Updating Single Object

Using Untyped ObjectsCustom Class/Function

// The objectId property is required - without it the API will be creating a new object
Backendless.Data.of( "TABLE-NAME" ).save( { objectId:"MUST-BE-A-VALID-VALUE",
                                            propertyA:"", 
                                            propertyB:""} )
 .then( function( savedObject ) {
  })
 .catch( function( error ) {
  });

function DataTypeX() {
  // The objectId property is required - without it the API will be creating a new object
  this.objectId = "MUST-BE-A-VALID-VALUE";
  this.propertyA = "";
  this.propertyB = "";
}
Backendless.Data.of( DataTypeX ).save( new DataTypeX() )
 .then( function( savedObject ) {
  })
 .catch( function( error ) {
  });

where:

Argument	Description
DataTypeX	function/class identifying the table where the object will be updated. Method argument must be an instance of the class.
"TABLE-NAME"	name of the table where the object will be updated.

Return Value

Returns updated object.

Example

Using Untyped ObjectsCustom Class/Function

// to update an existing object, it must have the "objectId"
// property with a value assigned by Backendless
var contact = {
    objectId:"XXXX-XXXX-XXXX-XXXXX",
    name:"Jack Daniels",
    age:147,
    phone:"777-777-777",
    title:"Favorites"
}

Backendless.Data.of( "Contact" ).save( contact )
  .then( function( savedObject ) {
      console.log( "Contact instance has been updated" );
    })
  .catch( function( error ) {
      console.log( "an error has occurred " + error.message );
    });

Consider the following class:

function Contact(args) {
    args = args || {};
    this.name = args.name || "";
    this.age = args.age || "";
    this.phone = args.phone || "";
    this.title = args.title || "";
}

The following code updates a Contact object:

// do not forget to initialize the app with Backendless.initApp( appId, jsAPIKey );

// to update an existing object, it must have the "objectId"
// property with a value assigned by Backendless
var contactObject = new Contact( {
    objectId: "XXXXX-XXXXX-XXXXXX-XXXXX",
    name: "James Bond",
    age: 45,
    phone: "1-800-JAMESBOND",
    title: "chief spying officer"
});

Backendless.Data.of( Contact ).save( contact )
  .then( function( savedObject ) {
      console.log( "Contact object has been updated" );
    })
  .catch( function( error ) {
      console.log( "an error has occurred " + error.message );
    });