if request.method == "POST": 指针没有出现在 if 语句中，有人能看出来吗？

如何解决if request.method == "POST": 指针没有出现在 if 语句中，有人能看出来吗？

此代码不适用于视图文件中的 post 请求，因此请任何人尝试告诉我为什么光标没有进入“POST”，请找出问题所在。

views.py

@login_required()
def candidate_view(request):
    if request.method == "POST":
        can = candidate.objects.filter(position = 'President')
        return render(request,'poll/candidate.html',{'can':can})
    else:
        return render(request,'poll/candidate.html')

候选人.html

{% extends 'base.html' %}
{% block title %}Candidates{% endblock %}
{%block body%}

  <h2>Available Candidates of {{ obj.title }}</h2>
  <form action="" method="POST">
    {% csrf_token %}
    {% for c in can.candidate_set.all %}
      <!-- <input type="radio" name="{{ c.position}}" value="{{c.id}}" required> <strong>{{c.name}} <a href="{% url 'detail' c.id %}">Detail</a></strong>
     <br> -->
     <div class="custom-control custom-radio">
      <input type="radio" id="id_{{c.id}}" name="{{ c.full_name}}" value="{{c.id}}" class="custom-control-input" required>
      <label class="custom-control-label" for="id_{{c.id}}">{{c.full_name}}</label>
    </div>
    {% empty %}
      <p>No Candidates Available</p>
    {% endfor %}
    <br><input type="submit" class="btn btn-outline-success btn-sm" value="Vote">
  </form>
  <br><p><a href="{% url 'Vote' %}">Back to Poll</a></p>
{% endblock %}

投票.html

{% extends 'base.html' %}
{% block title %}Positions{% endblock %}
{%block body%}
<form action="" method="POST">
  {%csrf_token%}
  <ul>
    <li><h2><a href="{% url 'candidate_view' %}"> President</a></h2></li>
    <li><h2><a href="#"> Vice President </a></h2></li>
    <li><h2><a href="#"> Secratary </a></h2></li>
    <li><h2><a href="#"> Vice Secratary </a></h2></li>
  </ul>
</form>
{% endblock %}

urls.py

from django.contrib import admin
from django.urls import path,include
from . import views
urlpatterns = [
    path('',views.home,name="home"),path('register',views.register,name="register"),path('login',views.view_login,name="view_login"),path('logout',views.view_logout,name="view_logout"),path('candidate_view',views.candidate_view,name="candidate_view"),path('Vote',views.Vote,name="Vote"),path('result',views.result,name="result"),]

解决方法

替换

<form action="" method="POST">
  {%csrf_token%}
  <ul>
    <li><h2><a href="{% url 'candidate_view' %}"> President</a></h2></li>
    <li><h2><a href="#"> Vice President </a></h2></li>
    <li><h2><a href="#"> Secratary </a></h2></li>
    <li><h2><a href="#"> Vice Secratary </a></h2></li>
  </ul>
</form>

与

<form action="{% url 'candidate_view' %}" method="POST">
  {%csrf_token%}
  <label for="President">President</label>
  <input type="radio" id="President" name="position" value="President" />
  <label for="Vice-President">Vice President</label>
  <input type="radio" id="Vice-President" name="position" value="Vice President" />
  ( similarly for secretary and vice secretary )
  <button>Submit</button>
</form>

同时用

更新view.py

def candidate_view(request):
    if request.method == "POST":
        can = candidate.objects.filter(position = request.POST.get("position"))
        return render(request,'poll/candidate.html',{'can':can})
    else:
        return render(request,'poll/vote.html')