Thank you for the quick reply.
> shouldn't this be as simple as "sample.container = container"
Yeah... I thought so too... And actually, the getter/setters (the
synonym or property) just do that... (and a check for the parameter
type):
class Sample(declarativeBase):
# yadda, yadda, yadda ...
def setContainer(self, container):
if isinstance(container, Container):
self._container = container
else:
raise TypeError("received a %s when expecting a
Container" % type(container))
Anyway... if my idea is not wrong, I'll check if the error is
somewhere else. It's good to know that I'm going in the right
direction!
Thank you!
2011/1/21 A.M. <age...@themactionfaction.com>:
>
> On Jan 21, 2011, at 12:29 PM, Hector Blanco wrote:
>
>> Hello list!
>>
>> I have a couple of classes. One of the behaves as the container of the other:
>>
>> class ContainerOfSamples(declarativeBase):
>> __tablename__ = "containers"
>>
>> _id = Column("id", Integer, primary_key=True)
>> _samples = relationship("Samples", cascade="all, delete",
>> collection_class=set)
>>
>> def setSamples(self, samples):
>> self._samples = samples
>>
>> def getSamples(self):
>> return self._samples
>>
>> def addSample(self, sample):
>> self._samples.add(sample)
>>
>> id = sqlalchemy.orm.synonym('_id', descriptor=property(getId, setId))
>> samples = sqlalchemy.orm.synonym('_samples',
>> descriptor=property(getSamples,
>> setSamples))
>>
>>
>> class Sample(declarativeBase):
>> __tablename__ = "containers"
>>
>> _id = Column("id", Integer, primary_key=True)
>> _whatever = Column("whatever", String(20))
>> _containerId = Column("container_id", Integer,
>> ForeignKey("containers.id"))
>> _container = relationship("Container", uselist=False)
>>
>> def __hash__(self):
>> return int(self.id)
>>
>> def setContainer(self, container):
>> self._container = container
>>
>> def getContainer(self):
>> return self._container
>>
>> id = sqlalchemy.orm.synonym('_id', descriptor=property(getId, setId))
>> whatever = sqlalchemy.orm.synonym('_whatever',
>> descriptor=property(getWhatever,
>> setWhatever))
>> container = sqlalchemy.orm.synonym('_container',
>> descriptor=property(getContainer,
>> setContainer))
>>
>>
>> sample = Sample()
>> container = ContainerOfSamples()
>> sample.container(container)
>
> I don't understand the need for the synonyms, but shouldn't this be as simple
> as "sample.container = container"? The relationship on sample is already
> defined... maybe you are confused because you think you need these getters
> and setters- in the above example, I don't see any need for them.
>
> Cheers,
> M
>
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