如何将参数传递给Django中的表单类？

Question

我想将产品ID传递给我的表单类，以便在我的数据库中创建一个包含该项目的表单。

我的表格：

class Order_form(forms.Form):
    def __init__(self, product_id,*args,**kwargs):

        self.add_option = forms.ModelMultipleChoiceField(widget = forms.CheckboxSelectMultiple, required = False, queryset=product.objects.get(id = product_id).add_option.all())
        super(Order_form,self).__init__(*args,**kwargs)

上面的表单没有创建任何东西，但这个表单正在创建我需要的东西。 但是，我需要动态传递product_id ，而不必将1作为id硬编码：

class Order_form2(forms.Form):
    add_option = forms.ModelMultipleChoiceField(widget = forms.CheckboxSelectMultiple, required = False, queryset=product.objects.get(id = 1).add_option.all())

PS：一切正常，感谢下面的回答和评论，现在我的表格看起来像那样

class Order_form(forms.Form):
    add_option = forms.ModelMultipleChoiceField(widget = forms.CheckboxSelectMultiple, required = False, queryset=None)
    def __init__(self, product_id,*args,**kwargs):
        super(Order_form, self).__init__(*args, **kwargs)
        self.fields['add_option'].queryset=product.objects.get(id = product_id).add_option.all()

Answer 1

这大致应该是它的样子。

class Order_form(forms.Form):
    def __init__(self, product_id,*args,**kwargs):
        super().__init__(product_id, *args, **kwargs) # This is the default stuff that forms.Form does

         # You need to add this part so that it edits the field after creation
        self.fields['add_option']= forms.ModelMultipleChoiceField(widget = forms.CheckboxSelectMultiple, required = False, queryset=product.objects.get(id = product_id).add_option.all())
        # super(Order_form,self).__init__(*args,**kwargs) this  would re-overwrite it so we don't want it here

这通常是在django中完成的。