On Wed, Jan 8, 2014 at 1:44 PM, Erik Cederstrand <[email protected]>wrote:
> Den 08/01/2014 kl. 16.18 skrev Timothy W. Cook <[email protected]>: > > > > 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 > > But one would think that if Django calls it a decimal field, it would convert the float to decimal. I suppose I'll do that before writing it out to the file (an XML schema) so it really isn't a big deal, just surprising. BTW: it is stored in PostgreSQL as 0.0000000000 as a numeric. > > 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? :-) > Yeah, that was supposed to be sarcastic but it didn't come across well. :-) --Tim > > -- MLHIM VIP Signup: http://goo.gl/22B0U ============================================ Timothy Cook, MSc +55 21 94711995 MLHIM http://www.mlhim.org Like Us on FB: https://www.facebook.com/mlhim2 Circle us on G+: http://goo.gl/44EV5 Google Scholar: http://goo.gl/MMZ1o LinkedIn Profile:http://www.linkedin.com/in/timothywaynecook -- 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/CA%2B%3DOU3WGtzHnEf-CJ8hzXXsR2k9dSmz7OZUhc00kUFnA2jy6eQ%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
