Django - How to reach relational field - django

Question

I have Patient model which has many to many relation with ICF model. ICF model has many to one field to Unite model. In Unite model I have Unite names. I want to reach Unite names that are assigned to Patient with relations. I try to reach Unite names for each Patient. If it is more than one I cannot list them for that person. Here are my codes.
This is my patient model.
class Patient (models.Model):
id = models.AutoField(primary_key=True)
name = models.CharField(max_length=255)
lastname = models.CharField(max_length=255, default="doe")
data = models.JSONField()
Intensivecare_form = models.ManyToManyField(Intensivecare_Form)
isDeleted = models.BooleanField(default=False)
This is my ICF model.
class Intensivecare_Form (models.Model):
id = models.AutoField(primary_key=True)
hospitals_id = models.ForeignKey(Hospital, on_delete=models.CASCADE)
formname = models.CharField(max_length=128)
data = models.JSONField()
unites_id = models.ForeignKey(Unite, on_delete=models.CASCADE)
At last, This is my Unite model
class Unite (models.Model):
id = models.AutoField(primary_key=True)
unitename = models.CharField(max_length=128)
In my views.py file I have a function as below
def listPatients(request):
Patients = Patient.objects.all()
output = []
for patient in Patients:
unitename = []
icfinfo = serializers.serialize('json', patient.Intensivecare_form.all())
jsonicfinfo = json.loads(icfinfo)
unitename.append(jsonicfinfo)
output.append({'id': patient.id,
'fname': patient.name,
'lname': patient.lastname,
'data': patient.data,
'unitename': unitename,
})
return JsonResponse(output, safe=False)
This is what output looks like. I need to reach formname in unitename
0-> id, fname..., unitename-> 0 -> fields -> unitename

Answer 1

It seems your ICForm is only pointing at one Unite object.
Maybe try this to get all ICForm's in the query.
Instead of
unitename = []
icfinfo = serializers.serialize('json', patient.Intensivecare_form.all())
jsonicfinfo = json.loads(icfinfo)
unitename.append(jsonicfinfo)
Try renaming Intensivecare_form model rename unites_id to unites -- django knows to link on the id automatically and calling it unites_id could cause naming conflicts
Intensivecare_Form(models.Model):
unites = models.ForeignKey(Unites, on_delete=models.CASCADE)
And to get all unites names just get it in one query
unite_names = list(patient.Intensivecare_form.all().values_list('unites__unitename', flat=True))
That should do it for you! Best of luck!