Question: How to implement compound keys (segment my data) about goka HOT 2 CLOSED

Awesome! Happy to hear you're trying goka.

There is no automatic way how do such aggregation (we are still not sure how to implement a time window #99). But you could do the following:

• When a message is received, the processor calls ctx.Loopback("userX.weekY", message).
• Add to DefineGroup a Loop edge with a callback to handle it.

You can also store in the original key userX some bookkeeping information, eg, since which week the user has values. With that you can later do some cleanup by sending into the loopback a cleanup message.

Just remember that if a table have a single type for the values, so if you store in userX one type and userX.weekY another type, you'd actually need to wrap both in another type that can contain one or the other type.

Does that help?

from goka.

@db7 Thanks for the prompt response, I think I originally discounted using loopback due to it requiring the same type, but on second thoughts it's not the end of the world using the structure partially.

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