fix interface_selector bug
If a view using this selector defines an `accepts` attribute, the
view should be selectable only if the entity is of one of the
accepted types (+need to consider schema inheritance)
class Salesterm(EntityType):
described_by_test = SubjectRelation('File', cardinality='1*', composite='subject')
amount = Int(constraints=[IntervalBoundConstraint(0, 100)])
class tags(RelationDefinition):
subject = 'Tag'
object = ('BlogEntry', 'EUser')
class checked_by(RelationType):
subject = 'BlogEntry'
object = 'EUser'
cardinality = '?*'
permissions = {
'add': ('managers',),
'read': ('managers', 'users'),
'delete': ('managers',),
}