How to work with many to few mongodb relationship with feathersjs? - mongodb

Question

I have two models, with a many-to-few relationship, that I'm modelling as follows:
// Portfolio
const portfoliosSchema = new Schema({
name: { type: String, required: true },
description: { type: String },
user: { type: Schema.Types.ObjectId, ref: 'User', required: true },
positions: [{
stock: { type: Schema.Types.ObjectId, ref: 'Stock', required: true },
cost: number,
amount: number,
}]
});
// Stock
const stocksSchema = new Schema({
exchange: { type: String, required: true },
symbol: { type: String, required: true },
company: { type: String },
description: { type: String }
});
Without writing a custom service / in a feathers friendly way, how would I:
Query portfolios and populate the relevant records from the stocks
collection
Simplify insert/updates to the nested positions within the portfolio schema (ie without updating the entire record)
Is this supported / should I write a custom service and/or normalize the relationship?
Edit - Solved #1 the first issue of getting extra data using a before hook:
function(hook) {
const query = hook.params.query;
hook.params.query = Object.assign({},query,{
$populate: {
path: 'positions.stock',
select: 'exchange symbol'
}
});
}

Answer 1

Sample of populate code, adjust to your needs:
Portfolio.find({ some: 'params' })
.populate({ path: 'stock', select: 'name -_id' })
.exec((err, portfolios) => {
res.json({ portfolio: portfolios });
});
Updating a nested array item:
Position.update({ 'position._id': 'h43q9h94945d948jh098j6h0' }, {
'$set': { 'position.$.whatever': 'your-updated-stuff' }
}, err => {
if (err) return console.log(err));
res.json({ success: true });
});