在模板中显示 django-reversion 的 field_dict.items()

Posted 2023-02-24

【中文标题】在模板中显示 django-reversion 的 field_dict.items()

【英文标题】：Show field_dict.items() of django-reversion in template

【发布时间】：2017-08-22 14:42:12

【问题描述】：

我想在我的项目中使用django reversion 应用程序。我有点困惑。如何在模板中显示更改列表（field_dict.items()）？

models.py：

@reversion.register()
class Function(models.Model):
    ***FIELDS***

views.py：

def function_revisions(request, function_code):
    function = get_object_or_404(Function, pk=function_code)
    versions = Version.objects.get_for_object(Function)
    context = 
        'function': function,
        'versions': versions,
    
    return render(request, 'project/function_revisions.html', context)

function_revisions.html：

% for version in versions %
     <p>Version:  forloop.counter .</p>
     <p>Revision by  version.revision.user .</p>
     <p>Date of revision :  version.revision.date_created .</p>

     % for field_name, field_value in version.field_dict.items() % <-- ???
         <p>Field </p> field_name  had the value  field_value <p>
     % endfor %
% endfor %

错误：

Traceback (most recent call last):
  File "C:\Users\Nurzhan\PycharmProjects\RMS\project\views.py", line 231, in function_revisions
    versions = Version.objects.get_for_object(Function)
  File "C:\Users\Nurzhan\AppData\Local\Programs\Python\Python35-32\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "C:\Users\Nurzhan\AppData\Local\Programs\Python\Python35-32\lib\site-packages\reversion\models.py", line 118, in get_for_object
    return self.get_for_object_reference(obj.__class__, obj.pk, model_db=model_db)
  File "C:\Users\Nurzhan\AppData\Local\Programs\Python\Python35-32\lib\site-packages\reversion\models.py", line 113, in get_for_object_reference
    return self.get_for_model(model, model_db=model_db).filter(
  File "C:\Users\Nurzhan\AppData\Local\Programs\Python\Python35-32\lib\site-packages\reversion\models.py", line 106, in get_for_model
    content_type = _get_content_type(model, self.db)
  File "C:\Users\Nurzhan\AppData\Local\Programs\Python\Python35-32\lib\site-packages\reversion\revisions.py", line 402, in _get_content_type
    version_options = _get_options(model)
  File "C:\Users\Nurzhan\AppData\Local\Programs\Python\Python35-32\lib\site-packages\reversion\revisions.py", line 388, in _get_options
    _assert_registered(model)
  File "C:\Users\Nurzhan\AppData\Local\Programs\Python\Python35-32\lib\site-packages\reversion\revisions.py", line 381, in _assert_registered
    if not is_registered(model):
  File "C:\Users\Nurzhan\AppData\Local\Programs\Python\Python35-32\lib\site-packages\reversion\revisions.py", line 319, in is_registered
    return _get_registration_key(model) in _registered_models
  File "C:\Users\Nurzhan\AppData\Local\Programs\Python\Python35-32\lib\site-packages\reversion\revisions.py", line 312, in _get_registration_key
    return (model._meta.app_label, model._meta.model_name)
AttributeError: type object 'ModelBase' has no attribute '_meta'

【参考方案1】：

去掉括号，Django 模板引擎会为你调用：

% for field_name, field_value in version.field_dict.items %

这适用于采用零参数的方法。

【讨论】：

请再看我的帖子。尝试打开页面时出现错误。它说 AttributeError: type object 'ModelBase' has no attribute '_meta' 只有视图函数有问题。你对此有什么想法吗？

【参考方案2】：

您将错误的东西传递给get_for_object - 您需要传递实例function，而不是模型Function。

【讨论】：

versions = Version.objects.get_for_object(Function.objects.get(pk=id))