nailbiter is a simple thumbnail generation field for Django, modeled after sorl-thumbnail.

First, define a model using a nailbiter thumbnail field:

In models.py::

from django.contrib.auth.models import User
from django.db import models
from nailbiter.fields import ImageWithThumbsField

class Gallery(models.Model):
    name = models.CharField(max_length=150)
	

class Photo(models.Model):
    uploader = models.ForeignKey(User, related_name="photos")
    gallery = models.ForeignKey(Gallery, related_name="photos")
    title = models.CharField(max_length=150)
    image_file = ImageWithThumbsField(
        upload_to = photo_upload_path,
        generate_on_save = True,
        thumbnail = {'size': (150, 150), 'options': ['detail']},
        extra_thumbnails = {
            'headline': {'size': (300, 300), 'options': ['upscale', 'detail']},
            'avatar': {'size': (64, 64), 'options': ['crop', 'upscale', 'detail']},
            'gallery_icon': {'size': (150, 150), 'options': ['crop', 'upscale', 'detail']}})
    created_date = models.DateTimeField(default=datetime.utcnow)

To display the thumbnail in a template: ::

<img src="https://raw.githubusercontent.com/girasquid/django-nailbiter/master/{{ object.image_file.thumbnail.url }}" />

To display a thumbnail defined in extra_thumbnails, just refer to it by the name you defined: ::

<img src="https://raw.githubusercontent.com/girasquid/django-nailbiter/master/{{ object.image_file.headline.url }}" />