How do I do database transactions with psycopg2/python db api?

Use db.set_isolation_level(n), assuming db is your connection object. As Federico wrote here, the meaning of n is: 0 -> autocommit 1 -> read committed 2 -> serialized (but not officially supported by pg) 3 -> serialized As documented here, psycopg2.extensions gives you symbolic constants for the purpose: Setting transaction isolation levels ==================================== psycopg2 connection objects … Read more

How to handle authentication/authorization with users in a database?

There are several options. Which to choose is fully up to you. Just objectively weigh the concrete advantages and disadvantages conform your own situation. 1. Use Java EE provided container managed authentication Just declare a <security-constraint> in web.xml which refers a security realm which is configured in servletcontainer. You can for your webapp specify URL … Read more

Restricting MySQL connections from localhost to improve security

If you restrict access from remote hosts to your usernames and passwords then someone won’t be able to access the database externally. You could also configure your firewall to only allow traffic to 3306 (MySQL Default Port) from the localhost machine. Update To setup your user so they can only access through LOCALHOST use: GRANT … Read more

How to sort using Realm?

You can add an ascending parameter to the sorted method: data = data!.sorted(“date”, ascending: false) This sorts your WorkoutSet using the date field in descending order. Update With Swift 3 and the latest RealmSwift version this has now changed to: data = data!.sorted(byKeyPath: “date”, ascending: false) If you want to evaluate the sort criteria yourself … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)