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In this route, you use a special converter int with the URL variable ( /add/< int:n1>/< int:n2>/) which only accepts positive integers. By default, URL variables are assumed to be strings and are treated as such. Before the user logs in, they will have the option to log in or sign-up. After they have logged in, they can go to their profile or log out. 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: Now that you have a SQL schema in the schema.sql file, you’ll use it to create the database using a Python file that will generate an SQLite .db database file. Open a file named init_db.py inside the flask_blog directory using your preferred editor: Note: This tutorial is limited in scope and does not cover advanced persisting of sessions. Furthermore, modifying the data type for the primary key or considerations for migrating to different database systems are also outside of the scope of this introductory tutorial.

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If you stop your app and open up a Python REPL, you can create the database using the create_all method on the db object:

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You have now set up a configuration file for your application. Next, you’ll set up a Flask application instance and create a few blueprints that represent different components of your Flask application. Step 3 — Creating a Flask Application Factory

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a href = "{{ url_for('post', post_id=post['id']) }} " >

{{ post['title'] }}

{{ post['created'] }} Edit

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You now have a blueprint with a route in your application. Next, you will edit the main route in the main blueprint to render an HTML template, which will demonstrate how to render templates when working with Flask blueprints. Systemd requires that you give the full path to the Gunicorn executable, which is installed within your virtual environment. You have now created a Flask application factory function. Next, you’ll create Flask blueprints and register them in this factory function. Step 4 — Creating Flask Blueprints

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project/auth.py from flask import Blueprint , render_template . . . @auth .route ( '/login' ) def login ( ) : return render_template ( 'login.html' ) @auth .route ( '/signup' ) def signup ( ) : return render_template ( 'signup.html' ) First, you’ll add a new route to the app.py file. Its view function will receive the ID of the post that needs to be edited, the URL will be in the format / post_id/edit with the post_id variable being the ID of the post. Open the app.py file for editing: Here, you pass 'post' to the url_for() function as a first argument. This is the name of the post() view function and since it accepts a post_id argument, you give it the value post['id']. The url_for() function will return the proper URL for each post based on its ID. You can further develop this application by adding user authentication so that only registered users can create and modify blog posts, you may also add comments and tags for each blog post, and add file uploads to give users the ability to include images in the post. See the Flask documentation for more information.Now that you’ve created a User model, you can move on to configuring your database. Step 6 — Configuring the Database Note: You will not set a secret key in this tutorial because you will not use functionality that needs a secret key. However, if you need to set a secret key, you can set it as follows (for Windows, use set instead of export): 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

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A Thermos King will last years but it’s not officially dishwasher-safe, and you’re not even meant to submerge it in water (if you do, you kill the manufacturer’s 50-year guarantee). Inquisitive users report that it does survive the dishwasher intact, albeit with peeling colour. To create a questions database model, open a new file called question.py inside your models directory:At this point in the tutorial, your flask_app directory structure is as follows (excluding the virtual environment’s directory): . To verify the configuration, navigate once again to your domain, using https://: https:// your_domain created: The time the blog post was created. NOT NULL signifies that this column should not be empty, and the DEFAULT value is the CURRENT_TIMESTAMP value, which is the time at which the post was added to the database. Just like id, you don’t need to specify a value for this column, as it will be automatically filled in. This new function has a post_id argument that determines what post to retrieve and return. You open a database connection with get_db_connection() and execute an SQL query to get the post associated with the given post_id value. You get the post with the fetchone() method, store it in the post variable, and close the connection.