Reviewing the architecture that brings together Cappuccino, Django, and AJAX - let's make it perfect!

Trying to navigate the world of Cappuccino here. Looking for feedback from colleagues at StackOverview on the structure outlined below - the goal being to leverage the unique advantages of Django and Cappuccino without duplicating efforts...

When a 'friendly' URL is requested by the web browser (e.g., /, /articles, etc):

  • Catching this request, DJango's urls.py identifies a view.
  • Rather than following DJango's usual process of populating a template with the locals dict,
    the view returns the concise HTML snippet used in a Cappuccino app directly.
  • The client fetches the Cappuccino HTML.
  • Subsequently, the client seeks out the Objective J JS URLs referenced in the HTML snippet.
  • The end-user app materializes and gets displayed on the browser.

A functioning app is now available in the browser. When the user initiates an action that requires server interaction:

  • The browser dispatches an XMLHTTPRequest to a specific URL.
  • DJango's URLs.py directs this request to a corresponding view.
  • The view carries out its tasks, potentially engaging with the DB model. However, instead of serving a template, Django replies with JSON data.
  • The client receives the JSON content and performs necessary actions accordingly.

Does this approach seem logical? We maintain the advantage of user-friendly URLs and benefit from the database setup done automatically for our coding needs. Rather than relying on templates, we offer Cappuccino stub pages and JSON responses to deliver a more app-like experience to users rather than an HTML templating system.

Is there a better alternative method? What are the preferences of other Python programmers? Appreciate any insights you can provide. Thank you!

Answer №1

If you're running a small website with minimal traffic, using Django's routing layer should suffice. However, if you anticipate a significant increase in traffic, it may be beneficial to have your proxying webserver handle the stubs.

In terms of functionality, TurboGears has been successfully implementing this strategy for years (I personally prefer using TG as I was a committer). The architecture of returning a dictionary to a template simplifies the process, especially when 'json' is set as the template engine.

Implementing a similar approach in Django is also quite straightforward. Utilize the serialization tools to directly write the result to the response instead of relying on templating calls.

It's important to note that consolidating all application logic in one place makes management much more efficient. Splitting app logic between Django and the browser can lead to confusion and complexity. Viewing the server as a basic persistence layer, excluding validation/authentication/authorization tasks, can simplify operations.

On another note, if you're considering heavier non-progressive enhancement frameworks, Sproutcore tends to be more user-friendly compared to Cappuccino.

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