好的,我已经做到了:
def purchase_form(quantity=1):
class QuantityForm(forms.Form):
forms.IntegerField(label="Purchase quantity",min_value=1,max_value=quantity,required=True,widget=forms.Select(choices= [ (i,i) for i in range(1,quantity+1) ]) )
return QuantityForm
purchase_form(10) 的输出:
>>>print d
<tr><th>Purchase quantity:</th><td><select name="x">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</option>
<option value="10">10</option>
</select></td></tr>
还验证:
>>> d.clean(5)
5
>>> d.clean(11)
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/usr/local/lib/python2.6/dist-packages/django/forms/fields.py", line 187, in clean
raise ValidationError(self.error_messages['max_value'] % self.max_value)
ValidationError: [u'Ensure this value is less than or equal to 10.']