Develop Reference

How To Push mutiple array elements into mongod by mongoose

There is a mongodb Schema which include these field, its type is array
......
orderlist: [
{
id: String,
price: Number,
photo: String,
name: String,
num: Number
}
]
......
The frontend post me the data such as this,this array has lots of array elements
goodslist:[
{
goodsid: '10001',
goodsprice: 20,
goodsphoto: '/goodsimg/upload_1843.jpg',
goodsname: 'goods1',
goodsnum: 2
},
{
goodsid: '10002',
goodsprice: 30,
goodsphoto: '/goodsimg/upload_1845.jpg',
goodsname: 'goods2',
goodsnum: 4
},
........(etc)
]
what can I do to push this 'goodslist' data into 'orderlist' field by mongoose without changing mongodb field, thanks

You must use mongoose virtuals to achieve this issue.
Your schema must like this:
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const collectionName = 'orderlist';
const OrderSchema = new Schema({
id: String,
price: Number,
photo: String,
name: String,
num: Number
}, { minimize: false });
const OrderlistSchema = new Schema({
orderList: [OrderSchema]
}, { minimize: false, toJSON: { virtuals: true } });
OrderlistSchema.virtual('goodslist').
get(function () {
return this.orderList.map(order => ({
goodsid: order.id,
goodsprice: order.price,
goodsphoto: order.photo,
goodsname: order.name,
goodsnum: order.num
}))
}).
set(function (v) {
this.set({
orderList: v.map(good => ({
id: good.goodsid,
price: good.goodsprice,
photo: good.goodsphoto,
name: good.goodsname,
num: good.goodsnum
}))
});
});
module.exports = mongoose.model('Orderlist', OrderlistSchema, collectionName);
goodslist is virtual field here.
With this schema, you can set order field with your format without changing anything in mongodb.
Example posting document:
{
"goodslist": [
{
"goodsid": 2,
"goodsprice": 200,
"goodsphoto": "photo2",
"goodsname": "name2",
"goodsnum": 1234
}
]
}
you can also get order data in goodlist format
{
"_id": "5e9d8c0e27c7a813840c9ff0",
"orderList": [
{
"_id": "5e9d8c0e27c7a813840c9ff1",
"id": "2",
"price": 200,
"photo": "photo2",
"name": "name2",
"num": 1234
}
],
"__v": 0,
"goodslist": [
{
"goodsid": "2",
"goodsprice": 200,
"goodsphoto": "photo2",
"goodsname": "name2",
"goodsnum": 1234
}
],
"id": "5e9d8c0e27c7a813840c9ff0"
}

It going to be something like the following:
//Update order | create if does not exist
orderDB.updateOne({ _id: 'xxxx' }, {
//Push the list into order array
$push: {
orderlist: [{
id: goodlist[0][0],
price: goodlist[0][1],
photo: goodlist[0][2],
name: goodlist[0][3],
num: goodlist[0][4],
}]
}
//Upsert => update / create
}, { upsert: true })
However, you might need to loop through the goodslist.

How to remove everything underneath a key from a JSON object

I have a JSON (All under req.body) in the format
{body :
{ Cust : {...} },
{ Input : {...} },
{ Reciept : {image: [Array] } }
}
I want to be able to remove all the key Reciept so the new JSON would look like ...
{body :
{ Cust : {...} },
{ Input : {...} }
}
I've tried to use delete req.body.Reciept and delete req.body.Reciept.image
Both are unable to change the JSON for me.
What should I be doing?
edit:
When I console log req.body this is what I get :
{ body:
{ CustData:
{ customer: 'T',
address1: '',
address2: '',
billing: '',
signature: [Object] },
InputData:
{ InputDate: '2019-10-21 23:25:28',
Workers: [],
Equipment: [],
Purchases: [] },
Reciept: { image: [Array] } } }
I haven't found a solution because I have a JSON and then an array as a value for a key. I am simply trying to remove the whole Reciept key and everything attached to it.
Here is what is I am running
console.log(req.body);
delete req.body.Receipt;
console.log(req.body);
Here is what I get returned in the terminal
{ body:
{ CustData:
{ customer: 'Test',
address1: '',
address2: '',
billing: '',
signature: [Object] },
InputData:
{ InputDate: '2019-10-22 0:9:33',
Workers: [],
Equipment: [],
Purchases: [] },
Receipt: { image: [Array] } } }
//followed by
{ body:
{ CustData:
{ customer: 'Test',
address1: '',
address2: '',
billing: '',
signature: [Object] },
InputData:
{ InputDate: '2019-10-22 0:9:33',
Workers: [],
Equipment: [],
Purchases: [] },
Receipt: { image: [Array] } } }

JSON-> javascript object notation. It is just an object with key and value .Ntg else. Treat is as object nothing more specific than that. you have clearly one object which holds key as body and data is object which have nested key and value pair.
Since the JSON format is text only, it can easily be sent to and from a server, and used as a data format by any programming language.
JavaScript has a built in function to convert a string, written in JSON format, into native JavaScript objects:
JSON.parse()
So, if you receive data from a server, in JSON format, you can use it like any other JavaScript object.Hope this will clear you concept of json.
delete request.body.Reciept; It is working.

Storing data from JSON object received from Google People Api

So I have a server that receives data from Google People api regarding contacts and my received object has the following structure:
{ connections:
[ { resourceName: 'people/c3904925882068251400',
etag: '%EgYBAgkLNy4aDQECAwQFBgcICQoLDA0iDFZUOUE0NkRBZW0wPQ==',
names:
[ { metadata: { primary: true, source: [Object] },
displayName: 'Mihai Vrincut',
familyName: 'Vrincut',
givenName: 'Mihai',
displayNameLastFirst: 'Vrincut, Mihai' },
{ metadata: { source: [Object] },
displayName: 'Mihai Vrincut',
familyName: 'Vrincut',
givenName: 'Mihai',
displayNameLastFirst: 'Vrincut, Mihai' } ],
emailAddresses:
[ { metadata: { primary: true, source: [Object] },
value: 'mihai.vrincut#gmail.com' } ] },
{ resourceName: 'people/c3275206487406036814',
etag: '%EgYBAgkLNy4aDQECAwQFBgcICQoLDA0iDHBFVzBUMm8wWU5nPQ==',
names:
[ { metadata: { primary: true, source: [Object] },
displayName: 'aaaaaaaaa',
givenName: 'aaaaaaaaa',
displayNameLastFirst: 'aaaaaaaaa' } ] },
{ resourceName: 'people/c5777943907795350059',
etag: '%EgYBAgkLNy4aDQECAwQFBgcICQoLDA0iDGxOeGYwblg3bFUwPQ==',
names:
[ { metadata: { primary: true, source: [Object] },
displayName: 'costin',
givenName: 'costin',
phoneticFamilyName: 'cancius',
phoneticGivenName: 'costin',
displayNameLastFirst: 'costin' } ],
emailAddresses: [ { metadata: { primary: true, source: [Object] }, value: 'hj' } ],
phoneNumbers:
[ { metadata: { primary: true, source: [Object] },
value: '07543532512',
canonicalForm: '+40754353251' } ] } ], totalPeople: 3}totalItems: 3 }
In order to get this object I used the util.inspect() method. However, when I try to access the names for example, I get undefined:
var response=util.inspect(responses,{depth:5});
Console.log(response.connections[0].names);
What is wrong?

So, given the situation, and the information you've given over the comment sections.
I assume that responses is already an object, but util.inspect, makes it a string with a JSON kind of syntax but without the quotes (") before and after the names of the keys. That's why you get
{ connections: ^ SyntaxError: Unexpected token c in JSON at position 2
So, try going over the responses object.
console.log(responses)
And get the name of the keys. With them
console.log(responses.sth.sthElse.anotherSth.anotherSthElse.lastSth.connections)
And see if you get the expected result :)

You should convert the response to JSON Object.
try this:
console.log(JSON.parse(response).connections[0].names);
(I am assuming you are working in Javascript)

What I would do is validate if the answer is a String, you have a
console.log (typeof response)
if it is a string, convert it to JSON:
let responseObject = JSON.parse (response);
Finally, try if you can access the object:
console.log (responseObject.connections [0] .names);
You tell me your answer :)

How to iterate thru multiple values in a single key in mongoose

I have a web app which uses MongoDB as database and I'm trying to iterate thru multiple values inside a single property named passport.
This is my schema:
var EmployeeDBSchema = new Schema({
/* Passport tab schema */
passportInfo: {
passportDetails: []
},
And here's how it looks in Robomongo:
I tried checking if this can be retrieved as an array, so I did below:
console.log(_.map(results, _.property('passportInfo')));
passportArr = _.map(results, _.property('passportInfo'));
console.log("is passport array? " + _.isArray(passportArr));
Result:
Now since it was positive, I tried iterating thru it like a normal array using the ff. code:
_.forEach(passportArr, function (value, key) {
_.forEach(passportArr[key], function(value2, key2){
console.log(key2 + " >> " + value2);
});
});
However, what I got was this:
How can I get the values of passportExpiry, passportNumber and countryOfOrigin?
I'm really having a hard time over this. Hoping somebody can help.
Thank you.
EDIT: Not sure if this will help but, I got the idea for the structure from this Plunker. Main idea behind Passport was the user can add an unlimited number of passport information (hence the passportInfo array). I'm trying to retrieve the data here so I can render it as a CSV file.
UPDATE:
Here's the expanded results as requested (from console.log):
full results
[ { _id: dummyiddontmind123,
employeeID: '123asd12',
desiredRoleOther: 'Other role',
desiredRole3: 'Role 3',
desiredRole2: 'Role 2',
desiredRole1: 'The Role',
isOpenToIntlAssignment: 'Y',
employeeName: 'Jane Doe',
yrsInIT: 1,
visaInfo:
[ { visaCountryOfOrigin: [Object],
visaNumber: 'asd',
visaEntry: 'Single',
visaExpiry: '2017-03-16T16:00:00.000Z',
visaStatus: 'expired' } ],
passportInfo:
[ { countryOfOrigin: [Object],
passportNumber: [Object],
passportExpiry: '2017-03-03' },
{ countryOfOrigin: [Object],
passportNumber: [Object],
passportExpiry: '2017-03-08T16:00:00.000Z' },
{ countryOfOrigin: [Object],
passportNumber: [Object],
passportExpiry: '2017-03-10T16:00:00.000Z' } ] } ]
[ [ { passportExpiry: '2017-03-03',
passportNumber: { '0': 'EB1234567' },
countryOfOrigin: { '0': 'Philippines' } },
{ passportExpiry: '2017-03-08T16:00:00.000Z',
passportNumber: { '1': 'AS1234' },
countryOfOrigin: { '1': 'Japan' } },
{ passportExpiry: '2017-03-10T16:00:00.000Z',
passportNumber: { '2': 'AX123' },
countryOfOrigin: { '2': 'Singapore' } } ] ]

Your data inside passportInfo is a bit off, probably due to some copy-paste error after outputting it.
I take it you want to export all stored passport information into a csv of format country; number; expiry.
The first thing you want to make sure is that the actual data and the data you expect are structurally the same. If not, you can still add transformation steps before (e.g. flatten arrays or transform objects from {0: 123} to [123]).
As soon as this is under control, you can start by mapping the objects of employee.passportInfo from a structured object to an array of information necessary for your csv. This happens using Array.prototype.map.
I added another step inside that map to make sure an object of passportInfo.passportNumber of the form {0: 123} is transformed into an array [123]. This array is then used to map to a single line of your csv by adding passportInfo.countryOfOrigin and .passportExpiry.
// The following code snippets only operates on one employee. If you have an array use an iteration function depending on your needs.
const employee = { _id: 123,
employeeID: '123asd12',
desiredRoleOther: 'Other role',
desiredRole3: 'Role 3',
desiredRole2: 'Role 2',
desiredRole1: 'The Role',
isOpenToIntlAssignment: 'Y',
employeeName: 'Jane Doe',
yrsInIT: 1,
visaInfo: [ {
visaCountryOfOrigin: [Object],
visaNumber: 'asd',
visaEntry: 'Single',
visaExpiry: '2017-03-16T16:00:00.000Z',
visaStatus: 'expired' }
],
passportInfo: [ {
countryOfOrigin: 'ABC',
passportNumber: { 0: '123123123' },
passportExpiry: '2017-03-03'
}, {
countryOfOrigin: 'DEF',
passportNumber: { 0: '321321321', 1: '123123123' },
passportExpiry: '2017-03-08T16:00:00.000Z'
}, {
countryOfOrigin: 'GHI',
passportNumber: { 0: '654654654' },
passportExpiry: '2017-03-10T16:00:00.000Z'
} ]
};
const flattenPassportNumbers = numbers =>
Object.keys(numbers).map(key => numbers[key]);
const info = employee.passportInfo.map(({passportNumber, passportExpiry, countryOfOrigin}) =>
flattenPassportNumbers(passportNumber).map(number =>
[countryOfOrigin, number, passportExpiry]
)
);
const flattenLine = ([line]) => line;
const joinLine = (line) => line.join('; ');
const lines = info.map(flattenLine);
console.log(lines.map(joinLine));
console.log(lines.map(joinLine).join('\n'));
If there's something you don't understand, please don't hesitate to ask.

Nested Javascript Object : recursion and "complex" transformation (with lodash)

I apologize in advance for the complex example here; I tried to trim it down as much as I could to illustrate what I try to achieve
I have a complex structure that I need to traverse and transform based on some conditions; Here's an (short) example of the structure that should cover most scenarios:
{ PROP1: {
metadata: Object, // somewhere deeper in metadata I have a `value` key
parent: { $ref: String },
employee: {
parent: { $ref: String },
id: String,
metadata: Object,
products: {
metadata: Object,
model: { $ref: String },
type: 'array',
value: ["String", "String" , "String"] ,
[...]
},
model: {
id: String,
email: {
metadata: Object,
value: 'a#b.com',
type: 'string',
validity: Object,
[...]
},
name: {
firstName: {
metadata: Object,
value: 'John',
type: String,
validity: Object,
[...]
},
lastName: {
metadata: Object,
value: 'Smith',
type: String,
validity: Object,
[...]
},
}
},
operations: {
id: String,
items: [
{ action: {value: "UPDATE", model: {$ref: String }, [...] },
{...}
],
metadata: Object,
[...]
}
}
},
PROP2: {
// similar as PROP1
},
[... and so on ...]
}
I basically need to clean that up before sending it to the backend;
Whenever a value contains $ref, I don't want the key/val pair (e.g.: PROP1.parent is of no use and can be omitted)
whenever a value contains value, I need to omit everything else and move the value of value as the value of key (e.g.: PROP1.employee.products should equal ['String', 'String', 'String'])
keys like id, metadata, validity (etc) can be completely omitted regardless of its content
So the end result should be along those lines:
{ PROP1: {
employee: {
products: ['item','item','item'],
model: {
email: 'a#b.com',
name: { firstName: 'John', lastName: 'Smith'},
},
operations: [
{action: 'UPDATE'}
]
}
},
PROP2: { ... }
}
I tried lots of different approaches using different lodash methods but couldn't wrap my head around this...
Any help will be greatly appreciated
Thanks

In pseudo code, try something like this. Implement the specifics and post more info when you run into trouble.
var ignoreKeyArray = ["id", ...] // keys to ignore and remove
var newJSON = "{}";
for (property in JSON) {
var newProp = parseJSON(key, property);
insert newProp in newJSON object
}
var parseJSON = function (key, jsonBlob) {
if (key in ignoreKeyArray || jsonBlob contains value "$ref")
return "";
var jsonOut = key + ": {}";
for (child in jsonBlob) {
add parseJSON(child) to jsonOut;
}
return jsonOut;
}
If you have any questions, comment so I can extend the answer and clarify.