Django添加一个字段到模型 - 字段不显示在窗体上

Question

我一直在寻找整夜寻找答案，但似乎无法找到问题所在。

我的工作移植自定义CMS以Django的，基本上具有以下结构：

• 中的一个条目1布局
• 布局有许多部分

所以后用户创建并输入，当他们编辑它时，我想显示该布局中包含的所有部分。

所以我从入口获取布局ID，通过循环而得到的部分，并试图将它们添加到窗体。

当我调试它，它看起来像被添加的一切对象的字段就好了，但它并没有在表格上显示，除非我预定义的领域，这会破坏目的

我有随后的几个例子在这里和已经得到这个代码：

class EntryChangeForm(forms.ModelForm): 

def __init__(self, *args, **kwargs): 
    super(EntryChangeForm, self).__init__(*args, **kwargs) 
    layout = Layout.objects.filter(id=self.instance.layout_id) 
    layout_sections = Section.objects.filter(layout_id=layout) 
    for section in layout_sections: 
     self.fields['section_%d' % section.id] = models.CharField(max_length=200, verbose_name=section.section_label) 
     current_section = Data.objects.filter(page_id=self.instance.id, section_id=section.id, content_table_id=2) 
     if current_section: 
      self.fields['section_%d' % section.id.initla] = current_section.text 
     else: 
      self.fields['section_%d' % section.id].initial = "" 

当我调试的例子和打印self.fields

{'layout': 
<django.forms.models.ModelChoiceField object at 0x1c30b50>, 
'uid': <django.forms.fields.IntegerField object at 0x1c30c50>, 
'url': <django.forms.fields.CharField object at 0x1c30cd0>, 
'url_301': <django.forms.fields.CharField object at 0x1c30d50>, 
'name': <django.forms.fields.CharField object at 0x1c30dd0>, 
'page_title': <django.forms.fields.CharField object at 0x1c30e50>, 
'meta_description': 
<django.forms.fields.CharField object at 0x1c30ed0>, 
'meta_keywords': <django.forms.fields.CharField object at 0x1c30f50>, 
'order_fld': <django.forms.fields.CharField object at 0x1c30fd0>, 
'user_id': <django.forms.fields.IntegerField object at 0x1c32090>, 
'author': <django.forms.models.ModelChoiceField object at 0x1c32110>, 
'date_active': <django.forms.fields.SplitDateTimeField object at 0x1c32210>, 
'date_added': <django.forms.fields.SplitDateTimeField object at 0x1c32290>, 'date_modified': <django.forms.fields.SplitDateTimeField object at 0x1c32390>, 'date_expires': <django.forms.fields.SplitDateTimeField object at 0x1c32490>, 'date_published': <django.forms.fields.SplitDateTimeField object at 0x1c32590>, 'is_active': <django.forms.fields.TypedChoiceField object at 0x1c32690>, 'hide_from_dropdown': <django.forms.fields.TypedChoiceField object at 0x1c32790>, 'is_featured': 
<django.forms.fields.TypedChoiceField object at 0x1c32810>, 
'in_sitemap': <django.forms.fields.TypedChoiceField object at 0x1c32890>, 
'admin_user_id': <django.forms.fields.IntegerField object at 0x1c32910>, 'show_large_photo': <django.forms.fields.TypedChoiceField object at 0x1c32990>, 'is_featured_on_homepage': <django.forms.fields.TypedChoiceField object at 0x1c32a10>, 'capitalize_first_letter': <django.forms.fields.TypedChoiceField object at 0x1c32a90>, 'display_share_box': <django.forms.fields.TypedChoiceField object at 0x1c32b10>, 'display_subscribe_box': <django.forms.fields.TypedChoiceField object at 0x1c32b90>, 'is_commenting_enabled': <django.forms.fields.TypedChoiceField object at 0x1c32c10>, 'legacy_import': 
<django.forms.fields.TypedChoiceField object at 0x1c32c90>, 
'section': <django.db.models.fields.CharField>, 
'section_3': <django.db.models.fields.CharField>, 
'section_2': <django.db.models.fields.CharField>, 
'section_4': <django.db.models.fields.CharField>} 


{'layout': 
<django.forms.models.ModelChoiceField object at 0x1c30b50>, 
'uid': <django.forms.fields.IntegerField object at 0x1c30c50>, 
'url': <django.forms.fields.CharField object at 0x1c30cd0>, 
'url_301': <django.forms.fields.CharField object at 0x1c30d50>, 
'name': <django.forms.fields.CharField object at 0x1c30dd0>, 
'page_title': <django.forms.fields.CharField object at 0x1c30e50>, 
'meta_description': <django.forms.fields.CharField object at 0x1c30ed0>, 
'meta_keywords': <django.forms.fields.CharField object at 0x1c30f50>, 
'order_fld': <django.forms.fields.CharField object at 0x1c30fd0>, 
'user_id': <django.forms.fields.IntegerField object at 0x1c32090>, 
'author': <django.forms.models.ModelChoiceField object at 0x1c32110>, 
'date_active': <django.forms.fields.SplitDateTimeField object at 0x1c32210>, 
'date_added': <django.forms.fields.SplitDateTimeField object at 0x1c32290>, 'date_modified': <django.forms.fields.SplitDateTimeField object at 0x1c32390>, 'date_expires': <django.forms.fields.SplitDateTimeField object at 0x1c32490>, 'date_published': <django.forms.fields.SplitDateTimeField object at 0x1c32590>, 'is_active': <django.forms.fields.TypedChoiceField object at 0x1c32690>, 'hide_from_dropdown': <django.forms.fields.TypedChoiceField object at 0x1c32790>, 'is_featured': <django.forms.fields.TypedChoiceField object at 0x1c32810>, 
'in_sitemap': <django.forms.fields.TypedChoiceField object at 0x1c32890>, 
'admin_user_id': <django.forms.fields.IntegerField object at 0x1c32910>, 'show_large_photo': <django.forms.fields.TypedChoiceField object at 0x1c32990>, 'is_featured_on_homepage': <django.forms.fields.TypedChoiceField object at 0x1c32a10>, 'capitalize_first_letter': <django.forms.fields.TypedChoiceField object at 0x1c32a90>, 'display_share_box': <django.forms.fields.TypedChoiceField object at 0x1c32b10>, 'display_subscribe_box': <django.forms.fields.TypedChoiceField object at 0x1c32b90>, 'is_commenting_enabled': <django.forms.fields.TypedChoiceField object at 0x1c32c10>, 'legacy_import': <django.forms.fields.TypedChoiceField object at 0x1c32c90>, 
'section': <django.db.models.fields.CharField>, 
'section_3': <django.db.models.fields.CharField>, 
'section_2': <django.db.models.fields.CharField>, 
'section_4': <django.db.models.fields.CharField>} 

我可以看到obvi我添加的字段与已经在 模型中的字段有所不同：'legacy_import': <django.forms.fields.TypedChoiceField object at 0x1c32c90>, 'section': <django.db.models.fields.CharField>, 但不确定如何解决此问题。

Answer 1

找到了答案。

https://code.djangoproject.com/ticket/12238

显然有与添加字段ModelForms的错误。

应用在链接的上面options.py评论中发现的变化似乎已经解决了这个问题，并在字段现在显示在表格上。

我已经解决了这个在此期间通过更新的contrib /管理/ options.py ：

def get_fieldsets(self, request, obj=None): 
    "Hook for specifying fieldsets for the add form." 
    if self.declared_fieldsets: 
     return self.declared_fieldsets 
    #form = self.get_form(request, obj) 
    #return [(None, {'fields': form.base_fields.keys()})] 
    form = self.get_form(request, obj)(instance=obj) 
    return [(None, {'fields': form.fields.keys()})] 

Answer 2

机会可能是，如果你没有在你的模型中定义主键，然后根据你的名为id或东西列Django的环境设置将自动作为主键来创建。或者它可能是，如果你直接在db中定义一些列，但要做到这一点，你需要在django模型中编写它们的映射。看到你的模型SQL只是去终端和输入：

# python manage.py sql [appname] 

现在将有由django为您生成的表sql。所以你可以看到专栏。

Answer 3

这是一个表单，而不是一个模型，所以你想添加表单字段，而不是模型字段。

self.fields['section_%d' % section.id] = forms.CharField(max_length=200, label=section.section_label)