Discussion
You have reached the end of the course. The next step is to build something small with the concepts you have seen, because framework knowledge becomes useful only when it is applied.
Questions to review
- Can you trace a URL from the browser to a controller, model, and view?
- Where would you put a query that is used by three different pages?
- Which pages are safe to cache, and which must always be generated per user?
- How does your application prove that a signed-in user owns the record they are editing?
- What happens when a form is submitted twice or a database transaction fails halfway?
Practice project ideas
- A small catalog with categories, search, pagination, and image uploads.
- A ticket tracker with authentication, filters, validation, and flash messages.
- A public tutorial site with a reader layout, sitemap, and caching.
- An admin dashboard that profiles its own slowest query.
Common pitfalls
- Putting queries in views or HTML in models.
- Forgetting to escape output.
- Trusting a hidden form field for permissions.
- Caching personalised pages.
- Leaving development error pages enabled in production.
Keep the discussion going
Share what you build, ask specific questions with the relevant code and version, and answer others when you can. A clear problem statement with a small reproduction is the fastest way to get useful help in any community forum.
Good applications are built iteratively. Start with a working slice, measure it, secure it, and improve it.