to the MongoDB

Question

Below is an object literal I am trying to save to MongoDB. It is defined within the app.js file which is an Express server. As the object is hardcoded within the server, my

Answer 1

It looks like the problem is in your news schema's save middleware.

newsSchema.pre('save', function(next){
    if( !this.addedOn ) this.addedOn = new Date();
    if( !this.addedBy ) this.addedBy = {first: "admin", last: "admin"};
});

Your function receives a "next" callback which you must execute to let mongoose know that you are done and ready to save the document. Since you're not calling it, it could explain why you get nothing saved, and also no errors.

Try just calling next like this:

newsSchema.pre('save', function(next){
    if( !this.addedOn ) this.addedOn = new Date();
    if( !this.addedBy ) this.addedBy = {first: "admin", last: "admin"};
    next();
});

Answer 2

My code was different, but my result was apparently the same: Apparently, I wasn't saving to Mongo despite the .save call. HOWEVER, the save was actually taking place, I just didn't realize what some of the Mongoose parameters mean, and that it takes some liberties forming your collection name.

More specifically, when you use:

mongoose.model('MyModelName', invitationSchema);

to form your collection name, your model name gets converted to lower case and an "s" gets appended (if not there). See also http://samwize.com/2014/03/07/what-mongoose-never-explain-to-you-on-case-sentivity/

You can, if you want, bypass these collection naming conventions to some extent by using a collection name parameter when you create the schema. See http://mongoosejs.com/docs/guide.html#collection

Here's mine:

const modelName = "SharingInvitation";
const collectionName = modelName + "s";

const numberOfHoursBeforeExpiry = 24;

var expiryDate = new Date ();
expiryDate.setHours(expiryDate.getHours() + numberOfHoursBeforeExpiry);

var invitationSchema = new Schema({
    // _id: (ObjectId), // Uniquely identifies the invitation (autocreated by Mongo)

    // gives time/day that the invitation will expire
    expiry: { type: Date, default: expiryDate },

    // The user is being invited to share the following:
    owningUser: ObjectId, // The _id of a PSUserCredentials object.
    capabilities: [String] // capability names
}, { collection: collectionName });

Answer 3

I found a few problems when trying to reproduce this locally.

You're not calling next() in newsSchema.pre('save')

Should be

newsSchema.pre('save', function(next){
    if( !this.addedOn ) this.addedOn = new Date();
    if( !this.addedBy ) this.addedBy = adminUser;
    next();
});

You also need to make sure that you are connected to the db before doing any of this stuff, not sure if you are or not since i didn't see that part of the code.