MongoDB Not Finding Data : returns undefined - mongodb

Question

I have a datamodel named 'account' that stores a 'user'
var mongoose=require("mongoose");
mongoose.connect("mongodb://localhost/dataseed");
var db=mongoose.connection;
var accountSchema=mongoose.Schema({
user:{
type:mongoose.Schema.Types.ObjectId,
ref:"user"
},
accountholder:{
type:String
},
cvv:{
type:String
},
expiryyear:{
type:String
},
expirymonth:{
type:String
},
accountnumber:{
type:Number
},
currentamount:{
type:Number
},
transferedamount:{
type:Number
},
withdrawnamount:{
type:Number
}
});
var account = module.exports = mongoose.model('account', accountSchema);
When I'm trying to found an account using the account.find() function. However it returns undefined when I try to access account.accountnumber
I'm querying my model as follows:
data.findById({"_id":req.params.id},function(err,data){
console.log("DATA.USER --------------------------------------------------");
console.log(data.user);
if(err)console.log(err);
else{
acessToken.create({user:req.user,data:req.params.id,token:token},function(err,acess){
if(err)console.log(err);
else{
console.log("ACCESSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSss");
console.log(acess.user);
transporter.sendMail(mailOptions, function(error, info){
if (error) {
console.log(error);
}
else
{
console.log("------------------------------------------------------------------------------------TYPE OF USER ID: " + typeof(req.user._id));
account.find({"user":req.user},function(err,d){
if(err)console.log(err)
var amount=d.currentamount-data.price;
var transferedamount=d.transferedamount+data.price;
console.log("Amount: "+amount); // NaN
account.findByIdAndUpdate({user:req.user},{currentamount:amount,transferedamount:transferedamount},function(err,update){
if(err)console.log(err);
console.log('Email sent: ' + info.response);
//getUsername of seller
// console.log(data.user)
user.findById({"_id":data.user},function(err,seller){
if(err){
console.log(err);
}else{
var buyer = req.user.username;
var seller = seller.username;
var priceOfData = data.price;
//ccNumber undefined
var ccnumber = d.accountnumber;
console.log("Buyer Name " +buyer);
console.log("Seller Name " +seller);
console.log("Price " +priceOfData);
console.log("Purchased on Credit Card Number " +ccnumber);
res.render('buyer/sold.ejs');
}
});
});
});
}
});
}
});
}
});
Models "data" and "acessToken" are used for finding a product and generating an access token of the purchased product.
This is the output im getting on my console.
5ca9ae4c044bab18588edf5b
ACCESSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSss
5cd4cc83c3c65514c61ae4f3
------------------------------------------------------------------------------------TYPE OF USER ID: object
Amount: NaN
{ CastError: Cast to ObjectId failed for value "{ user: 5cd4cc83c3c65514c61ae4f3 }" at path "_id" for model "account"
at MongooseError.CastError (/home/ubuntu/workspace/DataSeed/node_modules/mongoose/lib/error/cast.js:29:11)
at ObjectId.cast (/home/ubuntu/workspace/DataSeed/node_modules/mongoose/lib/schema/objectid.js:232:11)
at ObjectId.SchemaType.applySetters (/home/ubuntu/workspace/DataSeed/node_modules/mongoose/lib/schematype.js:845:12)
at ObjectId.SchemaType._castForQuery (/home/ubuntu/workspace/DataSeed/node_modules/mongoose/lib/schematype.js:1248:15)
at ObjectId.SchemaType.castForQuery (/home/ubuntu/workspace/DataSeed/node_modules/mongoose/lib/schematype.js:1238:15)
at ObjectId.SchemaType.castForQueryWrapper (/home/ubuntu/workspace/DataSeed/node_modules/mongoose/lib/schematype.js:1217:15)
at cast (/home/ubuntu/workspace/DataSeed/node_modules/mongoose/lib/cast.js:252:34)
at Query.cast (/home/ubuntu/workspace/DataSeed/node_modules/mongoose/lib/query.js:4334:12)
at castQuery (/home/ubuntu/workspace/DataSeed/node_modules/mongoose/lib/query.js:4186:18)
at Query._findAndModify (/home/ubuntu/workspace/DataSeed/node_modules/mongoose/lib/query.js:3203:23)
at Query.<anonymous> (/home/ubuntu/workspace/DataSeed/node_modules/mongoose/lib/query.js:2830:8)
at Query._wrappedThunk [as _findOneAndUpdate] (/home/ubuntu/workspace/DataSeed/node_modules/mongoose/lib/helpers/query/wrapThunk.js:16:8)
at process.nextTick (/home/ubuntu/workspace/DataSeed/node_modules/kareem/index.js:369:33)
at _combinedTickCallback (internal/process/next_tick.js:73:7)
at process._tickCallback (internal/process/next_tick.js:104:9)
message: 'Cast to ObjectId failed for value "{ user: 5cd4cc83c3c65514c61ae4f3 }" at path "_id" for model "account"',
name: 'CastError',
stringValue: '"{ user: 5cd4cc83c3c65514c61ae4f3 }"',
kind: 'ObjectId',
value: { user: 5cd4cc83c3c65514c61ae4f3 },
path: '_id',
reason: undefined,
model:
{ [Function: model]
hooks: Kareem { _pres: [Object], _posts: [Object] },
base:
Mongoose {
connections: [Object],
models: [Object],
modelSchemas: [Object],
options: [Object],
_pluralize: [Function: pluralize],
Schema: [Object],
model: [Function],
plugins: [Object] },
modelName: 'account',
model: [Function: model],
db:
NativeConnection {
base: [Object],
collections: [Object],
models: [Object],
config: [Object],
replica: false,
options: null,
otherDbs: [],
relatedDbs: {},
states: [Object],
_readyState: 1,
_closeCalled: false,
_hasOpened: true,
'$internalEmitter': [Object],
_listening: false,
_events: [Object],
_eventsCount: 1,
_connectionOptions: [Object],
name: 'dataseed',
host: 'localhost',
port: 27017,
user: undefined,
pass: undefined,
client: [Object],
'$initialConnection': [Object],
db: [Object] },
discriminators: undefined,
events:
EventEmitter {
domain: null,
_events: {},
_eventsCount: 0,
_maxListeners: undefined },
'$appliedMethods': true,
'$appliedHooks': true,
_middleware: Kareem { _pres: [Object], _posts: [Object] },
schema:
Schema {
obj: [Object],
paths: [Object],
aliases: {},
subpaths: {},
virtuals: [Object],
singleNestedPaths: {},
nested: {},
inherits: {},
callQueue: [],
_indexes: [],
methods: {},
methodOptions: {},
statics: {},
tree: [Object],
query: {},
childSchemas: [],
plugins: [Object],
'$id': 7,
s: [Object],
_userProvidedOptions: {},
options: [Object],
'$globalPluginsApplied': true,
_requiredpaths: [] },
collection:
NativeCollection {
collection: [Object],
opts: [Object],
name: 'accounts',
collectionName: 'accounts',
conn: [Object],
queue: [],
buffer: false,
emitter: [Object] },
Query: { [Function] base: [Object] },
'$__insertMany': [Function],
'$init': Promise { [Object] },
'$caught': true } }
Email sent: 250 2.0.0 OK 1557500841 d4sm5108746wrv.42 - gsmtp
Buyer Name murtaza1
Seller Name test1
Price 100
Purchased on Credit Card Number undefined

Answer 1

The problem with your code is that when you query your database you also need to call the populate method exposed by MongoDB and in particular Mongoose which I'm assuming you're using to query the DB. More info on Mongoose docs.
Why this happens? Well, since you're declaring using as a reference to your account Schema when Mongoose query the DB it only returns, without the populate method, the ID of the document referenced by that particular account Schema. Hope this helps you, cheers, sigfried