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docs/03-views.md

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# 03. Views
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## Views
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뷰는 Django 어플리케이션이 특정 기능과 템플릿을 제공하는 웹페이지의 종류
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### `polls/views.py`
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```python
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from django.shortcuts import render, get_object_or_404
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from django.http import HttpResponse, Http404
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from django.template import loader
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from .models import Question
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def index(request):
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latest_question_list = Question.objects.order_by('-pub_date')[:5]
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context = {'latest_question_list': latest_question_list}
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return render(request, 'polls/index.html', context)
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def detail(request, question_id):
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# 객체가 존재하지 않으면 Http404 에러 발생하는 메서드
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question = get_object_or_404(Question, pk=question_id)
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return render(request, 'polls/detail.html', {'question': question})
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def results(request, question_id):
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response = f"You're looking at the results of question {question_id}"
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return HttpResponse(response)
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def vote(request, question_id):
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return HttpResponse(f"You're voting on question {question_id}")
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```
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### `polls/urls.py`
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```python
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from django.urls import path
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from . import views
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app_name = 'polls' # URL의 이름공간
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urlpatterns = [
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# ex: /polls/
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path('', views.index, name='index'),
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# ex: /polls/5/
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path('<int:question_id>/', views.detail, name='detail'),
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# ex: /polls/5/results/
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path('<int:question_id>/results/', views.results, name='results'),
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# ex: /polls/5/vote/
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path('<int:question_id>/vote/', views.vote, name='vote'),
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]
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```
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### `polls/templates/polls/index.html`
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```html
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{% if latest_question_list %}
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<ul>
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{% for question in latest_question_list %}
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<li><a href="{% url 'polls:detail' question.id %}">{{ question.question_text }}</a></li>
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{% endfor %}
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</ul>
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{% else %}
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<p>No polls are available.</p>
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{% endif %}
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```
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### `polls/templates/polls/detail.html`
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```html
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<h1>{{ question.question_text }}</h1>
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<ul>
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{% for choice in question.choice_set.all %}
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<li>{{ choice.choice_text }}</li>
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{% endfor %}
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</ul>
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```

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