Virtuals to JSON output does not appear to be working

[Kirk Bushell]

I've been trying for days to get this to work, mostly because I think getting it to work would result in the DRYest code for my application.

I have the current schema:

var TechnologySchema = new Schema({

name: { type: String, unique: true },

type: String,

attributes: Schema.Types.Mixed

});

TechnologySchema.virtual( 'iron' ).get( function() {

console.log( this );

if ( 'unit' == this.type ) {

var iron = this.attributes.armour * 100;

if ( _.contains( this.attributes.abilities, 'E' ) ) {

iron = iron / 2;

}

if ( _.contains( this.attributes.abilities, 'FA' ) ) {

iron += iron * 0.3;

}

}

return iron;

});

TechnologySchema.set( 'toJSON', { virtuals: true } );

mongoose.model( 'Technology', TechnologySchema );

Then, after fetching the technology data, I have the following:

console.log( JSON.stringify( technologies ) );

Now, based on everything I've read - JSON.stringify should be calling toJSON on my collection, which will look at the virtual attributes I have defined (as specified in the toJSON option) and do the conversion, pull in the value.etc.

What's annoying me is - the virtual attribute is never actually getting called - which means no attribute in the JSON.

Can anyone tell me what the hell is going on?! I'm sure it's something super basic I've missed =\

[Kirk Bushell]

Just want to add that I've tried using toJSON and toObject settings on the schema, both have failed. I never see the virtual attribute ('iron') and that method never gets called.

Stumped.

[Kirk Bushell]

So I finally got this working - and I couldn't find in the docs where this was actually mentioned - but in order to get toJSON working correctly with virtuals, it seems that both toObject and toJSON needs to be defined as part of the settings of the Schema.