Add Contact to an existing table with relation

General
1

Hi,I want to add item to existing table ,like in relation’s docs.But I am getting problem.
I will explain on your example.
When I want to add new contact to phone book,my client upload to server all phone book data.
What I am doing wrong?

Here my code


var dataStore_ = Backendless.Persistence.of(MyUser);
var myObject_ = new MyObject(args);
userItem['my_data'].push(myObject_ );
userItem= dataStore_ .save( userItem);
2

Please, try the following example, it`s fully functional. Take a look at attached screenshot with result of code execution.

/* classes */
function PhoneBook(args) {
 args = args || {};
 this.contacts = args.contacts || null; // collection of Contacts
} 


function Contact(args) {
 args = args || {};
 this.___class = 'Contact';
 this.name = args.name || "";
 this.age = args.age || "";
 this.phone = args.phone || "";
 this.title = args.title || "";
}
/* classes */


/* example */
var phoneBookStorage = Backendless.Persistence.of(PhoneBook);


var John = new Contact({
 name: "John",
 age: 27,
 phone: "1-800-MY-APPLE",
 title: "common contact"
});


var contacts = [];


contacts.push(John);


var phoneBook = phoneBookStorage.save(new PhoneBook({contacts: contacts}));
/* example */

Screen Shot 2015-08-11 at 17.40.59.png
Screen Shot 2015-08-11 at 17.40.59.png1357×681 104 KB

3

My case little bit another.

Consider this,in another part of code you want to add another contact to PhoneBook. And you don’t have the previous phoneBookStorage

4

If you want to add ‘Contact’ to ‘PhoneBook’ - you must obtain reference to ‘PhoneBook’.
It may be a javascript instance property or something else, giving you the ability to address ‘PhoneBook’ when needed.

function PhoneBook(args) {
args = args || {};
this.contacts = args.contacts || null;
}

<MyApplicationClass>.phoneBookStorage = Backendless.Persistence.of(PhoneBook);


<MyApplicationClass>. phoneBook = <MyApplicationClass>.phoneBookStorage.save(new PhoneBook());

....

<MyApplicationClass>.phoneBook.contacts.push(new Contact());

<MyApplicationClass>.phoneBookStorage.save(<MyApplicationClass>.phoneBook);
5

Thanks Eugene,it occurred that your first comment was enough to solve my problem.

Thanks