In Django 1.4, do Form.has_changed() and Form.changed_data, which are undocumented, work as expected?

Question

From the source code, you can see that Django 1.4\'s Form class has a has_changed() method and changed_data property which seem rather

Answer 1

Here is a piece of code that does what @Ghopper21 is suggesting. To get the initial data, I use the values() function on the QueryDict. It returns a dictionary containing the data belonging to the object. An important caveat is that I haven't checked how it handles foreign key references.

saveStudentView(request,studentID):
    existingData = Student.objects.filter(id=paperID).values()[0]
    form = StudentForm(request.POST)
    if form.is_valid():
        form = StudentForm(request.POST, initial=existingData)
        if not form.has_changed():
            //Tell the user nothing has changed
        else:
            //Do other stuff