将参数传递给Django Modelform的元类

Question

我有一些模型具有如下公共字段：

class Model_1(models.Model):
    field_1 
    field_2
    field_3
    # Other fields
class Model_2(models.Model):
    field_1 
    field_2
    field_3
    # Other fields

然后我想为他们两个创建一个表单，如下所示：

class CommonForm(forms.ModelForm):
    class Meta:
         variable_of_name_of_model = that pass to Meta class
         # this condition check for 
         if  variable_of_name_of_model == 'Model_1':
             model = Model_1
         elif variable_of_name_of_model == 'Model_2':
             model = Model_2
         fields = ['field_1', 'field_2', 'field_3']

在这个表单中，我检查已传递给Meta类的variable_of_name_of_model 然后做点什么

我该怎么做？另一方面，如何将参数传递给Meta类

Answer 1

您可以使用一种fabrik方法：

def get_form_class(model_name,data, instance):
    class CommonForm(forms.ModelForm):
        class Meta:
            model = model_name
            fields = ['field_1', 'field_2', 'field_3']
        form = CommonForm(data=data, instance=instance)
        return form

只需在您想使用它的地方使用模型名（视图？）即可。大概是这样的：

form = get_form_class(model_name=ModelName, data=request.POST, instance=instance,)