how to use delete() query in django? - django

Question

I am trying to delete one of the items of a field in the table.
For example, I want to remove the 'hadi', shown in the image, from the table.
I make query to filter and exclude instance but in final part, delete() query does not accept input such as id or variable to remove specific thing in one field.
image
models.py
class Expense(models.Model):
expenser = models.ForeignKey(
settings.AUTH_USER_MODEL,
on_delete=models.CASCADE,
)
debtors = models.ManyToManyField(
CustomUser,
related_name='debtors',
)
amount = models.PositiveIntegerField()
text = models.TextField()
date = models.DateField(null=True)
time = models.TimeField(null=True)
def get_debtors(self):
return ", ".join([str(d) for d in self.debtors.all()])
def who_has_no_paid(self):
return ", ".join([str(d) for d in self.debtors.all() if str(d) != str(self.expenser)])
def debt(self):
return int(float(self.amount/self.debtors.all().count()))
def get_absolute_url(self):
return reverse('expense_detail', args=[self.id])
Now what is the query that should be used in view?

Answer 1

Since it is a many to many field you need to use expense_obj.debtors.remove(hadi_obj) rather than using delete().
Documentation is really good for referencing
your view could be :
def remove_hadi(request):
expense_obj = Expense.objects.get(id=some_id) #get the expense obj from where u want to remove hadi
hadi_obj = User.objects.get(name="hadi") # get user obj u want to remove eg: hadi
# use m2m query
expense_obj.debtors.remove(hadi_obj)
return response