unmarchal DynamodbEventRecord about aws-lambda-go

[morcmarc]

Hi @cmello,

I think my question is still relevant: could we change the type of NewImage and OldImage (and Keys) to *dynamodb.AttributeValue from *event.DynamoDBAttributeValue? They are virtually the same thing. That way you could just use dynamodbattribute.Unmarshal and the rest of the methods plus you reduced ambiguity?

[morcmarc]

I would like to know this as well. Namely, why do we have two representations of the "same" thing: dynamodb.AttributeValue vs event.DynamoDBAttributeValue. The dynamodb package provides methods for unmarshalling into a struct which is quite handy, however I can't do the same with this package. I cannot even use something like mapstructure, because Map() returns a map with metadata.

[cmello]

Hi @moedeveloper ,

You can use your own struct instead of DynamoDBEvent and customize serialization using the standard “json” key in the field tags. Please see https://golang.org/pkg/encoding/json/#Marshal .

Best regards!

[asuresh8]

Yeah check out the example we have in our tests:

https://github.com/aws/aws-lambda-go/blob/master/events/dynamodb_test.go#L18

[moedeveloper]

i saw it, you unmarchal to dynamoDBEvent, i want to unmarchal for a specific struct or maybe an interface{}

[cmello]

Hi @morcmarc,

Thank you for your comments! dynamodb.AttributeValue is very handy but aws-lambda-go does not require a dependency on aws-sdk-go at this time. Could you please open a separate issue for discussing the options? Thank you very much!