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Editorial Team
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Asked: 2026-05-28T11:13:22+00:00

Is it possible to get DynamoDB to automatically generate unique IDs when adding new

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Is it possible to get DynamoDB to automatically generate unique IDs when adding new items to a table?

I noticed the Java API mentions @DynamoDBAutoGeneratedKey so I’m assuming there’s a way to get this working with PHP as well.

If so, does the application code generate these IDs or is it done on the DynamoDB side?

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  1. Editorial Team

    Good question – while conceptually possible, this seems not currently available as a DynamoDB API level feature, insofar neither CreateTable nor PutItem refer to such a functionality.

    The @DynamoDBAutoGeneratedKey notation you have noticed is a Java annotation, i.e. syntactic sugar offered by the Java SDK indeed:

    An annotation, in the Java computer programming language, is a special
    form of syntactic metadata that can be added to Java source code.

    As such @DynamoDBAutoGeneratedKey is one of the Amazon DynamoDB Annotations offered as part of the Object Persistence Model within the Java SDK’s high-level API (see Using the Object Persistence Model with Amazon DynamoDB):

    Marks a hash key or range key property as being auto-generated. The
    Object Persistence Model will generate a random UUID when saving these
    attributes. Only String properties can be marked as auto-generated
    keys.

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