Opened 10 years ago

Closed 10 years ago

#10514 closed (duplicate)


Reported by: Sebastian Noack Owned by: nobody
Component: Database layer (models, ORM) Version: 1.0
Severity: Keywords:
Cc: Triage Stage: Unreviewed
Has patch: yes Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no


It would be nice, if the QuerySet would respect radd and ror, when combining it with other QuerySets. Note following example:

class PublicArticleQuerySet(QuerySet):
	def iterator(self):
		for obj in  super(VisibleQuerySet, self).iterator():
			obj._is_public = True
			yield obj
	def __or__(self, other):
		# If a PublicArticleQuerySet is or'ed with an other QuerySet
		# we have to clone the other instead of this. So a QuerySet
		# is returned instead of a PublicArticleQuerySet, unless both
		# are PublicArticleQuerySets.
		combined = other._clone()
		combined.query.combine(self.query, sql.OR)
		return combined

	def __and__(self, other):
		# If a PublicArticleQuerySet is and'ed with an other QuerySet
		# we have to clone this instead of the other. So allways a
		# PublicArticleQuerySet is returned.
		combined = self._clone()
		combined.query.combine(other.query, sql.AND)
		return combined

	# We want the behaviour described, also when combining vice versa.
	__ror__ = __or__
	__rand__ = __rand__

class PublicArticleManager(models.Manager):
	def get_query_set(self):
		return PublicArticleQuerySet(self.model).filter(...)

class Article(models.Model):

	objects = models.Manager()
	public_objects = PublicArticleManager()

	def is_public(self):
		if hasattr(self, '_is_public'):
			return self._is_public

I have attached a patch which enables this feature.

Change History (1)

comment:1 Changed 10 years ago by Sebastian Noack

Resolution: duplicate
Status: newclosed

See #10515

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