10. Interim Conclusion

Examples 01 through 28 have presented, one by one, all the concepts required by the case study:

Concept	Examples	In the case study
views, routing, responses, redirects	01 through 05	[config/urls.py], [web/urls.py], folder [web/views]
shared services	06	[business/provider.py], [web/application.py]
view model, validation forms, decorators	07 through 12	[web/utils.py] (raw parameter values), [business/person_data.py]
templates, parent template, fragments, tags, and filters	13 to 16	folder [templates], [web/templatetags/rdv.py], [web/contexts.py]
forms, validation, re-display, Bootstrap rendering	17 to 19	[web/forms.py], [web/rendering.py], [templates/forms/field.html]
POST / Redirect / GET, flash messages	20	Views, [templates/fragments/success.html]
links and buttons, anti-CSRF protection, confirmation window	21	[fragments/confirmation.html], [static/js/app.js], [web/views/persons.py]
internationalization	22	folder [locale], [web/middleware.py], [web/views/language.py]
data scope, cache, signed cookies	23	[web/application.py] (cache), folder [security] (cache, cookies)
middleware, signals, error pages	24	[web/middleware.py], [security/middleware.py], [web/views/errors.py]
authentication JWT, roles, access control, CAPTCHA, rate limiting	25–27	folder [security], [web/views/auth.py]
Web / Business / DAO, ORM, Transactions	28	files [models], [dao], [business]

The case study brings them together into a complete, realistic-sized application (nearly 90 files, approximately 5,500 lines, including comments). It was written with the same care as the examples: each file begins with a comment explaining its role, and tricky sections are annotated in the code. Each main folder also contains a file named [README.md] that lists its files. The document’s comments highlight what the examples did not show and refer to them for the rest.