Question

Is there any way filter via foreignObject

see my code, which I want to fix.

model Part :

class UserProfile:
    blahblah

class FreeTime : 
    owner = models.ForeignKey(UserProfile)
    fromTime=models.DateField()
    toTime=models.DateField()

Now, coding part

givenTime = date(2012,11,11)


freeTimes = FreeTime.objects.filter(fromTime__lte=givenTime, toTime__gte=givenTime)

users = []
for freeTime in freeTimes:
    users.append(freeTime.owner)

//todo : remove duplicated object of user

This is totally waste of code.

As you see, what I want to is, find user who is free at given time.

Any way to reduce the code?

Answer 1

I think this should work:

User.objects.filter(freetime__fromTime__lte=givenTime, freetime__toTime__gte=givenTime)

EDIT:

As @calvin Cheng says, you should FK to User:

from django.contrib.auth.models import User


class FreeTime(models.Model): 
    owner = models.ForeignKey(User)
    fromTime=models.DateField()
    toTime=models.DateField()