Consider the following: I have two Person records (Person A and
Person B). A Person can have many Books. As such, Person A has one
Book and Person B has 4 Books (Book has a foreign key relationship to
Person). For the sake of clarity, here are my models:
class Person(models.Model):
name = models.CharField(max_length=100)
def __unicode__(self):
return self.name
class Book(models.Model):
person = models.ForeignKey(Person)
title = models.CharField(choices=LIST_OF_BOOKS)
I open my application and click on the record for Person A.
Subsequently, I open the record for Person B in a new tab (Firefox
3.x). From that point, I update the Book associated with Person A and
click save -- this brings me to my "save()" method in my person view.
Near the beginning of this method, I have code that prints out the
name associated with the Person being edited (>> print person). This
prints out the name of Person A. However, when I execute this next
line of code, I receive an odd response:
>> print len(Book.objects.filter(person=person))
My expectation is that the length will be 1. However, it returns 4.
Upon further inspection, the ORM is returning values associated with
Person B, NOT Person A. Stranger still is that when I run this code:
>> print person.name
...I get the expected name. However, when I run this code immediately
following that line of code:
>> print person.id
...I get the ID of Person B, not Person A.
Am I overlooking something very basic about Django here? For what
it's worth, the problem only appears when I open the application in
separate tabs. If I open the application in separate browsers,
everything works as intended.
Any thoughts on what's going on? I'm using Django 1.0.2 and
Postgresql 8.x, in case it matters.
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