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annotate banners/models.py @ 1143:14334b2f2323

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author Brian Neal <bgneal@gmail.com>
date Wed, 09 Nov 2016 20:02:14 -0600
parents ee87ea74d46b
children
rev   line source
bgneal@558 1 """
bgneal@558 2 Models for the banners application.
bgneal@558 3
bgneal@558 4 """
bgneal@558 5 import datetime
bgneal@558 6
bgneal@558 7 from django.db import models
bgneal@558 8
bgneal@558 9
bgneal@558 10 class Campaign(models.Model):
bgneal@558 11 """
bgneal@558 12 A model to represent an ad or banner campaign.
bgneal@558 13
bgneal@558 14 """
bgneal@558 15 name = models.CharField(max_length=128)
bgneal@558 16 slug = models.SlugField()
bgneal@558 17 creation_date = models.DateTimeField(blank=True)
bgneal@558 18
bgneal@558 19 def __unicode__(self):
bgneal@558 20 return self.name
bgneal@558 21
bgneal@558 22 class Meta:
bgneal@558 23 ordering = ['name']
bgneal@558 24
bgneal@558 25 def save(self, *args, **kwargs):
bgneal@558 26 if not self.pk and not self.creation_date:
bgneal@558 27 self.creation_date = datetime.datetime.now()
bgneal@558 28
bgneal@558 29 super(Campaign, self).save(*args, **kwargs)
bgneal@558 30
bgneal@558 31
bgneal@558 32 def banner_upload_to(instance, filename):
bgneal@558 33 """
bgneal@558 34 An "upload_to" function for the Banner model.
bgneal@558 35
bgneal@558 36 """
bgneal@558 37 return "banners/%s/%s" % (instance.campaign.slug, filename)
bgneal@558 38
bgneal@558 39
bgneal@558 40 class Banner(models.Model):
bgneal@558 41 """
bgneal@558 42 A model to represent a banner.
bgneal@558 43
bgneal@558 44 """
bgneal@558 45 campaign = models.ForeignKey(Campaign)
bgneal@558 46 image = models.ImageField(upload_to=banner_upload_to)
bgneal@558 47 description = models.CharField(max_length=128)
bgneal@558 48 creation_date = models.DateTimeField(blank=True)
bgneal@558 49
bgneal@558 50 def __unicode__(self):
bgneal@558 51 return self.description
bgneal@558 52
bgneal@558 53 class Meta:
bgneal@558 54 ordering = ['-creation_date']
bgneal@558 55
bgneal@558 56 def save(self, *args, **kwargs):
bgneal@558 57 if not self.pk and not self.creation_date:
bgneal@558 58 self.creation_date = datetime.datetime.now()
bgneal@558 59
bgneal@558 60 super(Banner, self).save(*args, **kwargs)