Mongoose Populate Empty Array - node.js

Question

const Schema = mongoose.Schema
const logEntry = new Schema({
no:{
type: Number
},
type: {
type: String
},
createdAt: {
type: Date,
default: Date.new
},
ingredients: {
type: String
},
process: {
type: String
},
cook: [{
type: mongoose.Schema.Types.ObjectId, ref: 'shef'
}]
});
const shefEntry = new Schema({
name: {
type: String
},
dish: {
type: mongoose.Schema.Types.ObjectId, ref: 'logDetails'
}
})
const foodItem = mongoose.model('logDetails', logEntry);
const Cook = mongoose.model('shef', shefEntry);
This is my Schema.
app.route('/log_entries')
.get(controller.index)
.post(controller.create)
This is my route.
exports.index = function(req, res){
logEntry.find({})
.populate('Cook')
.exec(function(err, logEntry){
if(err) res.send(err);
res.json(logEntry);
})
}
This is my controller where I'm trying to populate. My requirement is to populate the name of cook into recipe collection but I get the result as
{
"cook": [],
"_id": "5dafdbd8b9cefa2670ab73c7",
"no": 101,
"type": "Non-Veg",
"ingredients": "Gobi,Paneer",
"process": "Go on with the manual",
"__v": 0
},
{
"cook": [],
"_id": "5dbb76bf5356143124d3afbd",
"no": 101,
"type": "veg",
"ingredients": "Gobi,Paneer",
"process": "Go on with the manual",
"__v": 0
}
Can anyone explain how to use mongoose populate? I mean about how to join 2 collections and which collection to make main collection. Also refer me with some good website where I can learn more about mongoose join.

Answer 1

Cook replace with cook
exports.index = function(req, res){
logEntry.find({})
.populate('cook')
.exec(function(err, logEntry){
if(err) res.send(err);
res.json(logEntry);
}) }