DynamoDB conditions: Missing `attribute_not_exists`?

aristidb / aws

Amazon Web Services for Haskell

BSD 3-Clause "New" or "Revised" License

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Open nomeata opened 4 years ago

nomeata commented 4 years ago

I am trying to write a PutEvent that checks that the item does not already exist, as per https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.ConditionExpressions.html#Expressions.ConditionExpressions.PreventingOverwrites, but it seems that attribute_not_exists is missing from CondOp?

aristidb commented 4 years ago

Happy to take a PR that adds it! :)

nomeata commented 4 years ago

Still a very early user of DynamoDB and aws here… maybe some other time when I feel more confident :-)