Django多格式工厂 [英] Django multiple form factory

问题描述

处理多种形式的最佳方式是什么？我想把几种形式合并成一个。例如，我想将ImangeFormSet和EntryForm组合成一种形式：

What is the best way to deal with multiple forms? I want to combine several forms into one. For example, I want to combine ImangeFormSet and EntryForm into one form:

class ImageForm(forms.Form):
    image = forms.ImageField()
ImageFormSet = formset_factory(ImageForm)

class EntryForm(forms.Form):
    title = forms.CharField(max_length=100)

result_form = combine(EntryForm, ImageFormSet) # here it goes

我发现2年旧的演示文稿介绍了multipleform_factory（）方法，但我不确定它是最好的方法： http://www.slideshare.net/kingkilr/forms-getting-your-moneys-worth

I found 2 years old presentation introducing multipleform_factory() method, but I am not sure that it's the best way: http://www.slideshare.net/kingkilr/forms-getting-your-moneys-worth

推荐答案

p>一个想法（不检查是否有效）：

An idea (not checked if it works):

class MySuperForm(CombinedForm):
    includes = (ImageForm, EntryForm, )

你看到这里如何构建表单。您可以通过从BaseForm扩展并提供另一个 __ metaclass __ 来制作自己的表单。

You see here how the form is built. You can make your own Form by extending from BaseForm and supplying another __metaclass__.

class CombinedForm(BaseForm):
  __metaclass__ = DeclarativeFieldsMetaclassFromMultipleClasses

在DeclarativeFieldsMetaclassFromMultipleClasses中，您基本上执行与这里相同，除非你总结类中的声明字段

In DeclarativeFieldsMetaclassFromMultipleClasses you do basically the same as here, except you sum up the declared fields from the classes on

class DeclarativeFieldsMetaclassFromMultipleClasses(type):
  def __new__(cls, name, bases, attrs):
    for clazz in attrs['includes']:
      attrs['base_fields'] += get_declared_fields(bases, clazz.attrs)
    new_class = super(DeclarativeFieldsMetaclassFromMultipleClasses,cls).__new__(cls, name, bases, attrs)
    if 'media' not in attrs:
      new_class.media = media_property(new_class)
    return new_class

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