Hey Collin,
I had no problem in the shell...
In [4]: AffectedPart.objects.all().count()
Out[4]: 4090
# pick a random AffectedPart
In [5]: affpart = AffectedPart.objects.all()[22]
In [6]: affpart.damage_types.all()
Out[6]: [<DamageType: Dent>]
I'm not sure why this doesn't work running under the server.
My models look like this:
from sitar.models import (Part, DamageType, Aircraft)
# this model is in trending.modelsclass AffectedPart(models.Model):
res = models.ForeignKey(Res, null=True)
arising = models.ForeignKey(Arising, null=True)
aircraft = models.ForeignKey(Aircraft)
# filled out automatically only if part to Damage/Repair type matching done
maintenance_phase = models.CharField(max_length=10,
choices=MAINTENANCE_PHASE_CHOICES)
occurrence_date = models.DateField()
partnumber = models.ForeignKey(Part)
damage_types = models.ManyToManyField(DamageType, null=True, blank=True)
repair_types = models.ManyToManyField(RepairType, null=True, blank=True)
def __unicode__(self, ):
if self.res:
parent = self.res.number
else:
parent = str(self.arising)
return '{0} - {1}'.format(self.partnumber.number, parent)
# The following models are in sitar.models class Part(models.Model):
''' This model is used to create pick-lists so the user can associate
one or more applicable parts from a pre-defined list to
a tracked item.
It will also allow for regular CRUD functionality which is
implemented by taking advantage of the Django admin interface. '''
# Added to associate a zone with a part
zones = models.ManyToManyField("Zone", null=True, blank=True)
number = models.CharField(max_length=50, unique=True)
description = models.CharField(max_length=100, blank=True)
comments = models.TextField(blank=True)
material = models.CharField(max_length=100, blank=True)
class Meta:
''' Order by part number field (ascending) when presenting data '''
ordering = ['number']
def __unicode__(self):
''' Return unicode description of a part instance '''
if self.description:
return '%s -- %s' % (self.number, self.description)
else:
return self.number
def get_encoded_part_number(self):
'''
This method will remove any '/' in part numbers and replace them
with '~' so that they can be used in URLs.
'''
return self.number.replace('/','~')
class DamageType(models.Model):
description = models.CharField(max_length=50, unique=True)
# a regular expression to account for possible spelling mistakes when
# querying the database
reg_exp = models.CharField(max_length=50, blank=True)
# Added to provide damage code for TRENDING
cgs_damage_code = models.CharField(max_length=10, blank=True,
verbose_name="CGS Damage Code")
def __unicode__(self):
''' Return unicode representation of a DamageType instance. '''
return self.description
class Meta:
''' Order by description field (ascending) when presenting data '''
ordering = ['description']
def save(self):
''' Override the save method of the DamageType model in order to assign
a regexp if one does not exist.'''
# if the tracked item does not have a reg_exp just use
# the description
if not self.reg_exp:
self.reg_exp = self.description
super(DamageType,self).save()
/Paul
On Tuesday, October 21, 2014 12:52:45 PM UTC-3, Collin Anderson wrote:
>
> Hi Paul,
>
> Interesting. Your code should work fine. So if you run this code in the
> shell it gives a FieldError?
>
> affpart.damage_types.all()
>
> What do your sitar models look like? There should not be a ManyToManyField
> in the other direction.
>
> Collin
>
>
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