How to get correct difference between date range from two models.DateField fields?

Question

Django

Hello.
I am building a book rental website. There are two model fields: start_date and end_date (the user sets the lease range). It was necessary to receive list from days when the book will be occupied.
I did it in the form of a model method (wrapped in @property):

class Book(models.Model):
........

  @property
  def get_date(self):
    return [str(self.end - datetime.timedelta(i)) for i in range((self.end - self.start).days)]

When testing this code, I see that it lists the entire range but always misses one
day . '2016-05-14', '2016-05-13'] (i.e. misses the first day) Any response would be greatly appreciated

Answer 1

You get range(15-12) which will give you 3 results

return [str(self.end - datetime.timedelta(i)) for i in range((self.end - self.start).days+1)]