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1.) 我有以下 models.py 定义：

    from django.db import models
    from datetime import date

    class Author(models.Model):
        author  = models.CharField(max_length=20)
        def __unicode__(self):
            return '%s' % (self.author)

    class SystemA(models.Model):
        author      = models.ForeignKey(Author)
        date        = models.DateField()
        system      = models.CharField(max_length=20, blank=False, default="System A")
        description = models.CharField(max_length=300)
        status = models.CharField(max_length=6)
        def __unicode__(self):
            return '%s, %s, %s, %s, %s' % (self.date, self.author, self.system, self.description, self.status)

    class SystemB(models.Model):
        author      = models.ForeignKey(Author)
        date        = models.DateField()
        system      = models.CharField(max_length=20, blank=False, default="System B")
        description = models.CharField(max_length=300)
        status = models.CharField(max_length=6)
        def __unicode__(self):
            return '%s, %s, %s, %s, %s' % (self.date, self.author, self.system, self.description, self.status)

2.) 这个 admin.py 定义：

    from acc.models import SystemA, SystemB, Author
    from django.contrib import admin

    admin.site.register(SystemA)
    admin.site.register(SystemB)

3.）这是我的views.py定义：

    from django.http import HttpResponse
    from acc.models import SystemA, SystemB
    from django.template import Context, loader
    from itertools import chain
    from operator import attrgetter

    def index(request):
      a_list = SystemA.objects.all().order_by('-date')
      b_list = SystemB.objects.all().order_by('-date')
      result_list = sorted(
        chain(a_list, b_list),
        key=attrgetter('date'))
      t = loader.get_template('index.html')
      #c = Context({'result_list': result_list,})
      c = Context({'a_list': a_list,'b_list': b_list,})
      return HttpResponse(t.render(c))

4.) 最后，呈现静态 HTML 页面 (index.html) 的模板定义为：

    {% if a_list %}
    <ul>
    {% for a in a_list %}
    <li>{{a.date}} | {{a.author}} | {{a.system}} | {{a.description}} | {{a.status}}</li>
    {% endfor %}
    </ul>
    {% endif %}

    {% if b_list %}
    <ul>
    {% for b in b_list %}
    <li>{{b.date}} | {{b.author}} | {{b.system}} | {{b.description}} | {{b.status}}</li>
    {% endfor %}
    </ul>
    {% endif %}

代码正在运行，我已经从管理界面输入了一些数据。结果：

April 18, 2013 | owta | System A | All jobs went bananas! | FAILED
April 17, 2013 | rash | System A | All Well | OK

April 18, 2013 | owta | System B | All jobs went bananas! | FAILED
April 17, 2013 | rash | System B | All well | OK

我的目标是获得按日期排序的结果，独立于模型（SystemA/SystemB），按以下排序顺序：

April 17, 2013 | rash | System A | All Well | OK
April 17, 2013 | rash | System B | All well | OK
April 18, 2013 | owta | System A | All jobs went bananas! | FAILED
April 18, 2013 | owta | System B | All jobs went bananas! | FAILED

我花了半周的时间试图解决这个问题，但没有成功，而且我是 Django 的菜鸟。一些帮助将不胜感激！谢谢。

4

1 回答 1

1

“我以前使用单一模型解决方案，但不知何故觉得我必须为我的系统提供不同的类/模型，以便将数据很好地提取到从每个系统按日期排序的静态页面中”

皮疹，这就是你用一个模型做的事情。请记住，始终尽量减少系统中的重复。

模型.py

from django.db import models

class Author(models.Model):
    author  = models.CharField(max_length=20)
    def __unicode__(self):
        return '%s' % (self.author)

class System(models.Model):
    SYSTEM_CHOICES = (('A','System A'),('B','System B'))
    author      = models.ForeignKey(Author)
    date        = models.DateField()
    system      = models.CharField(max_length=1, choices=SYSTEM_CHOICES) # see [1]
    description = models.CharField(max_length=300)
    status      = models.CharField(max_length=6)

管理员.py

from django.contrib import admin

class SystemAdmin(admin.ModelAdmin):
    list_filter = ['system'] # See [2]

admin.site.register(System, SystemAdmin)

网址.py

url(r'^/system/(?P<system>A|B)/list/$', views.SystemListView.as_view(), name='system-list' )

视图.py

from django.views.generic.list import ListView
from .models import System

class SystemListView(ListView):
    model = System
    context_object_name = "Systems"

    def get_queryset(self):
        return super(SystemListView, self) \
          .filter(system = self.kwargs['system']) \
          .order_by(self.request.GET.get('sort') or '-date')

{template_folder}/yourapp/system/list.html

<h1> System {{ system }}{# See [3] #} </h1>
<ul>
{% for sys in Systems %}
  <li>{{sys.date}} | {{sys.author}} | {{sys.description}} | {{sys.status}}</li>
{% endfor %}
</ul>

附录

[1] https://docs.djangoproject.com/en/stable/ref/models/fields/#choices
[2] https://docs.djangoproject.com/en/stable/ref/contrib/admin/#django.contrib.admin.ModelAdmin.list_filter
[3] https://github.com/django/django/blob/master/django/views/generic/detail.py#L99
于 2013-04-18T14:08:03.057 回答