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Date and Time Date and Time Email Send Email using Flask-Mail Send Email using SendGrid Files Read a file in Python Flask Flash Getting Started with Flash Messages Flask Login Getting Started with Flask Login Functions Use Python function in Jinja Template GET POST requests Get keys and values from URL Submitting a GET request to an API Submitting a POST request to an API Getting Started Getting Started with Flask on Linux Getting Started with Flask using VSCode on Windows HTML Include HTML Render HTML using the safe filter HTTP Headers GET HTTP Headers using the request module Install Install meinheld gunicorn Flask on Docker Install uWSGI Nginx Flask on Docker JSON Getting Started with JSON and dictionary Logging Customizing Docker Logs dictConfig logger Mobile Determine if Mobile Device using Flask-Mobility Modules Importing your own modules mySQL / MariaDB Select from mySQL or MariaDB using Flask-SQLAlchemy Port Run Flask on a specific port Python virtual environment Running Flask app in Python virtual environment Redis Cache Getting Started with Redis Cache Routes / Blueprints Catch All Route Creating endpoints using Routes Passing values into a route Resolve 308 Redirect Sessions Getting Started with Sessions Session Duration SQLAlchemy Append records to table using SQLAlchemy Connect to MariaDB using Flask-SQLAlchemy create_all Connect to MariaDB using SQLAlchemy create_engine Connect to mySQL using SQLAlchemy create_engine Connect to Postgres using SQLAlchemy create_all Connect to Postgres using SQLAlchemy create_engine Connect to SQLite using SQLAlchemy Count records in a table using SQLAlchemy Create database using SQLAlchemy Create table using SQLAlchemy Determine if a database exists using SQLAlchemy Determine if a table exists using SQLAlchemy Getting Started with SQLAlchemy Loop through SQLAlchemy results Query records in a table using SQLAlchemy Return SQLAlchemy results ascending, descending or shuffled Update records in a table using SQLAlchemy SSL Force HTTP to redirect to HTTPS Static Static Files Templates Redirect a user to an HTML page using redirect and url_for Redirect a user to an HTML page using render_template Troubleshooting Resolve "400 Bad Request: The browser (or proxy) sent a request that this server could not understand" Resolve "AttributeError: 'function' object has no attribute 'query'" Resolve "AttributeError: object has no attribute 'is_active'" Resolve "Blueprint object has no attribute query" Resolve "The 'sha256' password method is deprecated and will be removed in Werkzeug 3.0. Migrate to the 'scrypt' method." Resolve "The current Flask app is not registered with this 'SQLAlchemy' instance" Resolve SQLAlchemy "instance is not bound to a session" Resolve SQLAlchemy "Lost connection to server during query" Uploading Files Uploading files Username Password Create secure password using generate_password_hash Verify password using check_password_hash