將請求傳遞給Django Admin中的內聯表單？

Question

我想從Django Admin中的請求中獲取用戶。我需要的是通過內聯表格的clean()方法訪問請求的用戶。我用一個正常的ModelForm（即不是內聯的）完成了一個類似於下面描述的程序，並且我成功了。但是，在內聯中，我遇到了很多問題。 我：

class SaleFormset(BaseInlineFormSet): 
    def __init__(self, *args, **kwargs): 
     self.request = kwargs.pop('request') 
     super(SaleFormset, self).__init__(*args, **kwargs) 

    def _construct_form(self, i, **kwargs): 
     kwargs['request'] = self.request 
     super(SaleFormset, self)._construct_form(i, **kwargs) 


class SaleProductItemInlineForm(ModelForm): 
    """ 
    Custom form for the Sale Product Item Inline used by the 
    Sale Admin form. 
    """ 

    def __init__(self, *args, **kwargs): 
     self.request = kwargs.pop('request') 
     super(SaleProductItemInlineForm, self).__init__(*args, **kwargs) 

    class Meta: 
     model = SaleProductItem 
     fields = "__all__" 

而在admin.py，我有：

class SaleProductItemInline(admin.TabularInline): 
    """ 
    Tabular inline for a SaleProductItem used in the Sale Admin. 
    """ 
    model = models.SaleProductItem 
    form = SaleProductItemInlineForm 
    formset = SaleFormset 

    def get_formset(self, request, obj=None, **kwargs): 
     formset_class = super(SaleProductItemInline, self).get_formset(request, obj, **kwargs) 

     class Subset(formset_class): 
      def __new__(cls, *args, **kwargs): 
       kwargs['request'] = request 
       return formset_class(*args, **kwargs) 

     return Subset 

但是，我得到一個錯誤，指出'NoneType' object has no attribute 'media'因爲這部分的：

@property 
def media(self): 
    # All the forms on a FormSet are the same, so you only need to 
    # interrogate the first form for media. 
    if self.forms: 
     return self.forms[0].media 

Answer 1

類似於此的方法適用於我：

def SaleProductItemInlineFormFactory(request): 
    class SaleProductItemInlineForm(ModelForm): 
     def __init__(self, *args, **kwargs): 
      # here finally you can do something with your request 
      super(SaleProductItemInlineForm, self).__init__(*args, **kwargs) 

     class Meta: 
      model = SaleProductItem 
      fields = "__all__" 
    return SaleProductItemInlineForm 

def SaleProductItemInlineFactory(request): 
    class SaleProductItemInline(admin.TabularInline): 
     model = models.SaleProductItem 
     form = SaleProductItemInlineFormFactory(request) 

    return SaleProductItemInline 

class SaleAdmin(admin.ModelAdmin): 
    inlines =() 

    # such way we send request to main form 
    def get_form(self, request, obj=None, **kwargs): 
     form = super(SaleAdmin, self).get_form(request, obj=obj, **kwargs) 
     form.request = request 
     return form 

    # we define inlines with factory to create Inline class with request inside 
    def change_view(self, request, object_id, form_url='', extra_context=None): 
     self.inlines = (SaleProductItemInlineFactory(request),) 
     return super(SaleAdmin, self).change_view(request, object_id) 

    # we define inlines with factory to create Inline class with request inside 
    def add_view(self, request, form_url='', extra_context=None): 
     self.inlines = (SaleProductItemInlineFactory(request),) 
     return super(SaleAdmin, self).add_view(request) 

Answer 2

您的解決方案的快捷方式是：

class SaleFormset(BaseInlineFormSet): 

    def _construct_form(self, i, **kwargs): 
     form = super(SaleFormset, self)._construct_form(i, **kwargs) 
     form.request = self.request 
     return form 

class SaleProductItemInline(admin.TabularInline): 
    model = models.SaleProductItem 
    form = SaleProductItemInlineForm 
    formset = SaleFormset 

    def get_formset(self, request, obj=None, **kwargs): 
     formset = super(SaleProductItemInline, self).get_formset(request, obj, **kwargs) 
     formset.request = request 
     return formset