Conditional Update of an Existing Item
A 2-step recipe with Amazon DynamoDB. We can help you get access.
Recipe · 2 steps
Conditional Update of an Existing Item
with Amazon DynamoDB
Update an item only when a prior read confirms it exists.
- Read the target item by its primary key to confirm it exists.
- Apply the update expression to the item that the prior read confirmed exists, returning the new attribute values.
What you'll need to have ready
- tableName: The name of the table containing the item.
- key: The primary key of the item, as a map of attribute name to AttributeValue.
- updateExpression: The update expression to apply (e.g. "SET
- expressionAttributeNames: Optional substitution tokens for attribute names.
- expressionAttributeValues: Values substituted into the update expression.
For your developer
Arazzo workflow amazon-dynamodb:conditional-update-item, 2 operations: GetItem → UpdateItem. Specs on APIs.io.