fix: Add error handling for database connection #34
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Summary
Adds error handling for database connections in the
DBclass inexamples/visualizer/main.py.Validates the presence of the
CHAI_DATABASE_URLenvironment variable before attempting a connection.Wraps the
psycopg2.connectcall in atry-exceptblock to provide meaningful error messages when a connection fails.Why This Change is Necessary
Prevents unexpected crashes when the database connection fails or
CHAI_DATABASE_URLis not set.Provides clear, actionable feedback to the user.
Changes
Added a validation step for
CHAI_DATABASE_URL.Added error handling for
psycopg2.OperationalErrorduring database connection.