Sorry for the stupid question, but what's an @property?
By the way, what I have now is below (there are also several other
models).
I will try doing it your way now, although I don't understand the
@property.
class Trip(models.Model):
title = models.CharField(maxlength="500", blank=True)
logbook_entry = models.TextField(blank=True)
cave = models.ForeignKey(Cave,blank=True,null=True)
pushing = models.BooleanField(blank=True,null=True)
rigging = models.BooleanField(blank=True,null=True)
derigging = models.BooleanField(blank=True,null=True)
science = models.BooleanField(blank=True,null=True)
prospecting = models.BooleanField(blank=True,null=True)
cavers = models.ManyToManyField(Caver,blank=True,null=True)
start_date_time = models.DateTimeField()
end_date_time = models.DateTimeField(blank=True,null=True)
def timeUnderground(self):
return self.end_date_time-self.start_date_time
def __str__(self):
return self.title+' | '+self.start_date_time.strftime('%D')
class Admin:
pass
class QM(models.Model):
finding_trip = models.ForeignKey(Trip, related_name='QMs_Found',
edit_inline=models.STACKED)
killing_trip = models.ForeignKey(Trip, related_name='QMs_killed',
null=True,blank=True, edit_inline=models.STACKED)
#the cave field is unneeded- go through trips
#cave = models.ForeignKey(Cave, edit_inline=models.TABULAR,
num_in_admin=3)
number_in_year = models.IntegerField(core=True)
GRADE_CHOICES=(
('A', 'A: Large obvious lead'),
('B', 'B: Average lead'),
('C', 'C: Tight unpromising lead'),
('D', 'D: Dig'),
('X', 'X: Unclimbable aven')
)
grade = models.CharField(maxlength=1, choices=GRADE_CHOICES,
core=True)
location_description = models.TextField(blank=True)
nearest_station = models.CharField(maxlength=400,blank=True)
completion_description = models.TextField(blank=True)
comment=models.TextField(blank=True)
def __str__(self):
QMnumber=str(self.finding_trip.start_date_time.year)
+"-"+str(self.number_in_year)+self.grade
Cave=str(self.finding_trip.cave)
return str(QMnumber+" which is in cave "+Cave)
class Admin:
pass
On Jul 12, 1:35 am, J Meier <[EMAIL PROTECTED]> wrote:
> I might try setting up Trip without direct reference to the QMs, and
> QMs with two references to Trip:
>
> class Trip(models.Model):
> ... trip stuff ...
>
> class QM(models.Model):
> found_during = models.ForeignKey(Trip, related_name=''found_qms")
> killed_during = models.ForeignKey(Trip, null=True, blank=True,
> related_name="killed_qms")
> ... trip stuff ...
>
> and maybe a few convenience methods and properties:
>
> (in Trip):
> @property
> def live_qms(self): return self.found_qms.filter(killed_during=None)
>
> (in QM:)
> @property
> def status(self): return self.killed_during == None and "Live" or
> "Dead"
>
> -Jim
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