其他分享
首页 > 其他分享> > Django part4

Django part4

作者:互联网

Django part4

polls part4

polls/detail.html

进一步完善detail

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>polls 详情页</title>
</head>
<body>
<h1>{{ question.question_text }}</h1>

{% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}
<!--vote()返回异常信息 -->
<form action="{% url 'polls:vote' question.id %}" method="post">
{% csrf_token %}
<!--表单处理 -->
<!--post方法需要导入的template tag -->
{% for choice in question.choice_set.all %}
    <input type="radio" name="choice" id="choice{{ forloop.counter }}" value="{{ choice.id }}">
    <label for="choice{{ forloop.counter }}">{{ choice.choice_text }}</label><br>
    <!--forloop.counter 计数器 -->
{% endfor %}
<input type="submit" value="Vote">
</form>
</body>
</html>

polls/views.py

进一步完善views.py

from django.shortcuts import render
from django.http import HttpResponse, HttpResponseRedirect
from django.http import Http404
from .models import Question
from django.template import loader
from django.shortcuts import get_object_or_404
from .models import Choice
from django.urls import reverse
# Create your views here.
# Django模板使用  https://docs.djangoproject.com/en/2.2/topics/templates/


def index(request):
    latest_question_list = Question.objects.order_by('-pub_date')[:5]
    template = loader.get_template('polls/index.html')
    context = {
        'latest_question_list': latest_question_list,
    }
    return HttpResponse(template.render(context, request))


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})


def results(request, question_id):
    question = get_object_or_404(Question, pk=question_id)
    return render(request, 'polls/results.html', {'question': question})


def vote(request, question_id):
    question = get_object_or_404(Question, pk=question_id)
    # get_object_or_404 是Django 一种简单的写法,没找到指定资源,会抛出404异常
    try:
        selected_choice = question.choice_set.get(pk=request.POST['choice'])
          # request.POST['choice'] 类似字典获取from表单post 传递数据,返回值会string类型
    except (KeyError, Choice.DoesNotExist):
        # Redisplay the question voting form.
        return render(request, 'polls/detail.html', {
            'question': question,
            'error_message': "You didn't select a choice.",
        })
    else:
        selected_choice.votes += 1
        selected_choice.save()
        # Always return an HttpResponseRedirect after successfully dealing
        # with POST data. This prevents data from being posted twice if a
        # user hits the Back button.
        return HttpResponseRedirect(reverse('polls:results', args=(question.id,)))

polls/results.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>polls 结果</title>
</head>
<body>
<h1>{{ question.question_text }}</h1>

<ul>
{% for choice in question.choice_set.all %}
    <li>{{ choice.choice_text }} -- {{ choice.votes }} vote{{ choice.votes|pluralize }}</li>
{% endfor %}
</ul>

<a href="{% url 'polls:detail' question.id %}">Vote again?</a>
</body>
</html>

参考博客

Django表单
Django传值
用python专业版创建Django项目
Django创建一个应用项目
Django app2
Django part3

标签:request,polls,question,choice,part4,import,Django
来源: https://blog.csdn.net/qq_41146650/article/details/99326412