No method in multimethod 'coerce-to-ktable' when building topology about willa HOT 2 CLOSED

@pdmct I think Willa is behaving as designed, but the readme is unclear and perhaps the API could be improved. In this example, the input-topic is treated as a KStream, which is grouped and windowed into a TimeWindowedKStream. To sink this to a topic, you also need to aggregate it, so you need to add the :willa.core/aggregate-adder-fn and :willa.core/aggregate-initial-value keys.

What would you expect the output on output-topic to be in this case? Would you expect the records in each window be grouped into a vector?

from willa.

I've updated the readme to make this behaviour more explicit, and I've also updated the specs in version 0.1.2

from willa.