def _default_from_schema(context, schema, fieldname):
"""helper to lookup default value of a field
"""
if schema is None:
return _marker
field = schema.get(fieldname, None)
if field is None:
return _marker
if IContextAwareDefaultFactory.providedBy(
getattr(field, 'defaultFactory', None)):
bound = field.bind(context)
return deepcopy(bound.default)
else:
return deepcopy(field.default)
return _marker
def _default_from_schema(context, schema, fieldname):
"""helper to lookup default value of a field
"""
if schema is None:
return _marker
field = schema.get(fieldname, None)
if field is None:
return _marker
df = getattr(field, 'defaultFactory', None)
if df is not None:
if IContextAwareDefaultFactory.providedBy(df):
return deepcopy(field.defaultFactory(context))
else:
return deepcopy(field.defaultFactory())
else:
return deepcopy(field.default)
return _marker
def get_default_from_schema(context, schema, fieldname, default=None):
"""helper to lookup default value of a field
"""
if schema is None:
return default
field = schema.get(fieldname, None)
if field is None:
return default
df = getattr(field, "defaultFactory", None)
if df is not None:
if IContextAwareDefaultFactory.providedBy(df):
return deepcopy(field.defaultFactory(context))
else:
return deepcopy(field.defaultFactory())
if field.default is not None:
return deepcopy(field.default)
if field.default != default:
return field.default
return default