I'm (still) working on my computer museum site,
I originally set-up Systems and Images in the database like this:
class System(models.Model):
manufacturer = models.ForeignKey('Manufacturer')
name = models.CharField(max_length=80)
slug = models.CharField(max_length=80)
systemType = models.ForeignKey('Classification')
<cut for brevity>
info = models.TextField()
system_pictures = models.ManyToManyField('Image')
public = models.BooleanField()
def __unicode__(self):
return self.name
def get_header_pic(self):
return self.system_pictures.filter
(image_category__name='Header_Pic')[0]
def get_header_logo(self):
return self.system_pictures.filter
(image_category__name='Header_Logo')[0]
class Image(models.Model):
name = models.CharField(max_length=80)
location = models.URLField()
height = models.IntegerField()
width = models.IntegerField()
image_category = models.ForeignKey('ImageCat')
info = models.TextField()
primary = models.BooleanField()
def __unicode__(self):
return self.name
The Idea was to be able to access all related images to a given system
through, System.image and image_category.
I constantly get interrupted in the development of this, as I'm doing
it on my own time and have 2 kids. :)
When I got the the Magazine articles section, I realized I needed
thumb nail images. Not seeing another way to do it, I added this:
class Thumb(models.Model):
name = models.CharField(max_length=80)
location = models.URLField()
height = models.IntegerField()
width = models.IntegerField()
image_category = models.ForeignKey('ImageCat')
big = models.ForeignKey('Image')
primary = models.BooleanField()
Now, as magazine articles may relate to more that one system, I added
this for Magazines:
class MagPublisher(models.Model):
name = models.CharField(max_length=80)
def __unicode__(self):
return self.name
class Magazine(models.Model):
article = models.CharField(max_length=80)
slug = models.CharField(max_length=80)
date = models.CharField(max_length=40)
system = models.ManyToManyField('System')
publisher = models.ForeignKey('MagPublisher')
imagesmall = models.ManyToManyField('Thumb')
pdf_location = models.URLField(blank=True,null=True)
def __unicode__(self):
return self.article
def get_thumb(self):
return self.imagesmall.filter(primary=True)[0]
This all works fine as it is, but now I'm attempting to make the
system image pages and screen shot pages.
Here is the Question/Problem,
I find myself duplicating the Magazine structure rather than accessing
the images through the System, as I can't see how I could at this
point.
class UnitPic(models.Model):
name = models.CharField(max_length=80)
slug = models.CharField(max_length=80)
system = models.ManyToManyField('System')
imagesmall = models.ManyToManyField('Thumb')
def __unicode__(self):
return self.name
def get_thumb(self):
return self.imagesmall.filter(primary=True)[0]
class ScreenPic(models.Model):
name = models.CharField(max_length=80)
slug = models.CharField(max_length=80)
system = models.ManyToManyField('System')
imagesmall = models.ManyToManyField('Thumb')
def __unicode__(self):
return self.name
def get_thumb(self):
return self.imagesmall.filter(primary=True)[0]
Should I continue this way or should (how could ) I re-work the
System, Image and Thumb models to do the job?
I'm thinking I need another descriptor on the Image model.
Oh, 'primary' marks the Image I want to pull If I only want 1 out of
the set.
Lance F. Squire
P.S. I have the Practical Django Projects book, but it dosn't seem
very useful since the 1.0 version came out. :(
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