Django添加一個字段到模型 - 字段不顯示在窗體上

Question

我一直在尋找整夜尋找答案，但似乎無法找到問題所在。

我的工作移植自定義CMS以Django的，基本上具有以下結構：

• 中的一個條目1佈局
• 佈局有許多部分

所以後用戶創建並輸入，當他們編輯它時，我想顯示該佈局中包含的所有部分。

所以我從入口獲取佈局ID，通過循環而得到的部分，並試圖將它們添加到窗體。

當我調試它，它看起來像被添加的一切對象的字段就好了，但它並沒有在表格上顯示，除非我預定義的領域，這會破壞目的

我有隨後的幾個例子在這裏和已經得到這個代碼：

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 = "" 

當我調試的例子和打印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我添加的字段與已經在 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>, 但不確定如何解決此問題。

Answer 1

找到了答案。

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

顯然有與添加字段ModelForms的錯誤。

應用在鏈接的上面options.py評論中發現的變化似乎已經解決了這個問題，並在字段現在顯示在表格上。

我已經解決了這個在此期間通過更新的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

機會可能是，如果你沒有在你的模型中定義主鍵，然後根據你的名爲id或東西列Django的環境設置將自動作爲主鍵來創建。或者它可能是，如果你直接在db中定義一些列，但要做到這一點，你需要在django模型中編寫它們的映射。看到你的模型SQL只是去終端和輸入：

# python manage.py sql [appname] 

現在將有由django爲您生成的表sql。所以你可以看到專欄。

Answer 3

這是一個表單，而不是一個模型，所以你想添加表單字段，而不是模型字段。

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