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To run your web application, you’ll first tell Flask where to find the application (the hello.py file in your case) with the FLASK_APP environment variable: flask_app/app.py # ... @app .route ( '/capitalize//' ) def capitalize (word ) : return '

{}

' . format (escape (word .capitalize ( ) ) ) You can now interact with the new questions model in your questions blueprint. To do so, open the questions blueprint’s routes.py file for a modification to query and display the questions you have in your questions table:

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Finally, adjust the firewall again. You no longer need access through port 5000, so you can remove that rule. You can then allow full access to the Nginx server: flask_blog/templates/index.html

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Then set the FLASK_ENV environment variable to development to run the application in development mode and get access to the debugger. For more information about the Flask debugger, see How To Handle Errors in a Flask Application. Use the following commands to do this (on Windows, use set instead of export): Capacity: Bigger capacity means more contents to enjoy. It also means more weight to carry, but only if you fill it to the brim. For best insulation, buy a flask that’s slightly bigger (but not heavier) than you need, and leave a couple of centimetres of air at the top. We’ve included capacity and weight info for all our flasks below. You import the bp blueprint object from the main blueprint and rename it to main_bp for readability. Then you use the app.register_blueprint() method to register this main blueprint for Flask to treat as part of the application. In the categories route, you render a categories.html template, which will also be inside a posts directory inside the templates folder. Now that you’ve created a User model, you can move on to configuring your database. Step 6 — Configuring the Database

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With this, the users of your application can now write new blog posts and add them to the database, edit, and delete existing posts. Conclusion In this new version of the index() function, you first open a database connection using the get_db_connection() function you defined earlier. Then you execute an SQL query to select all entries from the posts table. You implement the fetchall() method to fetch all the rows of the query result, this will return a list of the posts you inserted into the database in the previous step. a > {% if current_user.is_authenticated %} The global request object to access incoming request data that will be submitted via the HTML form you built in the last step.Here, the syntax {% for post in posts %} is a Jinja for loop, which is similar to a Python for loop except that it has to be later closed with the {% endfor %} syntax. You use this syntax to loop over each item in the posts list that was passed by the index() function in the line return render_template('index.html', posts=posts). Inside this for loop, you display the post title in an

heading inside an tag (you’ll later use this tag to link to each post individually). You use a class called Config and set configuration values using class variables. Here, you set three configurations:

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The function you’ll use to retrieve a post will respond with a 404 Not Found error if the ID of the requested post does not correspond with any of the existing posts. To do this, you’ll use the abort() function, which aborts a request and responds with an error message. For more, see How To Handle Errors in a Flask Application. You use a Jinja for loop in the line {% for message in messages %} to go through each message in the messages list. You use a

tag to contain the message’s title and content. You display the title in an

heading and the content in a

tag. This output means that the db object was properly registered. If you get an error running the code in the Flask shell, ensure you’ve correctly registered the db object in your factory function before moving to the next section. You can exit the Flask shell by typing exit(). Creating and Interacting with the Post ModelYou will use the sqlite3 module to interact with the database, which is readily available in the standard Python library.

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To verify the configuration, navigate once again to your domain, using https://: https:// your_domainflask_app/app/templates/base.html

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