Introduction

This package allows you to use plone.app.relations based relations in an Archetypes field. It exposes the same API as standard AT references do, making it a simple drop-in replacement.

Test

Prime tests, and set up our components and some basic content

>>> from plonerelations.ATField import tests
>>> tests.base_setup(portal)
>>> ob1 = portal['ob1']
>>> ob2 = portal['ob2']
>>> ob3 = portal['ob3']
>>> ob4 = portal['ob4']
>>> ob5 = portal['ob5']

Import fields, create instance of it, make it multi valued

>>> from plonerelations.ATField.ploneRelationsATField import PloneRelationsATField
>>> multiValueATField = PloneRelationsATField ()
>>> multiValueATField.multiValued = True
>>> multiValueATField.relationship = 'test multi valued relationship'

Make a single value one, for good measure

>>> singleValueATField = PloneRelationsATField ()
>>> singleValueATField.multiValued = False
>>> singleValueATField.relationship = 'test single relationship'

Create an Interface

>>> from zope.interface import Interface
>>> class IMyInterface (Interface):
...     pass

set relationship_interface on ATFields

>>> multiValueATField.relationship_interface = IMyInterface
>>> singleValueATField.relationship_interface = IMyInterface

make multi relationship from ob1 to objs 2 and 3, and a single relathionship from ob4 to ob5

>>> singleValueATField.set ( ob4, ob5 )
>>> multiValueATField.set ( ob1, [ob2,ob3] )

test if get method returns right objects. Multi returns a list

>>> list (multiValueATField.get( ob1 ))
[<Demo ob2>, <Demo ob3>]

>>> list (multiValueATField.getRaw( ob1, aslist=False))
['ob2', 'ob3']
>>> list (multiValueATField.getRaw( ob1, aslist=True ))
['ob2', 'ob3']

sinlge returns an object

>>> singleValueATField.get ( ob4 )
<Demo ob5>

>>> singleValueATField.getRaw( ob4, aslist=False )
'ob5'

>>> singleValueATField.getRaw( ob4, aslist=True )
['ob5']

double check if plone.app.interface returns the same

>>> from plone.app.relations import interfaces
>>> multiValueSource = interfaces.IRelationshipSource(ob1)
>>> singleValueSource = interfaces.IRelationshipSource(ob4)
>>> multiValueRelationships = list(multiValueSource.getRelationships())
>>> singleValueRelationship = list(singleValueSource.getRelationships())
>>> multiValueRelationships
[<Relationship 'test multi valued relationship' from (<Demo ob1>,) to (<Demo ob2>,)>, <Relationship 'test multi valued relationship' from (<Demo ob1>,) to (<Demo ob3>,)>]
>>> singleValueRelationship
[<Relationship 'test single relationship' from (<Demo ob4>,) to (<Demo ob5>,)>]

check if relathionshiops provide Interfaces

>>> IMyInterface.providedBy (singleValueRelationship[0])
True
>>> IMyInterface.providedBy (multiValueRelationships[0])
True

check if it deletes

>>> multiValueATField.set ( ob1, [ob2,ob5] )
>>> list(multiValueSource.getRelationships())
[<Relationship 'test multi valued relationship' from (<Demo ob1>,) to (<Demo ob2>,)>, <Relationship 'test multi valued relationship' from (<Demo ob1>,) to (<Demo ob5>,)>]
>>> singleValueATField.set ( ob4, ob1 )
>>> singleValueRelationship = list(singleValueSource.getRelationships())
>>> singleValueRelationship
[<Relationship 'test single relationship' from (<Demo ob4>,) to (<Demo ob1>,)>]

Changelog