django - 有没有办法在 Django 内联表单集清理方法中访问请求对象？

Question

得到这个带有内联和表单类的管理类:

class InvoiceAdmin(admin.ModelAdmin):
    ....
    inlines = [InvoiceLineInline, ]
    form = InvoiceForm
    ....

class InvoiceForm(forms.ModelForm):
    ....
    def clean():
        ....

    class Meta:
        model = Invoice
        exclude = []


class InvoiceLineInline(admin.TabularInline):
    model = InvoiceLine
    formset = InvoiceLineInlineFormset
    extra = 1


class InvoiceLineInlineFormset(forms.models.BaseInlineFormSet):
    def clean(self):
        super(InvoiceLineInlineFormset, self).clean()

        count = 0
        for form in self.forms:
            if not hasattr(form, 'cleaned_data'):
                continue

            data = form.cleaned_data
            try:
                if data:
                    count += 1
                else:
                    continue
            except AttributeError:
                pass

            if Decimal(data.get('quantity', 0)) <= 0:
                raise forms.ValidationError("Amount should be greater than 0.")
            ******************************************************
            _stock_code = data.get('stock_code', None)
            if not len(fetch_stocks_from_connector(request, stock_code=_stock_code)):
                raise forms.ValidationError("{} Stock code does not exist at connector.".format(_stock_code))
            ******************************************************    
        if count < 1:
            raise forms.ValidationError('Need one line at least.')

我需要使用外部方法对 InvoiceLineInlineFormset.clean 中每个 inlineform 中的 _stock_code 值进行额外验证，如上图所示加星标的线。但是外部方法需要请求对象作为参数才能正常运行。

是否可以将请求对象传递给 clean 方法？

Answer 1

问题很老，但我会分享对我有用的解决方案ModelAdmin 有一个 get_formset 方法。你可以像这样扩展它

class YourAdminInline(admin.TabularInline):
    model = YourModel
    formset = YourInlineFormSet

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

在您的表单集中，您可以使用 self.request 访问请求对象。比如在clean方法中

class YourInlineFormset(forms.BaseInlineFormset):
    def clean(self):
        ...
        request = self.request