Webwithpy's persistence manager

Example: Page Viewed Counter

This example demonstrates how to implement a simple counter that increments each time a user visits the homepage.

from webwithpy import PersistenceManager
from webwithpy.routing import GET
from webwithpy import run_server


@GET("/")
def page_viewed_counter():
    if isinstance(PersistenceManager.get_item("counter"), bool):
        PersistenceManager.set_item("counter", 1)
    else:
        PersistenceManager.set_item(
            "counter", PersistenceManager.get_item("counter") + 1
        )

    return f'counter: {PersistenceManager.get_item("counter")}'


if __name__ == "__main__":
    run_server()

Best Practices

• Use descriptive keys: When using set_item and get_item, choose keys that clearly describe the data being stored. This makes your code more readable and maintainable.
• Handle exceptions: Consider handling potential exceptions that might occur during data retrieval or storage. This can help in debugging and ensuring a more robust application.
• Consider data types: Be mindful of the data types you're storing. The Persistence Manager stores data as strings, so you may need to convert between strings and other types when retrieving data.

Conclusion

The webwithpy Persistence Manager simplifies the process of storing and retrieving user-specific data. By following this guide, you can easily integrate persistence into your web applications, enhancing user experience and data retention.