在上下文中传递用户的组名并在 django 的模板中访问

Question

我在我的 Django 应用程序中使用了基于 class 的视图的混合。我还创建了一个名为 Instructors 的组，只允许属于该组的用户拥有某些权限，即编辑、添加和删除课程对象。在负责呈现当前用户创建的课程的 ManageCourseList View 中，我试图覆盖 get_context_data 方法传递额外的 'group_list' 参数，其中包含用户所属的组。我试图在模板 ManageCourseList 视图呈现中访问它。问题是虽然当前用户属于 Instructors 组，但它仍然呈现 else 条件数据。请帮助，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，这种方法毫无意义；您可以简单地在模板中访问 user.groups。

其次，组中的每一项都是一个组对象，而不是一个字符串。所以你的条件永远不会成功；您需要与 group.name 进行比较。另外，也很难确定讲师会是第一批。

为了解决这个问题，我会重写你的 get_context_data 以添加一个教师标志而不是小组列表：

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

现在在模板中：

{% if user_is_instructor %}

在上下文中传递用户的组名并在 django 的模板中访问

Passing group name of a user in context and accessing in template in django

django

templates

django-class-based-views