Django Object Names , can't compare values - django

Question

the problem about 2 things ; First of all in admin panel and webpage foreign keys are shown as object(1) ,Yes I know the solution of this we use str stuff but when I try to compare id of them it takes the value of str function result let me show in code;
Im checking logged in user's connected company id that equals to only students who are connected with same company
model.py - Student
class Student(models.Model):
id = models.AutoField(primary_key=True, verbose_name='StudentID')
parentid = models.ForeignKey(Parent, on_delete=models.CASCADE, verbose_name='ParentID')
companyid = models.ForeignKey(Company, on_delete=models.CASCADE, verbose_name='CompanyID')
classid = models.ForeignKey(Classes, on_delete=models.CASCADE, verbose_name='ClassID')
gender = models.CharField(max_length=1, default='N', verbose_name='Gender')
name = models.CharField(max_length=30, verbose_name='Name')
surname = models.CharField(max_length=30, verbose_name='Surname')
dob = models.DateTimeField(verbose_name='Doğum Yılı')
bloodtype = models.ForeignKey(BloodType, on_delete=models.CASCADE, verbose_name='Blood Type')
status = models.BooleanField(verbose_name='State')
list_display = ('id', 'parentid', 'companyid', 'classid', 'gender', 'name', 'surname', 'dob', 'bloodtype', 'status')
def __str__(self):
return "%s %s - %s" % (self.name, self.surname, self.gender)
model.py - Company
class Company(models.Model):
id = models.AutoField(primary_key=True, verbose_name='CompanyID')
name = models.CharField(
max_length=100, verbose_name='Company Name')
contactname = models.CharField(max_length=30)
contactsurname = models.CharField(
max_length=30)
address = models.CharField(max_length=200)
city = models.CharField(max_length=20)
phone = models.CharField(max_length=12)
weburl = models.URLField(max_length=80)
email = models.CharField(max_length=80)
studentcapacity = models.BigIntegerField(verbose_name='Student Capacity')
classcapacity = models.BigIntegerField(verbose_name='Class Capacity')
notes = models.TextField(max_length=200)
status = models.BooleanField(verbose_name='State')
list_display = ('id', 'name', 'contactname', 'contactsurname', 'address', 'city', 'phone',
'weburl', 'email', 'studentcapacity', 'classcapacity', 'notes', 'status')
def __str__(self):
return "%s - %s" % (self.id, self.name)
views.py
#login_required()
def student_update(request, pk):
student = get_object_or_404(Student, pk=pk)
usercompanyid = UserProfile.objects.filter(userid=request.user.id).only('companyid')
print('before control')
a = usercompanyid.values_list('companyid', flat=True)[0]
print(a)
print(student.companyid)
if student.companyid == a:
print('passed if')
if request.method == 'POST':
form = StudentForm(request.POST, instance=student)
else:
form = StudentForm(instance=student)
return save_student_form(request, form, 'student_update_partial.html')
else:
return view_404(request)
at if state " student.companyid == a: " = Company ID - Company Name , output: 1 -Test CompanyName = 1 , I need it to return only field I call which is companyid, I know it is allias to "companyID - companyName". Is it possible to fix this with another way , I'm not pro of django python , just trying to do some project for learning if it's a dump question sorry for all :)

Answer 1

When you do this:
companyid = models.ForeignKey(...)
The database schema would actually have a field name of companyid_id.
So in your case, if you want to compare object IDs then you actually need to do this:
if student.companyid_id == a:
To avoid confusion, I would advise you not to append the 'id' part to your Django model field names.

Answer 2

There's a lot of unnecessary messing around with only and values here. No need for any of that. Just compare the objects directly:
def student_update(request, pk):
student = get_object_or_404(Student, pk=pk)
if student.companyid == request.userprofile.companyid:
...
As an aside, you shouldn't call your foreign keys "companyid", "parentid" etc; they're not IDs, they're objects. Call them "company", "parent" etc.