django-orm

I recently created a SQL dump of a database behind a Django project, and after cleaning the SQL up a little bit was able to restore the DB and all of the data. The problem was the sequences were all mucked up. I tried adding a new user and generated the Python error IntegrityError: duplicate key violates unique constraint . Naturally I figured my SQL dump didn't restart the sequence. But it did: DROP SEQUENCE "auth_user_id_seq" CASCADE; CREATE SEQUENCE "auth_user_id_seq" INCREMENT 1 START 446 MAXVALUE 9223372036854775807 MINVALUE 1 CACHE 1; ALTER TABLE "auth_user_id_seq" OWNER TO "db_user"; I

class Business(models.Model): manager = models.ForeignKey(User, on_delete=models.CASCADE) #... class Event(models.Model): business = models.ForeignKey(Business, on_delete=models.CASCADE) text = models.TextField() when = models.DateTimeField() likes = GenericRelation('Like') class Like(models.Model): person = models.ForeignKey(User, on_delete=models.CASCADE) content_type = models.ForeignKey(ContentType) object_id = models.PositiveIntegerField() content_object = GenericForeignKey('content_type', 'object_id') date = models.DateTimeField(auto_now=True) So I have this structure in models.py . Here

models.py class Area(models.Model): area_name = models.CharField(max_length=255, null=False, blank=False) description = models.TextField(null=False, blank=False) class AreaPoint(models.Model): x_axis = models.FloatField(default=0.0) y_axis = models.FloatField(default=0.0) area = models.OneToOneField(Area,primary_key=True,on_delete=models.CASCADE) I try two method , but both fail ,please guide me. thank you # first method : # Area.objects.filter(id=304).update(area_name="today is 1", description="today is 1", areapoint__x_axis=111,areapoint__y_axis=222) # error : Area has no field named

I am creating a user activity streams. models for activity: class Activity(models.Model): actor = models.ForeignKey(User) action = models.CharField(max_length=100) content_type = models.ForeignKey(ContentType) object_id = models.PositiveIntegerField() content_object = generic.GenericForeignKey('content_type', 'object_id') pub_date = models.DateTimeField(auto_now_add=True, auto_now=False) model for Relationship: class Person(models.Model): user = models.OneToOneField(User) relationships = models.ManyToManyField('self', through='Relationship', symmetrical=False, related_name='related_to')

What I want to do is, whenever I create a new message, I want the sender of the Message to be added to the user of that particular Thread (the Message its relating to). How do I do that? Can it be done by overriding the save method? I can do it in the views.py, but I was hoping it would be better if I can add it in the models.py itself. Any help will be very grateful. Thank you! class Thread(models.Model): user = models.ManyToManyField(User) is_hidden = models.ManyToManyField(User, related_name='hidden_thread', blank=True) def __unicode__(self): return unicode(self.id) class Message(models