Django：如何在模型的clean方法中获取动态添加的表单字段

Question

我对Django相当陌生。以下是我想要实现的目标

我正在根据从视图中获得的模型 (configurable_product_options_model( 在表单上动态添加一些字段。我的想法是利用这些动态添加的字段来创建激活记录(激活记录(模型。模型((。我无法在我的模型 ActivationRecord 的干净函数中掌握这些字段(这些字段都没有映射到我的模型中的数据字段 [很明显](，以创建一些保存在数据库中的条目。

视图

def activation_record(request):
configurable_product_options_modeltouse = None 
product_options_modeltouse = None
if request.session['feature_name'] == "M-Vault" :
product_options_modeltouse = MLink_Product_Options
configurable_product_options_modeltouse = MLink_Configurable_Product_Options
# if this is a POST request we need to process the form data
if request.method == 'POST':
# create a form instance and populate it with data from the request:
feature = request.session['feature_name']
form = ActivationRecordForm (request.POST, product_options_model = product_options_modeltouse, 
configurable_product_options_model = configurable_product_options_modeltouse)
# check whether it's valid:
if form.is_valid():
# process the data in form.cleaned_data as required
# redirect to a new URL: 
form.save()
return redirect('/admin/sales_portal/activationrequest/')
# if a GET (or any other method) we'll create a blank form
else:
form = ActivationRecordForm(initial={'feature_name' : request.session['feature_name'],
'customer_reference' : request.session['customer_reference'],
'host_method'  : request.session['host_method'],
'host_id'      : request.session['host_id'],
'activation_type' : request.session['activation_type']}, 
product_options_model = product_options_modeltouse,
configurable_product_options_model = configurable_product_options_modeltouse)
# Disabled the populatd fieds in the ISODE activation record form
form.fields['host_id'].widget.attrs['readonly'] = True
return render(request, 'sales_portal/activation_record.html', {'form': form})

形式

class ActivationRecordForm (ModelForm) :
def __init__(self, *args, **kwargs) :
# Populate product options from the model based on the feature in the activation request
product_options_model = kwargs.pop('product_options_model')
configurable_product_options_model = kwargs.pop('configurable_product_options_model')
super(ActivationRecordForm, self).__init__(*args, **kwargs)
# Add product options in the form
if product_options_model :
self.fields['sub_feature'] = forms.ModelMultipleChoiceField(label='Product Options ', 
required=False, 
queryset = product_options_model.objects.all())
# Add configurable product options in the form
if configurable_product_options_model : 
queryset = configurable_product_options_model.objects.all()
for configurable_product_options in queryset :
name = "%s " % configurable_product_options
self.fields[name] = forms.CharField(required=False, 
widget=forms.TextInput(attrs={'id':'CONFIGURABLE_PRODUCT_OPTION'}))

在激活记录模型的清理函数中，我想利用这些动态添加的字段中填写的数据("%s"%configurable_product_options(。我正在尝试自己弄清楚(我相信一定有一种非常简单的方法可以做到这一点，但如果有人能给我一个提示，我将不胜感激(。尝试get_fields((，但它没有列出表单上动态添加的字段。

class ActivationRecord (models.Model) :
def clean (self) :
fields = self._meta.get_fields() 

Answer 1

我意识到这样做的正确方法(也许(不是在模型中，而是在我的观点中。 想法是在不保存表单(commit=False(的情况下获取模型对象，然后在再次保存之前根据可配置参数对其进行修改。

if request.method == 'POST':
feature = request.session['feature_name']
form = ActivationRecordForm (request.POST, product_options_model = product_options_modeltouse, 
configurable_product_options_model = configurable_product_options_modeltouse)
# check whether it's valid:
if form.is_valid():
queryset = configurable_product_options_modeltouse.objects.all()
product_options = []
for configurable_product_options in queryset :
if form.cleaned_data["%s " % configurable_product_options] :
val = str(configurable_product_options) # Get the label
val = val.replace(" ", "") # Remove spaces from the label
val = val.lower() # Make the label lowercase
val = val+"="+str(form.cleaned_data["%s " % configurable_product_options])  
product_options.append(val)
# modify the activation record with the configurable product options before 
# saving the form and redirecting to a new URL: 
if product_options :
activation_record_object = form.save(commit=False)
activation_record_object.sub_feature = str(activation_record_object.sub_feature)+ "," + ",".join(product_options)
form.save()