The Plone Expanse

A bit of Plone, Zope and a dash of everything else

@2019 Tiberiu Ichim

Short recipe for adaptation with Five

zope3, cookbook, Plone

Wed, Sep 20, 2006, 200 Words 
>>> from zope.interface import Interface, Attribute, implements

Let's say we have an object type "Person". This person can introduce himself with the name.

class IPerson(Interface):
    name = Attribute('Name of the person')
    def say_name():
        """The name of the person"""

class Person(object):
    implements(IPerson)

    def __init__(self, name):
       self.name = name

    def say_name():
        return 'My name is ' + self.name

Next, we have another object type, let's say "Worker", with an interface of IWorker.

class IWorker(Interface):
    job = Attribute('Name of the job')
    def set_job():
        """sets the job"""

    def say_job():
        """the job"""

Now we want to adapt the Person so that a person is also a Worker.

class PersonJob(object):
    implements(IWorker)

    def __init__(self, context):
        self.context = context

    def set_job(self, job):
        self.job = job

    def say_job(self):
        return "My name is %s and I work at %s" % (self.context.name, self.job)

Now let's register the factory that implements the Worker for a Person.

#### >>> registry.register(IPerson, [IWorker,], '', PersonJob)

<configure xmlns="http://namespaces.zope.org/zope">
<adapter
    for=".IPerson"
    provides=".IWorker"
    factory=".PersonJob" />
</configure>

Now let's see how this works

>>> Tom = Person('Tom Sawyer')
>>> print Tom.say_name()
'My name is Tom Sawyer'
>>> tomjob = IWorker(Tom)
>>> tomjob.set_job('DisneyLand')
>>> tomjob.say_job()
'My name is Tom Sawyer and I work at DisneyLand'

Further reference:

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