A database cursor executes SQL statements and reads their results through an established database connection. Keeping connection setup separate lets the cursor focus on database actions. section 5.3.3
In a Flask route, a connection can provide the cursor inside a context manager. A model receives that cursor, fetches rows, and passes the resulting data to the template before the connection closes. section 5.3.5
A practical cursor workflow is:
- Create or receive a cursor from the database connection. section 5.3.5
- Execute a query, such as selecting users or questions. section 5.3.3
- Fetch rows and return or render the resulting data. section 5.3.3 section 5.3.5
- Reuse the injected cursor across model methods instead of opening unrelated connections. section 5.3.9
- Close the connection after database work completes, preferably through the surrounding context manager. section 5.3.5
Passing a cursor through a Flask route
with DatabaseConnection(db_path) as cursor: questions = Questions(cursor) data = questions.fetch_data() return render_template('index.html', data=data) The cursor is created with the connection, passed into Questions, used to fetch records, and invalidated when the connection closes. When generated code omits required imports or constructor arguments, inspect the traceback and correct the dependency explicitly. section 5.3.5 section 5.3.9
