python - how to manage lock-write mechanism in django -

I'm looking for some time to handle the lock-write system (when the user is updating the record Should be closed for others). And I have been told that the web-frame work is responsible for this.
Consider this:

My question is: How do I do this in other words with the Denggo? Which Title Should I Find? This is an evolving task, thanks / thanks in advance

Locks on the database provided by your DBMS such as MySQL or MSSQL Are done server Not your framework or webserver