Discover how to add effective transaction management in Xano. Follow these detailed steps to maintain data integrity and achieve consistency within your Xano apps.
Managing transactions in Xano is vital to keep your data consistent and dependable within your backend systems. Transactions let you group multiple database operations into one block. So, they either all succeed or none do, preventing incomplete updates and maintaining data accuracy. This guide lays out the steps necessary to set up and handle transactions in Xano. It covers essential ideas, how to start and control transactions, and the best ways to manage errors and rollbacks effectively.
Head over to the Xano dashboard and whip up a new API collection. This is where all the transaction magic will happen.
Set up the database tables you'll need to handle transactions. Think Users, Accounts, and Transactions. Make sure those foreign keys are spot on to keep everything linked up nicely.
In your API endpoint, lay out the input parameters needed for a transaction. Usually, you'll need the sender’s account ID, receiver’s account ID, and the amount to be transferred.
Grab the account details for both the sender and receiver using their account IDs. This step makes sure both accounts are legit and active.
SELECT * FROM Accounts WHERE id = {{ sender_account_id }};
SELECT * FROM Accounts WHERE id = {{ receiver_account_id }};
Check if the sender's account has enough balance for the transaction. If not, throw an error and stop the transaction right there.
if(sender_account.balance < {{ amount }}) {
throw new Error("Insufficient balance");
}
Kick off a database transaction to make sure all the following steps happen together or not at all.
BEGIN TRANSACTION;
Take the specified amount out of the sender’s account.
UPDATE Accounts SET balance = balance - {{ amount }} WHERE id = {{ sender_account_id }};
Add the specified amount to the receiver’s account.
UPDATE Accounts SET balance = balance + {{ amount }} WHERE id = {{ receiver_account_id }};
Pop a record into the Transactions table to log the transaction.
INSERT INTO Transactions (sender_id, receiver_id, amount) VALUES ({{ sender_account_id }}, {{ receiver_account_id }}, {{ amount }});
Commit the database transaction to lock in the changes.
COMMIT;
If anything goes wrong during the transaction steps, make sure to rollback the database transaction to keep everything clean.
ROLLBACK;
return new Error("Transaction Failed");
Test the transactional API endpoint thoroughly with different scenarios, like successful transactions, insufficient funds, and database errors, to make sure it works as expected.
Keep tweaking your transaction management logic to handle all sorts of edge cases and ensure solid error handling.
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