observe
Enables you to listen for changes that occur in relation to a document, and to signal when you are ready for the live query to deliver the next event. This won't subscribe to receive changes made remotely by others and so it will only fire updates when a local change is made. If you want to receive remotely performed updates as well then use observeWithNextSignal or also call subscribe separately after another findByID call that references the same document ID. The returned DittoLiveQuery object must be kept in scope for as long as you want the provided eventHandler to be called when an update occurs.
Return
a DittoLiveQuery object that must be kept in scope for as long as you want to keep receiving updates.
Parameters
a closure that will be called every time there is a transaction committed to the store that involves a modification to the document with the relevant ID in the collection that observeLocal was called on.
Enables you to listen for changes that occur in relation to a document, and to signal when you are ready for the live query to deliver the next event. This won't subscribe to receive changes made remotely by others and so it will only fire updates when a local change is made. If you want to receive remotely performed updates as well then use observeWithNextSignal or also call subscribe separately after another findByID call that references the same document ID. The returned DittoLiveQuery object must be kept in scope for as long as you want the provided eventHandler to be called when an update occurs.
Return
a DittoLiveQuery object that must be kept in scope for as long as you want to keep receiving updates.
Parameters
an object that implements the DittoSingleDocumentLiveQueryWithNextSignalCallback interface, whose update function will be called every time there is a transaction committed to the store that involves a modification to the document with the relevant ID in the collection that observeLocal was called on.