|
from django.core.validators import ValidationError
|
|
from django.utils.translation import ugettext_lazy as _
|
|
|
|
|
|
def validate_scale(value):
|
|
try:
|
|
int(eval(value))
|
|
except Exception as e:
|
|
raise ValidationError(
|
|
_("'%s' is not a valid scale expression. (%s)") % (value, e)
|
|
)
|