Error while select_related query - django

Question

I have Question and QuestionChoices models as below, when I try to retrieve the Question and related Answers from the Questionchoices I get the below error saying that the query is expecting string. What could be wrong model/query?
class Question(models.Model):
Question_Id = models.AutoField(primary_key=True)
Question_Text = models.TextField(max_length=1000)
def __str__(self):
return self.Question_Text
def __int__(self):
return self.Question_Id
class QuestionChoices(models.Model):
Choice_Id = models.AutoField(primary_key=True)
Question_Choices_Question_Id = models.ForeignKey("Question", on_delete=models.CASCADE)
Choice = models.TextField(max_length=500)
Is_Right_Choice = models.BooleanField(default=False)
>>> QuestionChoices.objects.select_related().filter(Question_Choices_Question_Id = Question.Question_Id)
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "C:\Users\adm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\models\query.py", line 836, in filter
return self._filter_or_exclude(False, *args, **kwargs)
File "C:\Users\adm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\models\query.py", line 854, in _filter_or_exclude
clone.query.add_q(Q(*args, **kwargs))
File "C:\Users\adm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\models\sql\query.py", line 1253, in add_q
clause, _ = self._add_q(q_object, self.used_aliases)
File "C:\Users\adm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\models\sql\query.py", line 1277, in _add_q
split_subq=split_subq,
File "C:\Users\adm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\models\sql\query.py", line 1215, in build_filter
condition = self.build_lookup(lookups, col, value)
File "C:\Users\adm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\models\sql\query.py", line 1085, in build_lookup
lookup = lookup_class(lhs, rhs)
File "C:\Users\adm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\models\lookups.py", line 18, in __init__
self.rhs = self.get_prep_lookup()
File "C:\Users\adm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\models\fields\related_lookups.py", line 115, in get_prep_lookup
self.rhs = target_field.get_prep_value(self.rhs)
File "C:\Users\adm\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\models\fields\__init__.py", line 947, in get_prep_value
return int(value)
TypeError: int() argument must be a string, a bytes-like object or a number, not 'DeferredAttribute'

Answer 1

I got the same error after running your shell command. The problem is caused by the way the code's filter() is set-up. The argument requires a model object OR foreign key as the value.
Answer:
python3 manage.py shell
>>> from my_app.models import *
>>> my_question_obj = Question.objects.create(Question_Text = "This is my question")
>>> QuestionChoices.objects.select_related().filter(Question_Choices_Question_Id=my_model_obj)
Alternatively if you already have a question you would like to filter on in your database you can use get() to retrieve the object.
python3 manage.py shell
>>> from my_app.models import *
>>> my_question_obj = Question.objects.get(Question_Text="This is the text of your question")
>>> QuestionChoices.objects.select_related().filter(Question_Choices_Question_Id = my_model_obj)