Mongoose API get nested items in array by _id - node.js

Question

I am building an api with Express and Mongoose (Backbone on the front). I have a Mongoose User model that contains an array called "orders". I need to set up a create method that will READ a Single Order by ID.
When I navigate to:
http://localhost:3000/test/
I get the following for a logged in user:
{
"__v": 0,
"_id": "537d09a1fe47a00000c54514",
"kittenType": "Grumpy",
"local": {
"petname": "Smeagol",
"password": "$2a$08$X4sF5UmYZ3/2cxfRzpPcq.pphYFRKcb.6xBGupdUyUMgWJlFSr/uq",
"email": "julie#gmail.com"
},
"orders": [
{
"title": "Big Max Fountain",
"description": "Large capacity drinking fountain",
"quantity": "2",
"price": 500,
"_id": "53837e9e681808e6ea9f9ca4",
"modified": "2014-05-28T23:49:10.232Z"
},
{
"title": "Lotus Fountain",
"description": "Tranquil pools of water",
"quantity": "1",
"price": 1000,
"_id": "53867762ff514df026b608fa",
"modified": "2014-05-28T23:55:16.263Z"
}
]
}
When I navigate to:
http://localhost:3000/test/orders
I send the list of orders for the logged in user (this gives me the array of orders:
app.get('/test/orders', function(req, res) {
User.findOne({'_id': req.user.id }, function(err, user) {
if (err)
return done(err);
if (user) {
res.send(user.orders);
}
});
});
How do I then send each order by id?
app.get('/test/orders/:id', function(req, res) {
User.findOne({'_id': req.user.id }, function(err, user) {
if (err)
return done(err);
if (user) {
//send the order by id here thru the url
}
});
});
ADDED AFTER RESPONSE:
var userSchema = mongoose.Schema({
user : {
type: mongoose.Schema.ObjectId,
ref: 'User'
},
orders: [{
title: String,
description: String,
quantity : String,
price : Number,
modified: { type: Date, default: Date.now }
}],
signup: [{
name: String,
courseDay: String,
time: String,
location: String,
modified: { type: Date, default: Date.now }
}],
kittenType : String,
profilePhoto : String,
profilePage : String,
local : {
email : String,
password : String,
petname : String,
path : String,
}
routes:
app.get('/test', function(req,res) {
res.send(res.locals.user);
});
app.get('/test/orders', function(req, res) {
User.findOne({'_id': req.user.id }, function(err, user) {
if (err)
return done(err);
if (user) {
res.send(user.orders);
}
});
});
app.post('/api/orders', isLoggedIn, function (req, res){
User.findOne({'_id': req.user.id }, function(err, user) {
if (err)
return done(err);
if (user) {
user.orders.quantity = req.body.quantity;
user.orders.description = req.body.description;
user.orders.title = req.body.title;
user.orders.price = req.body.price;
user.orders.modified = req.body.modified;
user.update({$push: { "orders" :
{ title: user.orders.title,
description: user.orders.description,
quantity: user.orders.quantity,
price: user.orders.price,
modified: user.orders.modified
}
}},{safe:true, upsert:true},function(err){
if(err){
console.log(err);
} else{
console.log("Successfully added" + user.orders);
}
});
console.log('located a user');
}
});
});
WORKING GET METHOD:
app.get('/test/orders/:id', function(req, res) {
User.findOne({'_id': req.user.id }, function(err, user) {
if (err)
return done(err);
if (user) {
console.log(user.orders);
var order = user.orders.filter(function(e){ return e._id == req.params.id })[0]
console.log(order);
res.send(order);
}
});
});

Answer 1

I think you don't need to find a user in this case. Enough to find Order with proper condition:
app.get('/test/orders/:id', function(req, res) {
Order.findOne({'_id': req.params.id, 'user_id': req.user.id }, function(err, order) {
if (err)
return done(err);
if (order) {
res.send(order);
}
});
});
But you should log req to be sure that you use proper ids. It depends also on your routes, that you didn't public.
Or if you need to find User model, you can simply use filter method. Code will be almost the same as in first method:
app.get('/test/orders/:id', function(req, res) {
User.findOne({'_id': req.user.id }, function(err, user) {
if (err)
return done(err);
if (user) {
console.log(user.orders); // returns an array
// console.log(req.id); // to be sure that it returns proper order id
// perhaps it could be next
console.log(req.params.id);
var order_id = user.orders.filter(function(e){ return e == req.params.id })[0]
// then find this order
Order.findOne({'_id': order_id }, function(err1, order) {
if (err1)
return done(err1);
if (order) {
res.send(order);
}
});
}
});
});