How can I have only positive decimal numbers in Django using Python

Question

Hi all, pretty simple question but I seem to be stuck.

Let us say I have created a few models in Django and I ended up creating a decimal field that looks something like this. Check it out:

price = models.DecimalField(_(u'Price'), decimal_places=2, max_digits=12)

We already know that price cannot be negative or in fact, it cannot be zero either. So, my question is simple. Is there any way which I can make use of to limit the number to make sure it is only positive?

Is it that or would I have to consider making use of form validation to obtain this?

All help appreciated!

Answer 1

Hi, are you aware of something called as the MinValueValidator? 

Consider the following example:

price = models.DecimalField(_(u'Price'), decimal_places=2, max_digits=12, validators=[MinValueValidator(Decimal('0.01'))])

You could go about using that or you could just add min_value=Decimal('0.01')

Either way, your purpose should be solved using this. Cheers!