This example shows another variation of the Dog aggregate class used in the tutorial and module docs.
In contrast with the previous examples, this example does not use the library Aggregate class. Instead, it defines its own Aggregate and DomainEvent base classes. Similar to the previous examples, the Aggregate class is a normal (mutable) Python class and the DomainEvent class is a frozen Python dataclass. A projector() class method is defined on the Aggregate class.
The aggregate event classes are explicitly defined, and the command method bodies explicitly trigger events. Like the previous example, this example uses a separate function to apply events to the current aggregate state.
As in the previous example, the application code simply uses the aggregate class as if it were a normal Python object class. However, the aggregate projector function must be supplied when getting an aggregate from the repository and when taking snapshots.
../../../eventsourcing/examples/aggregate4/domainmodel.py
../../../eventsourcing/examples/aggregate4/application.py
../../../eventsourcing/examples/aggregate4/test_application.py