Batch Write Transactions

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Cross-Collection Operations

The legacy query API methods support atomic operations across collections. For more information, see ditto.store.write in your language’s API reference.

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Implementing Global Async Transactions

For example, in Swift, use DispatchQueue.global, as follows:

DispatchQueue.global(qos: .default).async {

    ditto.store.write { transaction in

        let scope = transaction.scoped(toCollectionNamed: "passengers-\(thisFlight)")

       // Loop inside the transaction to avoid writing to database too frequently
        self.passengers.forEach {
            scope.upsert($0.dict)
        }
    }
}

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Log Message: Transaction Remains Blocked

If you see this message in your Ditto logs, read the Troubleshooting guide for more information about how to debug blocked database transactions.