I am writing a classroom test application. The models.py file is shown below.
class Student(models.Model):
name = models.CharField(max_length=50)
parent = models.CharField(max_length=50)
def __unicode__(self):
return self.name
class Grade(models.Model):
studentId = models.ForeignKey(Student)
finalGrade = models.CharField(max_length=3)
I would like to be able to change the final class for several students in the model set, but for now, I'm just trying one student at a time. I am also trying to create a form for him that shows the student’s name as a field that cannot be changed, the only thing that can be changed here is finalGrade. So I used this trick to make studentId read-only.
class GradeROForm(ModelForm):
studentId = forms.ModelChoiceField(queryset=Student.objects.all())
def __init__(self, *args, **kwargs):
super(GradeROForm,self).__init__(*args, **kwargs)
instance = getattr(self, 'instance', None)
if instance and instance.id:
self.fields['studentId'].widget.attrs['disabled']='disabled'
def clean_studentId(self):
instance = getattr(self,'instance',None)
if instance:
return instance.studentId
else:
return self.cleaned_data.get('studentId',None)
class Meta:
model=Grade
And here is my opinion:
def modifyGrade(request,student):
student = Student.objects.get(name=student)
mygrade = Grade.objects.get(studentId=student)
if request.method == "POST":
myform = GradeROForm(data=request.POST, instance=mygrade)
if myform.is_valid():
grade = myform.save()
info = "successfully updated %s" % grade.studentId
else:
myform=GradeROForm(instance=mygrade)
return render_to_response('grades/modifyGrade.html',locals())
, , "submit", , , . , , "", POST .
Django/Python, . , django. , - . ?