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loops - Linked Objects for Organization and Processing Services
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($Id$)
>>> from zope import component
>>> from zope.traversing.api import getName
>>> from loops.common import adapted
>>> from loops.concept import Concept
>>> from loops.setup import addAndConfigureObject
Let's set up a loops site with basic and example concepts and resources.
>>> from zope.app.testing.setup import placefulSetUp, placefulTearDown
>>> site = placefulSetUp(True)
>>> from loops.constraint.testsetup import TestSite
>>> t = TestSite(site)
>>> concepts, resources, views = t.setup()
>>> tType = concepts.getTypeConcept()
Constraints - Restrict Predicates and Types for Concept and Resource Assignments
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We create a person type and an institution type and a corresponding
predicate.
>>> tPerson = addAndConfigureObject(concepts, Concept, 'person',
... title='Person', conceptType=tType)
>>> tInstitution = addAndConfigureObject(concepts, Concept, 'institution',
... title='Institution', conceptType=tType)
>>> tPredicate = concepts.getPredicateType()
>>> isEmployedBy = addAndConfigureObject(concepts, Concept, 'isemployedby',
... title='is Employed by', conceptType=tPredicate)
The static constraint concept type has already been created during setup.
We create a simple constraint that
>>> tStaticConstraint = concepts['staticconstraint']
>>> cstr01 = addAndConfigureObject(concepts, Concept, 'cstr01',
... title='Demo Constraint', conceptType=tStaticConstraint)
>>> aCstr01 = adapted(cstr01)
>>> aCstr01.predicates = [isEmployedBy]
>>> aCstr01.types = [tInstitution]
We can now use this constraint to control the parent concepts a person
may be assigned to.
>>> from loops.constraint.base import hasConstraint
>>> tPerson.assignParent(cstr01, hasConstraint)
