Use django, use form in django to format data, individual fields will have a default value, use initial to set the default value, but after form.is_valid, it is found that the field does not have a default value.
In django, initial is not equal to the default value, related links: here
initial={"":""}
form=ArticleModel(request.POST)
if form.has_changed():
data = {i: form.cleaned_data[i] for i in form.changed_data}
data.update({key: val for key, val in init_praram.items() if key not in form.changed_data})