Django returns a tuple instead of returning data
Question:
I have a simple model that is supposed to store some basic nutritional information about food, but whenever I create or edit the model it returns a tuple instead of the data. The app is simple and these are the only models I have in them.
Here is the model:
class User(AbstractUser):
test_field = models.CharField(max_length=100)
def __str__(self):
return self.username
class Food(models.Model):
name = models.CharField(max_length=100, null=False, blank=False),
calories = models.IntegerField(default=0, null=False),
protein = models.IntegerField(default=0),
fat = models.IntegerField(default=0),
rel_user = models.ForeignKey(User, on_delete=models.CASCADE, null=True)
At first I thought it was an issue with how I was saving the model, so I tried creating one through the shell with the following commands:
from api.models import User, Food
f = Food()
f.name = "Test"
f.calories = 1
f.rel_user = User.objects.get(id=1)
f.save()
If I call f.rel_user
, it returns [email protected]
, but if I call f.name
, it returns (<django.db.models.fields.CharField>,)
.
In order to try to fix this, I’ve looked through the getting started project on https://docs.djangoproject.com/en/4.2/intro/tutorial01/
, and have made sure that my settings.py, and my models are written like the ones on the site. I’ve tried using both the shell and a form to create test Food objects.
How can I fix this so when I try to get data from the food object it returns the actual value saved?
Answers:
class Food(models.Model):
name = models.CharField(max_length=100, null=False, blank=False),
calories = models.IntegerField(default=0, null=False),
protein = models.IntegerField(default=0),
fat = models.IntegerField(default=0),
You’re getting tuples because you put a comma after these fields.
Remove the commas.
rel_user
didn’t have a comma, so that field worked as expected.
I have a simple model that is supposed to store some basic nutritional information about food, but whenever I create or edit the model it returns a tuple instead of the data. The app is simple and these are the only models I have in them.
Here is the model:
class User(AbstractUser):
test_field = models.CharField(max_length=100)
def __str__(self):
return self.username
class Food(models.Model):
name = models.CharField(max_length=100, null=False, blank=False),
calories = models.IntegerField(default=0, null=False),
protein = models.IntegerField(default=0),
fat = models.IntegerField(default=0),
rel_user = models.ForeignKey(User, on_delete=models.CASCADE, null=True)
At first I thought it was an issue with how I was saving the model, so I tried creating one through the shell with the following commands:
from api.models import User, Food
f = Food()
f.name = "Test"
f.calories = 1
f.rel_user = User.objects.get(id=1)
f.save()
If I call f.rel_user
, it returns [email protected]
, but if I call f.name
, it returns (<django.db.models.fields.CharField>,)
.
In order to try to fix this, I’ve looked through the getting started project on https://docs.djangoproject.com/en/4.2/intro/tutorial01/
, and have made sure that my settings.py, and my models are written like the ones on the site. I’ve tried using both the shell and a form to create test Food objects.
How can I fix this so when I try to get data from the food object it returns the actual value saved?
class Food(models.Model):
name = models.CharField(max_length=100, null=False, blank=False),
calories = models.IntegerField(default=0, null=False),
protein = models.IntegerField(default=0),
fat = models.IntegerField(default=0),
You’re getting tuples because you put a comma after these fields.
Remove the commas.
rel_user
didn’t have a comma, so that field worked as expected.