from wtforms import Form, TextField, validators
from utils import Unique
from models import Group

class CreateGroup(Form):
    name = TextField('group name', [
        validators.Required(),
        validators.Regexp('^[a-zA-Z-1-9_-]+$',
            message=u'Invalid group name (only simple characters, numbers, - and _).'),
        Unique(Group, Group.name,
            message=u'A group with this name already exists.')])