django-managers

Very often I see constructs like MyModel.objects.all().filter(...) which will return a QuerySet of the default Mananger. At first all() seems to be quite redundant, because MyMode.objects.filter(...) delivers the same result. However, this seems to be safe for the default Manager only, because of the following two statements in the Django documentation: Excerpt from the Chapter "Adding extra manager methods" A custom Manager method can return anything you want. It doesn’t have to return a QuerySet. Definition of the all() manager method: all() Returns a copy of the current QuerySet (or

I am using Django '1.5c1' . I have this line in my settings.py: AUTH_USER_MODEL = 'fileupload.galaxyuser' Here's my Galaxyuser model: class GalaxyUser(models.Model): id = models.IntegerField(primary_key=True) create_time = models.DateTimeField(null=True, blank=True) update_time = models.DateTimeField(null=True, blank=True) email = models.CharField(max_length=765) password = models.CharField(max_length=120) external = models.IntegerField(null=True, blank=True) deleted = models.IntegerField(null=True, blank=True) purged = models.IntegerField(null=True, blank=True) username = models.CharField(max

I have two Models in Django. The first has the hierarchy of what job functions (positions) report to which other positions, and the second is people and what job function they hold. class PositionHierarchy(model.Model): pcn = models.CharField(max_length=50) title = models.CharField(max_length=100) level = models.CharField(max_length=25) report_to = models.ForeignKey('PositionHierachy', null=True) class Person(model.Model): first_name = models.CharField(max_length=50) last_name = models.CharField(max_length=50) ... position = models.ForeignKey(PositionHierarchy) When I have a Person record and

i'm trying to get model objects instance in another one. And i raise this error : Manager isn't accessible via topic instance Here's my model : class forum(models.Model): # Some attributs class topic(models.Model): # Some attributs class post(models.Model): # Some attributs def delete(self): forum = self.topic.forum super(post, self).delete() forum.topic_count = topic.objects.filter(forum = forum).count() Here's my view : def test(request, post_id): post = topic.objects.get(id = int(topic_id)) post.delete() And i get : post.delete() forum.topic_count = topic.objects.filter(forum = forum).count

I have a custom manager. I want to use it for related objects. I found use_for_related_fields in docs. But it does not work the way I used it: class RandomQueryset(models.query.QuerySet): def randomize(self): count = self.count() random_index = random.randint(0, count - 1) return self.all()[random_index] class RandomManager(models.Manager): use_for_related_fields = True def get_query_set(self): return RandomQueryset(self.model, using=self._db) def randomize(self): return self.get_query_set().randomize() I used it for one model: >>> post = PostPages.default_manager.filter(image_gallery__isnull

I want to overwrite the custom objects model manager to only return objects a specific user created. Admin users should still return all objects using the objects model manager. Now I have found an approach that could work. They propose to create your own middleware looking like this: #### myproject/middleware/threadlocals.py try: from threading import local except ImportError: # Python 2.3 compatibility from django.utils._threading_local import local _thread_locals = local() def get_current_user(): return getattr(_thread_locals, 'user', None) class ThreadLocals(object): """Middleware that