Django: Not fetching the same object - django

Question

I have a form where i am entering four details 'Persona Name', 'Persona Key' ,'Persona Key Label' and 'Persona Key Value' and on entering these values i am pressing Submit button which generates a GET request on my server.
Following are django views:-
def PersonaSave(request):
persona_name = request.GET.get('persona_name',)
persona_key = request.GET.get('key_name',)
persona_key_value = request.GET.get('key_value',)
persona_key_label = request.GET.get('key_label',)
persona_submit = request.GET.get('Save',)
return( persona_name , persona_key , persona_key_label , persona_key_value , persona_submit )
def TestPageView(request):
x=PersonaSave(request)
persona_name = x[0]
persona_key = x[1]
persona_key_label=x[2]
persona_key_value=x[3]
persona_submit=x[4]
if(persona_name is None and persona_key is None and persona_key_label is None and persona_key_value is None):
return render(request, 'dashboard/test_page.html')
elif TestPersonaName.objects.filter(name=persona_name).exists():
t= TestPersonaName.objects.get(pk=persona_name)
testpersona = TestPersona.objects.get(name=t)
if testpersona.key == persona_key:
testpersona.label= persona_key_label
testpersona.value = persona_key_value
t=TestPersonaName(name=persona_name)
t.save()
testpersona = TestPersona(name=t,key=persona_key,label=persona_key_label,value=persona_key_value)
testpersona.save()
return render(request,'dashboard/test_page.html')
I am rewriting codes of lines where updation and new persona formation starts to maintain the clarity of question.
Update Function starts from here-----
elif TestPersonaName.objects.filter(name=persona_name).exists():
t= TestPersonaName.objects.get(pk=persona_name)
testpersona = TestPersona.objects.get(name=t)
if testpersona.key == persona_key:
testpersona.label= persona_key_label
testpersona.value = persona_key_value
-----This is where update function ends
If persona name is different then complete new TestPersonaName object and TestPersona object will be formed.
For this the function starts here----
t=TestPersonaName(name=persona_name)
t.save()
testpersona = TestPersona(name=t,key=persona_key,label=persona_key_label,value=persona_key_value)
testpersona.save()
----and ends here.
Now the problem is for the same persona name and same persona key two different TestPersona objects are being formed. For e.g If I enter persona_name = Ankit,
key = 'city' and value = 'New Delhi' and later i want to change city so i enter
name='Ankit' , key = 'city' and name = 'Lucknow'. On pressing submit two different TestPersona objects are being formed. i.e
object1(name='Ankit',key='city', value='New Delhi') and
object2(name='Ankit',key='city',value='Lucknow')
Ideally it should be:-
object1(name='Ankit', key='city', value='Lucknow')
Following are TestPersonaName and TestPersona models:-
class TestPersonaName(models.Model):
name = models.CharField(max_length=100,primary_key=True)
class TestPersona(models.Model):
name = models.ForeignKey('TestPersonaName',on_delete=models.CASCADE)
key = models.CharField(max_length=200)
label = models.CharField(max_length=200,null=True,blank=True)
value = models.CharField(max_length=200)

Answer 1

elif TestPersonaName.objects.filter(name=persona_name).exists():
t= TestPersonaName.objects.get(pk=persona_name)
testpersona = TestPersona.objects.get(name=t)
if testpersona.key == persona_key:
testpersona.label= persona_key_label
testpersona.value = persona_key_value
You need too save the persona and return here as in the if above. Otherwise the interpreter exits this block and continues with
t=TestPersonaName(name=persona_name)
t.save()
testpersona = TestPersona(name=t,key=persona_key,label=persona_key_label,value=persona_key_value)
testpersona.save()
which replaces the value of t with a new persona that gets saved to DB. After every attempt to edit you'll keep ending up with a new record.