Hi,
Yes, that's what I was hoping. Are you getting an error message, or what
happens when you try?
Collin
On Tuesday, November 18, 2014 1:16:00 PM UTC-5, Shaun Livingston wrote:
>
> Yeah, I was on the #django IRC yesterday and they were saying something
> similiar, that I should switch it to a ManyToManyField. I did so, and also
> tried making it a ForeignKey, but both without success. As far as trying
> your thought specifically, I changed GenericRelation to ForeignKey and
> tried it with and without related_name, both without any change in the
> result. Is this what you intended that I try?
>
>
> On Monday, November 17, 2014 10:50:09 AM UTC-7, Shaun Livingston wrote:
>>
>> Hi,
>> I have two different apps that contain classes of the same name, and
>> using a related name in a GenericRelation doesn't seem to be helping. Here
>> are the details:
>>
>> In both of the apps I have "Source" and "Variable." They're not the same
>> for either app, so I can't just create one. These apps are called "hs_core"
>> and "ref_ts." In both apps I have a class called
>> "<app_name(CamelCase)>Metadata" that has a GenericRelation to both of the
>> Source and Variable classes. So I added a related_name in order to
>> differentiate between the two in the database. It didn't seem to have any
>> effect at all. Here are some snippets of the code (I can add more if you
>> need):
>>
>> In ref_ts:
>> class Source(AbstractMetaDataElement):
>> term = 'Source'
>> derived_from = models.CharField(max_length=300)
>> organization = models.CharField(max_length=200, null=True)
>> source_description = models.CharField(max_length=400, null=True)
>>
>> def __unicode__(self):
>> return self.derived_from
>>
>> @classmethod
>> def create(cls, **kwargs):
>> if 'derived_from' in kwargs:
>> # check the source doesn't already exists - source needs to
>> be unique per resource
>> if 'metadata_obj' in kwargs:
>> metadata_obj = kwargs['metadata_obj']
>> metadata_type =
>> ContentType.objects.get_for_model(metadata_obj)
>> src = Source.objects.filter(derived_from=
>> kwargs['derived_from'], object_id=metadata_obj.id,
>> content_type=metadata_type).first()
>> if src:
>> raise ValidationError('Source:%s already exists for
>> this resource.' % kwargs['derived_from'])
>> src =
>> Source.objects.create(derived_from=kwargs['derived_from'],
>> organization=kwargs.get('organization'),source_description=kwargs.get('source_description'),
>>
>> content_object=metadata_obj)
>> return src
>> else:
>> raise ValidationError('Metadata instance for which source
>> element to be created is missing.')
>> else:
>> raise ValidationError("Source data is missing.")
>>
>> @classmethod
>> def update(cls, element_id, **kwargs):
>> src = Source.objects.get(id=element_id)
>> if src:
>> if 'derived_from' in kwargs:
>> src.derived_from = kwargs['derived_from']
>> if 'organization' in kwargs:
>> src.organization = kwargs['organization']
>> if 'source_description' in kwargs:
>> src.source_description = kwargs['source_description']
>> src.save()
>> else:
>> raise ObjectDoesNotExist("No source element was found for the
>> provided id:%s" % element_id)
>>
>> @classmethod
>> def remove(cls, element_id):
>> src = Source.objects.get(id=element_id)
>> if src:
>> src.delete()
>> else:
>> raise ObjectDoesNotExist("No source element was found for
>> id:%d." % element_id)
>>
>> class RefTSMetadata(CoreMetaData):
>> ...
>> variables = generic.GenericRelation(Ref_TS_Variable,
>> related_name='ref_ts_variables')
>> sources = generic.GenericRelation(Ref_TS_Source,
>> related_name='ref_ts_sources')
>> ...
>>
>> @classmethod
>> def get_supported_element_names(cls):
>> # get the names of all core metadata elements
>> elements = super(RefTSMetadata, cls).get_supported_element_names()
>> # add the name of any additional element to the list
>> elements.append('Method')
>> elements.append('QualityControlLevel')
>> elements.append('Variable')
>> elements.append('Site')
>> return elements
>>
>> @property
>> def resource(self):
>> return self._refts_resource.all().first()
>>
>> def get_xml(self):
>> ...
>>
>>
--
You received this message because you are subscribed to the Google Groups
"Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to django-users+unsubscr...@googlegroups.com.
To post to this group, send email to django-users@googlegroups.com.
Visit this group at http://groups.google.com/group/django-users.
To view this discussion on the web visit
https://groups.google.com/d/msgid/django-users/cee74d3e-3a5a-47b1-9ff9-ef332dc7d162%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
