How to use ReturnValuesOnConditionCheckFailure in the .NET SDK?

[psh9508]

I have searched for a feature called ReturnValuesOnConditionCheckFailure in DynamoDB.

I want to use it to determine whether the ConditionalCheckFailedException is caused by a condition check or optimistic locking.

I have tried to find out how to use it in the .NET SDK, but I'm not sure if it can be used in the .NET SDK yet.

Could you please let me know how to use it in the .NET SDK with optimistic locking?

Thank you.

[dscpinheiro]

It's available in the .NET SDK, but you need to update the DynamoDBv2 package to at least version 3.7.105.0 (that's when the new parameter was added):

using Amazon.DynamoDBv2.Model;

// Also available in UpdateItem, DeleteItem, ExecuteStatement, BatchExecuteStatement and ExecuteTransaction APIs.
var request = new PutItemRequest
{
    ReturnValuesOnConditionCheckFailure = ReturnValuesOnConditionCheckFailure.ALL_OLD
};

I don't believe we have a sample in C#, but this blog post has examples in Python and the APIs (like I mentioned above) are available in .NET as well: https://aws.amazon.com/blogs/database/handle-conditional-write-errors-in-high-concurrency-scenarios-with-amazon-dynamodb/

[github-actions[bot]]

Hello! Reopening this discussion to make it searchable.