dynamic forms on deform

formtest.py

from colander import MappingSchema, SchemaNode, String
from deform import Form


def magnet(schema):
    def decorator(node):
        for child in node().children:
            schema.add(child)
        return node
    return decorator


class CommentSchema(MappingSchema):
    """ dynamically constructed schema """


schema = CommentSchema()
schema_magnet = magnet(schema)


# in this package...
@schema_magnet
class Comment(MappingSchema):

    username = SchemaNode(String(), title='First name')
    fullname = SchemaNode(String(), title='Last name')
    email = SchemaNode(String())
    title = SchemaNode(String())
    text = SchemaNode(String())


# in some other package...
@schema_magnet
class Captcha(MappingSchema):
    captcha = SchemaNode(String())


# again in this package...
form = Form(schema, button=['send'])
print form.render()