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PODjango Model with dynamic attributes
 

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    <p>I'm totally, completely new to programming, so please forgive what is probably a stupid question, but I've been beating my head on this for the past couple of days. </p> <p>I have two models, Photos and Thumbnails. I'm trying to come up with an easy, dynamic way to get the thumbnail links for each Photo. I've come up a function that does this (get_thumbs) but I'd like it to run automatically when the model is called (basically so that I get Photo.get_%s_url % thumb.name as soon as the model is available).</p> <p>Below is my models.py. Any help or nudge in the right direction (even if it's just "google blah") would be greatly appreciated. Thanks.</p> <pre><code>class Photo(models.Model): name = models.CharField(max_length=100) original_image = models.ImageField(upload_to='photos') caption = models.TextField(null=True, blank=True) title_slug = models.SlugField(null=True, blank=True, unique=True) rootfilename = models.CharField(max_length=50, editable=False, blank=True) num_views = models.PositiveIntegerField(editable=False, default=0) def __unicode__(self): return self.name thumbnails = Thumbnail.objects.all() def create_thumbs(self): for thumbnail in self.thumbnails: fname = (settings.MEDIA_ROOT + self.rootfilename + '_' + thumbnail.name + '.jpg') if exists(fname): None else: t_img = Image.open(self.original_image.path) t_fit = ImageOps.fit(t_img, (thumbnail.height,thumbnail.width), Image.ANTIALIAS, 0, (0.5,0.5)) t_fit.save(fname,"JPEG") def save(self, *args, **kwargs): self.rootfilename = (self.original_image.name).strip('photos/.jpg') super(Photo, self).save(*args, **kwargs) self.create_thumbs() def get_thumbs(self): for thumb in self.thumbnails: setattr(self, ('get_'+thumb.name+'_url'), ('thumbs/'+self.rootfilename+'_'+thumb.name+'.jpg')) </code></pre>
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    1. CO**You might want to take a look at this answer which weights pros and cons of different solutions:** http://stackoverflow.com/a/7934577/497056
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      1. USIvan Kharlamov
 

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