I have these two models:
class GradeBookColumn(models.Model):
assignment = models.ForeignKey(Assignment,
related_name='grade_book_columns')
section = models.ForeignKey(Section)
when_assigned = models.DateTimeField(blank=True, null=True)
when_due = models.DateTimeField()
class Grade(models.Model):
grade_book_column = models.ForeignKey(GradeBookColumn)
student = models.ForeignKey(User)
when_recorded = models.DateTimeField(auto_now=True)
points = models.FloatField(max_digits=6, decimal_places=2)
I'm trying to get all the grades that belong to a certain student in a
certain section and order them by when the assignments were due.
grades = Grade.objects.filter(student=user,
grade_book_column__section=section).order_by(
'grade_book_column__when_due')
didn't work. (Wouldn't it be cool if it did?) So I went to the docs and
discovered I had to use a dot between the other table and its field. So
I tried
grades = Grade.objects.filter(student=user,
grade_book_column__section=section).order_by(
'grade_book_column.when_due')
but that didn't work either.
What am I doing wrong?
Todd
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