在上下文中傳遞用戶的組名並在模板中訪問django

Question

我在我的django應用程序中使用了mixins和基於類的視圖。我還創建了一個名爲Instructors的組，只允許屬於該組的用戶具有某些權限，即編輯，添加和刪除課程對象。 在ManageCourseList查看其是負責呈現當前用戶創建的課程，我試圖覆蓋get_context_data方法傳遞的附加「group_list中」包含用戶所屬的組參數至。 我試圖在模板ManageCourseList視圖呈現中訪問它。 雖然當前用戶屬於教師組，但問題仍然是呈現其他條件數據。 請幫幫忙，我的文件：

Views.py

from django.shortcuts import render 
from django.core.urlresolvers import reverse_lazy 
from django.views.generic.list import ListView 
from django.views.generic.edit import CreateView,UpdateView,DeleteView 
from django.contrib.auth.mixins import LoginRequiredMixin,PermissionRequiredMixin 

from .models import Course 


class OwnerMixin(object): 
    def get_queryset(self): 
     qs = super(OwnerMixin,self).get_queryset() 

     return qs.filter(owner=self.request.user) 

class OwnerEditMixin(object): 
    def form_valid(self,form): 
     form.instance.owner = self.request.user 
     return super(OwnerEditMixin, self).form_valid(form) 

class OwnerCourseMixin(OwnerMixin,LoginRequiredMixin): 
    model = Course 
    fields = ['subject','title','slug','overview'] # why use this attribute? 
    success_url = reverse_lazy('courses:manage_course_list') # use of it? 

class OwnerCourseEditMixin(OwnerCourseMixin,OwnerEditMixin): 
    fields = ['subject','title','slug','overview'] 
    success_url = reverse_lazy('courses:manage_course_list') 
    template_name = 'courses/manage/course/form.html' 

class ManageCourseListView(OwnerCourseMixin,ListView): 
    template_name = 'courses/manage/course/list.html' 

    def get_context_data(self, **kwargs): 
     context = super(ManageCourseListView,self).get_context_data(**kwargs) 
     context['group_list'] = self.request.user.groups.all() 
     return context 

list.html

{% extends "base.html" %} 

{% block title %}My courses{% endblock %} 

{% block content %} 
    {% if group_list.0 == "Instructors" %} 
    <h1>My courses</h1> 
     <div class="module"> 
      {% for course in object_list %} 
       <div class="course-info"> 
        <h3>{{ course.title }}</h3> 
        <p> 
         <a href="{% url 'courses:course_edit' course.id %}">Edit</a> 
         <a href="{% url 'courses:course_delete' course.id %}">Delete</a> 
        </p> 
       </div> 
      {% empty %} 
       <p>You haven't created any courses yet.</p> 
      {% endfor %} 
      <p> 
       <a href="{% url 'courses:course_create' %}" class="button">Create new course</a> 
      </p> 
     </div> 

    {% else %} 
    <h1>No courses to display</h1> 
    {% endif %} 

{% endblock %} 

Answer 1

首先，該方法是沒有意義的，因爲它是;您只需在模板中訪問user.groups即可。

其次，組中的每個項目是一個Group對象，而不是一個字符串。所以你的狀況永遠不會成功。您需要與group.name進行比較。另外，導師將成爲第一批教師也是遠遠不能確定的。

爲了解決這個問題，我會重寫你get_context_data添加一個導師標誌，而不是組列表：

def get_context_data(self, **kwargs): 
    context = super(ManageCourseListView,self).get_context_data(**kwargs) 
    context['user_is_instructor'] = self.request.user.groups.filter(name='Instructors').exists() 
    return context 

現在在模板：

{% if user_is_instructor %}