Django-Nonrel与Mongodb listfield

Question

我想在mongodb上实现django-nonrel中的manytomany字段关系。它是在suggessted到：

Django-nonrel form field for ListField

继接受的答案

models.py

class MyClass(models.Model): 
    field = ListField(models.ForeignKey(AnotherClass)) 

我不知道在哪里下面去，它已经在fields.py测试，widgets，py，models.py

class ModelListField(ListField): 
    def formfield(self, **kwargs): 
    return FormListField(**kwargs) 

class ListFieldWidget(SelectMultiple): 
    pass 

class FormListField(MultipleChoiceField): 
    """ 
    This is a custom form field that can display a ModelListField as a Multiple Select GUI element. 
    """ 
    widget = ListFieldWidget 

    def clean(self, value): 
    #TODO: clean your data in whatever way is correct in your case and return cleaned data instead of just the value 
    return value 

admin.py

class MyClassAdmin(admin.ModelAdmin): 
    form = MyClassForm 

    def __init__(self, model, admin_site): 
    super(MyClassAdmin,self).__init__(model, admin_site) 

admin.site.register(MyClass, MyClassAdmin) 

以下错误不断弹出：

如果中间自定义类代码在models.py使用

name 'SelectMultiple' is not defined 

如果自定义类别代码被带下models.py：

No form field implemented for <class 'djangotoolbox.fields.ListField'> 

Answer 1

你只需要通过它的声音导入SelectMultiple。你可以把这些代码放在这三个文件中的任何一个中，fields.py是有意义的。

因为它是非常常用的有：

from django import forms 

在你的文件的顶部已经，你可能只是想编辑下面的代码：

# you'll have to work out how to import the Mongo ListField for yourself :) 
class ModelListField(ListField): 
    def formfield(self, **kwargs): 
    return FormListField(**kwargs) 

class ListFieldWidget(forms.SelectMultiple): 
    pass 

class FormListField(forms.MultipleChoiceField): 
    """ 
    This is a custom form field that can display a ModelListField as a Multiple Select GUI element. 
    """ 
    widget = ListFieldWidget 

    def clean(self, value): 
    #TODO: clean your data in whatever way is correct in your case and return cleaned data instead of just the value 
    return value 

你可能也想试试并学习更多关于Python如何工作，如何导入模块等。