Den 08/01/2014 kl. 16.18 skrev Timothy W. Cook <[email protected]>: > I have several decimal fields defined in the model like this: > > min_inclusive = models.DecimalField(_('minimum inclusive'), max_digits=19, > decimal_places=10, help_text=_("Enter the minimum (inclusive) value for this > concept."), null=True, blank=True) > > Via the admin interface when I enter a 0 (zero) and save the object I get > 0E-10 as the value. I am using PostgreSQL 9.1 for persistence. > > So, why doesn't it just store a zero?
Underneath a DecimalField there is a Python float type, and some equivalent float type in your database. Float values are an approximation, so 0.000000000000 and 0 are not guaranteed to be equal. See http://stackoverflow.com/questions/2986150/python-floating-number > In reality I need to allow the range of, positive infinity to negative > infinity. But this doesn't seem possible. Is it? It’s not physically or computationally possible. How will you store an infinite number of digits on a hard drive of finite size? :-) Erik -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/4A347EEF-D57A-48A8-9E49-7F357546492B%40cederstrand.dk. For more options, visit https://groups.google.com/groups/opt_out.
