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Comments (5)

Papipo avatar Papipo commented on April 28, 2024

What about using pattern matching?

def execute(state, %OpenAccount{} = command) do
[...]
end

This forces commands to be defined. There might be a mismatch between the CamelCase command and the snake_case function name.

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slashdotdash avatar slashdotdash commented on April 28, 2024

@Papipo I've updated the issue to use execute/2 as the default function name.

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slashdotdash avatar slashdotdash commented on April 28, 2024

Fixed by #35.

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brendanzab avatar brendanzab commented on April 28, 2024

What is the purpose of command handlers if they can just be implemented with pattern matching and exectute/2?

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slashdotdash avatar slashdotdash commented on April 28, 2024

@brendanzab By default you can route commands directly to the aggregate and use pattern matching on its execute function.

I like to keep my aggregate functions pure. Therefore, if I need to pull in external data (e.g. third party system, read model projection) I do this in a command handler. Then pass this additional data to the aggregate.

You don't need to use command handlers if you prefer not.

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