ImageSpec with Suffixed Filenames

models.py

from django.db import models
from imagekit import ImageSpec
from imagekit.models import ImageSpecField
from imagekit.utils import get_field_info
from imagekit import register
import os


class TvSpec(ImageSpec):
    suffix = '-tv'

    @property
    def cachefile_name(self):
        instance, attname = get_field_info(self.source)
        name = source_name_as_path(self)
        ext = os.path.splitext(name)[1]
        return u'%s%s%s' % (os.path.dirname(name), self.suffix, ext)


register.generator('myapp:tv', TvSpec)


class MyModel(models.Model):
    thumbnail = ImageSpecField(id='myapp:tv')