#19889: Tutorial03 makes you refactor code that you cannot run
-------------------------------+--------------------
     Reporter:  jpic           |      Owner:  nobody
         Type:  Uncategorized  |     Status:  new
    Component:  Documentation  |    Version:  master
     Severity:  Normal         |   Keywords:
 Triage Stage:  Unreviewed     |  Has patch:  0
Easy pickings:  0              |      UI/UX:  0
-------------------------------+--------------------
 1. [https://docs.djangoproject.com/en/dev/intro/tutorial03/#writing-more-
 views Writing more views] introduces `polls.views.detail` code that is
 testable with `runserver`:

 {{{
     def detail(request, poll_id):
         return HttpResponse("You're looking at poll %s." % poll_id)
 }}}

 2. Then,
 [https://docs.djangoproject.com/en/dev/intro/tutorial03/#raising-a-404-error
 Raising 404 error] introduces a new version of this view:

 {{{
 def detail(request, poll_id):
     try:
         poll = Poll.objects.get(pk=poll_id)
     except Poll.DoesNotExist:
         raise Http404
     return render(request, 'polls/detail.html', {'poll': poll})
 }}}

 (Which you cannot test yet because you don't have `polls/detail.html`)

 3. Then, this view code changes in
 [https://docs.djangoproject.com/en/dev/intro/tutorial03/#a-shortcut-get-
 object-or-404 A shortcut: get_object_or_404].

 4. Then, and only then, the tutorial makes you create `polls/details.html`
 in [https://docs.djangoproject.com/en/dev/intro/tutorial03/#use-the-
 template-system Use the template system].

 I think it's a problem that you code something in step 2., change it in
 step 3., but are able to test it only after step 4. Shouldn't the app be
 run-able at every step ?

-- 
Ticket URL: <https://code.djangoproject.com/ticket/19889>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.

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