TransactWrite

Performs multiple write operations atomically across up to 100 items. All succeed or all fail. Supports Put, Update, Delete, and ConditionCheck.

Syntax

dynamodb

await docClient.send(new TransactWriteCommand({ TransactItems: [...] }))

Example

dynamodb

await docClient.send(new TransactWriteCommand({
  TransactItems: [
    {
      Update: {
        TableName: 'MyApp',
        Key: { PK: 'PRODUCT#1', SK: 'META' },
        UpdateExpression: 'SET stock = stock - :n',
        ConditionExpression: 'stock >= :n',
        ExpressionAttributeValues: { ':n': 1 },
      },
    },
    { Put: { TableName: 'MyApp', Item: { PK: 'ORDER#1', SK: 'ITEM#1' } } },
  ],
}));