To help target specific devices or users for a notification, we have Tags, Named Users and Tag Groups.
Tags allow you to attribute arbitrary metadata to a specific device. Common examples include favorites such as sports teams or news story categories.
// Set tags UrbanAirship.tags = ["some-tag", "other-tag"];
Named Users allow you to associate multiple devices to a single user or profile that may be associated with more than one device, e.g., an end-user's Android phone and tablet. A device can have only one Named User, and a single Named User should not be associated with more than 50 devices.
UrbanAirship.namedUser = "coolNamedUserId";
By default, Named Users cannot be associated from the device. In this case if the devices attempts a Named User association, the association will fail and the plugin will log an error. In order to change this setting, go to Settings » APIs & Integrations » Named Users.
Associating the channel with a Named User ID, will implicitly disassociate the channel from the previously associated Named User ID, if it existed.
Airship Channel IDs
The Channel ID is a unique identifier that ties together an application/device pair on a mobile device. The Channel ID is used to target pushes to specific devices using the Airship API. Once a Channel ID is created, it will persist in the application. It may or may not change when the application is reinstalled. For more information on platform-specific operation, see the Android and iOS documentation.
Don't worry if this value initially comes back as null on your app's first run (or after clearing the application data), as the Channel ID will be created and persisted during registration. To receive an event when the Channel ID is created, see Listening for Events.
var channelId = UrbanAirship.channelId;