Updating Multiple Objects¶
This API updates multiple objects in a data table with a single request. Consider the following example, it demonstrates an API call which updates all objects in the Person
data table where the value of the property age
is greater than 20
. As a result of the request, all updated objects will have the contactType
property set to "personal"
:
Map changes = {"contactType": "personal"}; Backendless.data.of("Person").update("age > 20", changes).then((objectsUpdated) { print("Server has updated $objectsUpdated objects"); });
Method¶
Future<int> Backendless.data.of("TABLE-NAME").update(String whereClause, Map changes);
Future<int> Backendless.data.withClass<E>().update(String whereClause, Map changes);
where:
Argument | Description |
---|---|
TABLE-NAME |
Name of the table where the objects expressed via java.util.Map instances will be updated. |
E |
Java class of the data objects to update in the database. |
whereClause |
A condition for selecting objects in the data table which will be updated. |
changes |
An instance of java.util.Map containing the changes which will be applied to all objects in the data table which match the condition expressed via whereClause . |
Return Value¶
The method returns the number of objects updated in the database.