Updating Single Object¶
Method¶
Future<Map> Backendless.data.of("TABLE-NAME").save(Map entity);
Future<E> Backendless.data.withClass<E>().save(E entity);
where:
Argument | Description |
---|---|
TABLE-NAME |
Name of the table where the object represented by Map will be updated. There must be objectId property in the map. The value of the property identifies the object which will be updated. |
E |
Dart class of the data object to update. |
entity |
Dart object to persist, must be of type E or Map (depending on the method used). |
Return Value¶
The updated object of type E or Map.
Example¶
¶
void updateContact() { // create new contact object first. Then we will update it. Map contact = { "name": "Jack Daniels", "age": 147, "phone": "777-777-777", "title": "Favorites", }; Backendless.data.of("Contact").save(contact).then((savedContact) { savedContact["title"] = "Most favorite"; savedContact["phone"] = "666-666-666"; Backendless.data.of("Contact").save(savedContact).then((response) { // Contact object has been updated }); }); }
Consider the following class:
The following code saves a new instance of the Contact class and subsequently updates it:
import 'package:backendless_sdk/backendless_sdk.dart'; @reflector class Contact { String objectId; String name; int age; String phone; String title; }
void updateContact() { Contact contact = Contact() ..name = "Jack Daniels" ..age = 147 ..phone = "777-777-777" ..title = "Favorites"; Backendless.data.withClass<Contact>().save(contact).then((savedContact) { // now update the saved object savedContact.title = "Most favorite"; savedContact.phone = "666-666-666"; Backendless.data.withClass<Contact>().save(savedContact).then((response) { // Contact instance has been updated }); }); }