SubstanceD: demonstrate bug in 'config.add_propertysheet'

resources.py

import colander
from substanced.content import content
from substanced.file import File as BaseFile
from substanced.file import FilePropertiesSchema
from substanced.property import PropertySheet
from substanced.schema import NameSchemaNode

class EditingType(object):

    def __init__(self, typename):
        self._typename = typename

    def __call__(self, context, request):
        return request.registry.content.istype(context, self._typename)

class BillSchema(FilePropertiesSchema):
    name = NameSchemaNode(
        editing=EditingType('Bill'),
        )
    posted_date = colander.SchemaNode(
        colander.Date(),
        missing=None,
        default=None,
        )
    due_date = colander.SchemaNode(
        colander.Date(),
        missing=None,
        default=None,
        )
    paid_date = colander.SchemaNode(
        colander.Date(),
        missing=None,
        default=None,
        )

class BillPropertySheet(PropertySheet):
    schema = BillSchema()

@content(
    'Bill',
    icon='glyphicon glyphicon-file',
    add_view='add_bill',
    )
class Bill(BaseFile):
    pass

class ContractSchema(FilePropertiesSchema):
    name = NameSchemaNode(
        editing=EditingType('Contract'),
        )
    status = colander.SchemaNode(
        colander.String(),
        default='DRAFT',
        widget=deform.widget.RadioChoiceWidget(
            values=(
                ('DRAFT', 'Draft'),
                ('SIGNED', 'Final'),
                ('EXPIRED', 'Expired'),
                )
            )
        )
    signed_date = colander.SchemaNode(
        colander.Date(),
        missing=None,
        default=None,
        )


class ContractPropertySheet(PropertySheet):
    schema = ContractSchema()

@content(
    'Contract',
    icon='glyphicon glyphicon-file',
    add_view='add_contract',
    )
class Contract(BaseFile):
    pass

class InvoiceSchema(FilePropertiesSchema):
    name = NameSchemaNode(
        editing=EditingType('Invoice'),
        )
    posted_date = colander.SchemaNode(
        colander.Date(),
        missing=None,
        default=None,
        )
    paid_date = colander.SchemaNode(
        colander.Date(),
        missing=None,
        default=None,
        )

class InvoicePropertySheet(PropertySheet):
    schema = InvoiceSchema()

@content(
    'Invoice',
    icon='glyphicon glyphicon-file',
    add_view='add_invoice',
    )
class Invoice(BaseFile):
    pass


def includeme(config): # pragma: no cover
    config.add_propertysheet('Basic', BillPropertySheet, Bill)
    config.add_propertysheet('Basic', ContractPropertySheet, Contract)
    config.add_propertysheet('Basic', InvoicePropertySheet, Invoice)