Hi everyone,

I have to do a Queryset where i calculate the delta between a **DateField()** and the date of today. So far, i’ve managed to calculate this delta, with two **DateField()** of the same model.But when i want to calculate it with the date of today(i tried **date.today()**, **datetime.now().date()** and both of them, gave me 0 as a result).

Here is my model

```
class Marche(models.Model):
titre = models.CharField(max_length=200)
date_entree = models.DateField(auto_now_add=True)
date_1 = models.DateField(null=True, blank=True)
date_2 = models.DateField(null=True, blank=True)
def __str__(self):
return self.titre
```

Here is the queryset and the output i get when i Calculate the difference between two dates ,that are in my model.(It’s to show you what works). The dates in this exemple are not accurate, it’s just for the test.

```
from django.db.models import F, ExpressionWrapper, fields
from task3.models import Marche
from django.utils.timezone import timedelta
import datetime
duree = ExpressionWrapper(F('date_2') - F('date_1') , output_field=fields.DurationField())
marche_duration = Marche.objects.annotate(duration=duree)
marche_duration.filter(duration__gt=timedelta(days=2)).values('date_1','date_2','duration')
# Output
<QuerySet [
{'date_1': datetime.date(2021, 4, 22),
'date_livraison': datetime.date(2021, 4, 9),
'duration': datetime.timedelta(13)},
{'date_1': datetime.date(2021, 4, 22),
'date_livraison': datetime.date(2021, 4, 6),
'duration': datetime.timedelta(16)}]>
```

The goal is to be able to filter entries who have a delta superior to a certain integer.

The issue i’m facing is that when i change **date_2** in the ExpressionWrapper, the delta is always equal to 0.

So i hope you can explain to me how to do the same calculation, bust instead of **date_2**. use the date of today. If you have any questions , i’m okay for it

Thanks in advance