Assign a model to another model using ModelChoiceField - django

Question

I am new to Django and would like to create a platform where teachers can create student profiles and assign reports to the specific student.
Therefore, I have made two models (Student & Report) and two CreateViews. When creating a report, the teacher has the option to select a student from a choice field. This I have done using ModelChoiceField. However, when submitting the report model, the students name is not saved to that model. How can I accomplish this?
Ultimately I would like to have a profile to each student showing their info and reports attached to their model.
models.py
class Student(models.Model):
author = models.ForeignKey(User, null=True, on_delete=models.CASCADE)
name = models.CharField(max_length=30, default="")
age = models.CharField(max_length=2, default="", blank=True)
class Report(models.Model):
date_posted = models.DateTimeField(default=timezone.now)
author = models.ForeignKey(User, null=True, on_delete=models.CASCADE)
title = models.CharField(max_length=30)
forms.py
class StudentForm(forms.ModelForm):
def __init__(self, *args, **kwargs):
super(StudentForm, self).__init__(*args, **kwargs)
class Meta:
model = Student
fields = ['name','age',]
class ReportForm(forms.ModelForm):
student = forms.ModelChoiceField(queryset=Student.name, initial=0)
class Meta:
model = Report
fields = ['title','file','player',]
views.py
class StudentCreate(LoginRequiredMixin, CreateView):
model = Student
template_name = 'student_create.html'
form_class = forms.StudentForm
def form_valid(self, form):
form.instance.author = self.request.user
return super().form_valid(form)
class ReportCreate(LoginRequiredMixin, CreateView):
model = Report
template_name = 'report_create.html'
form_class = forms.ReportForm
def form_valid(self, form):
form.instance.author = self.request.user
return super().form_valid(form)

Answer 1

Currently your Report model is like so:
class Report(models.Model):
date_posted = models.DateTimeField(default=timezone.now)
author = models.ForeignKey(User, null=True, on_delete=models.CASCADE)
title = models.CharField(max_length=30)
The basic concept behind a model is that it is an abstraction / design of how we want the database table for some entity to look like. So the fields we add in a model are columns / attributes in our database table. If we want to store some data we need to have some column for it (or in terms of models a field).
Your model Report has no field for storing some student (in essence a foreign key to a Student, a foreign key is basically a pointer to a particular entry of another table). So you should add that to your model:
class Report(models.Model):
date_posted = models.DateTimeField(default=timezone.now)
author = models.ForeignKey(User, null=True, on_delete=models.CASCADE)
title = models.CharField(max_length=30)
student = models.ForeignKey(Student, on_delete=models.CASCADE, related_name="reports")