On Tue, Jan 31, 2012 at 07:59:38AM -0800, Jaroslav Dobrek wrote:
class Lexeme(models.Model):
class Meta:
unique_together = ((u"entity", u"language"),)
I beleive this will not work because Lexeme is not abstract, and
it has no 'entity' field.
language = models.ForeignKey(Language)
# ...
I would like to have different types of lexemes, each of which has
another field type as "entity". Like so:
class CommodityLexeme(Lexeme):
class Meta:
verbose_name_plural = "Commodities"
entity = models.ForeignKey(Commodity)
class CountryLexeme(Lexeme):
class Meta:
verbose_name_plural = "Countries"
entity = models.ForeignKey(Country)
I know this doesn't work, because field name hiding is not permitted.
(See
https://docs.djangoproject.com/en/1.1/topics/db/models/#field-name-hiding-is-not-permitted).
You have not hidden any field names (note that the restriction
only applies to fields inherited from models.Model, not other
attributes, like the Meta class).
But what would be the most elegant workaround? I suppose someone has
had a similar problem before.
I think you can just move the "unique_together" into the Meta
classes for your Lexeme subclasses, and it should work as you
expect.
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