1

根据Django 官方网址

models.py

from django.db import models
    class Publisher(models.Model):
        name = models.CharField(max_length=30)
        address = models.CharField(max_length=50)
        city = models.CharField(max_length=60)
        state_province = models.CharField(max_length=30)
        ...

views.py

from django.views.generic import ListView
from books.models import Publisher

class PublisherList(ListView):
    model = Publisher

urls.py

from django.urls import path
from books.views import PublisherList

urlpatterns = [
    path('publishers/', PublisherList.as_view()),
]

在模板中,一个名为的变量object_list包含所有发布者对象。

{% extends "base.html" %}

{% block content %}
    <h2>Publishers</h2>
    <ul>
        {% for publisher in object_list %}
            <li>{{ publisher.name }}</li>
        {% endfor %}
    </ul>
{% endblock %}

我一直在深入研究 django 的源代码,以找出 Django 将Publisher模型的所有对象明确放入模板上下文 ( object_list) 的确切位置。但是到目前为止还没有运气,有人可以分享一些见解吗?

4

1 回答 1

2

ListView是 的子类BaseListView。该object_list属性在此处初始化:

class BaseListView(MultipleObjectMixin, View):
    """A base view for displaying a list of objects."""
    def get(self, request, *args, **kwargs):
        self.object_list = self.get_queryset()  # <--
        ...

并且该.get_queryset()方法的默认实现定义在MultipleObjectMixin

def get_queryset(self):
    """
    Return the list of items for this view.
    The return value must be an iterable and may be an instance of
    `QuerySet` in which case `QuerySet` specific behavior will be enabled.
    """
    ...
于 2021-05-12T23:23:33.587 回答