[hooks] fix timestamp confusion in TransactionsCleanupStartupHook
transactions.tx_time is inserted as datetime.utcnow(), in
server/sources/native.py:NativeSQLSource.start_undoable_transaction.
Don't compare it to datetime.now().
from yams.buildobjs import ComputedRelation, EntityType, RelationDefinition
from cubicweb.schema import RRQLExpression
class Subject(EntityType):
pass
class Object(EntityType):
pass
class relation(RelationDefinition):
subject = 'Subject'
object = 'Object'
class computed(ComputedRelation):
rule = 'S relation O'
__permissions__ = {'read': (RRQLExpression('S is ET'),)}