Flask Tutorial Part 4: Working with Forms

Flask Tutorial Part 4: Routing and URL Building

🚦 What is Routing in Flask?

Routing in Flask means mapping a URL to a function. Flask uses a Python decorator @app.route() to define URL routes. Each route is associated with a view function, which is executed when the specified URL is requested. This makes it possible for Flask to handle different requests and return the appropriate response for each one.

🧪 Basic Routing Example

from flask import Flask

app = Flask(__name__)

@app.route("/")
def home():
    return "Welcome to DarchumsTech!"

🔀 Dynamic Routing

You can capture parts of the URL and pass them as arguments to your view function:

@app.route("/user/<username>")
def show_user(username):
    return f"Hello, {username}!"

🔗 URL Building with url_for()

Flask provides a url_for() function to generate URLs using function names rather than hardcoding them:

from flask import url_for

@app.route("/dashboard")
def dashboard():
    return "Dashboard Page"

@app.route("/go_to_dashboard")
def go_to_dashboard():
    return redirect(url_for('dashboard'))

📌 Summary

• Use @app.route() to map URLs to Python functions.
• Use angle brackets <> to capture dynamic values in routes.
• url_for() helps you generate URLs programmatically.