diff options
Diffstat (limited to 'docs/intro/tutorial03.txt')
| -rw-r--r-- | docs/intro/tutorial03.txt | 49 |
1 files changed, 28 insertions, 21 deletions
diff --git a/docs/intro/tutorial03.txt b/docs/intro/tutorial03.txt index c0b3b00a51..04bd83ae52 100644 --- a/docs/intro/tutorial03.txt +++ b/docs/intro/tutorial03.txt @@ -75,10 +75,12 @@ slightly different, because they take an argument: def detail(request, question_id): return HttpResponse("You're looking at question %s." % question_id) + def results(request, question_id): response = "You're looking at the results of question %s." return HttpResponse(response % question_id) + def vote(request, question_id): return HttpResponse("You're voting on question %s." % question_id) @@ -94,13 +96,13 @@ Wire these new views into the ``polls.urls`` module by adding the following urlpatterns = [ # ex: /polls/ - path('', views.index, name='index'), + path("", views.index, name="index"), # ex: /polls/5/ - path('<int:question_id>/', views.detail, name='detail'), + path("<int:question_id>/", views.detail, name="detail"), # ex: /polls/5/results/ - path('<int:question_id>/results/', views.results, name='results'), + path("<int:question_id>/results/", views.results, name="results"), # ex: /polls/5/vote/ - path('<int:question_id>/vote/', views.vote, name='vote'), + path("<int:question_id>/vote/", views.vote, name="vote"), ] Take a look in your browser, at "/polls/34/". It'll run the ``detail()`` @@ -157,10 +159,11 @@ commas, according to publication date: def index(request): - latest_question_list = Question.objects.order_by('-pub_date')[:5] - output = ', '.join([q.question_text for q in latest_question_list]) + latest_question_list = Question.objects.order_by("-pub_date")[:5] + output = ", ".join([q.question_text for q in latest_question_list]) return HttpResponse(output) + # Leave the rest of the views (detail, results, vote) unchanged There's a problem here, though: the page's design is hard-coded in the view. If @@ -229,10 +232,10 @@ Now let's update our ``index`` view in ``polls/views.py`` to use the template: def index(request): - latest_question_list = Question.objects.order_by('-pub_date')[:5] - template = loader.get_template('polls/index.html') + latest_question_list = Question.objects.order_by("-pub_date")[:5] + template = loader.get_template("polls/index.html") context = { - 'latest_question_list': latest_question_list, + "latest_question_list": latest_question_list, } return HttpResponse(template.render(context, request)) @@ -261,9 +264,9 @@ rewritten: def index(request): - latest_question_list = Question.objects.order_by('-pub_date')[:5] - context = {'latest_question_list': latest_question_list} - return render(request, 'polls/index.html', context) + latest_question_list = Question.objects.order_by("-pub_date")[:5] + context = {"latest_question_list": latest_question_list} + return render(request, "polls/index.html", context) Note that once we've done this in all these views, we no longer need to import :mod:`~django.template.loader` and :class:`~django.http.HttpResponse` (you'll @@ -288,13 +291,15 @@ for a given poll. Here's the view: from django.shortcuts import render from .models import Question + + # ... def detail(request, question_id): try: question = Question.objects.get(pk=question_id) except Question.DoesNotExist: raise Http404("Question does not exist") - return render(request, 'polls/detail.html', {'question': question}) + return render(request, "polls/detail.html", {"question": question}) The new concept here: The view raises the :exc:`~django.http.Http404` exception if a question with the requested ID doesn't exist. @@ -323,10 +328,12 @@ provides a shortcut. Here's the ``detail()`` view, rewritten: from django.shortcuts import get_object_or_404, render from .models import Question + + # ... def detail(request, question_id): question = get_object_or_404(Question, pk=question_id) - return render(request, 'polls/detail.html', {'question': question}) + return render(request, "polls/detail.html", {"question": question}) The :func:`~django.shortcuts.get_object_or_404` function takes a Django model as its first argument and an arbitrary number of keyword arguments, which it @@ -408,7 +415,7 @@ defined below:: ... # the 'name' value as called by the {% url %} template tag - path('<int:question_id>/', views.detail, name='detail'), + path("<int:question_id>/", views.detail, name="detail"), ... If you want to change the URL of the polls detail view to something else, @@ -417,7 +424,7 @@ template (or templates) you would change it in ``polls/urls.py``:: ... # added the word 'specifics' - path('specifics/<int:question_id>/', views.detail, name='detail'), + path("specifics/<int:question_id>/", views.detail, name="detail"), ... Namespacing URL names @@ -440,12 +447,12 @@ file, go ahead and add an ``app_name`` to set the application namespace: from . import views - app_name = 'polls' + app_name = "polls" urlpatterns = [ - path('', views.index, name='index'), - path('<int:question_id>/', views.detail, name='detail'), - path('<int:question_id>/results/', views.results, name='results'), - path('<int:question_id>/vote/', views.vote, name='vote'), + path("", views.index, name="index"), + path("<int:question_id>/", views.detail, name="detail"), + path("<int:question_id>/results/", views.results, name="results"), + path("<int:question_id>/vote/", views.vote, name="vote"), ] Now change your ``polls/index.html`` template from: |