Thumbnails for Django
Project description
Thumbnails for Django.
Features at a glance
Support for Django 1.11, 2.0, and 2.1 following the Django supported versions policy
Python 3 support
Storage support
Pluggable Engine support for Pillow, ImageMagick, PIL, Wand, pgmagick, and vipsthumbnail
Pluggable Key Value Store support (cached db, redis, and dynamodb by AWS)
Pluggable Backend support
Admin integration with possibility to delete
Dummy generation (placeholders)
Flexible, simple syntax, generates no html
ImageField for model that deletes thumbnails
CSS style cropping options
Back smart cropping, and remove borders from the images when cropping
Margin calculation for vertical positioning
Alternative resolutions versions of a thumbnail
Read more in the documentation (latest version)
Developers
This is a Jazzband project. By contributing you agree to abide by the Contributor Code of Conduct and follow the guidelines.
Feel free to create a new Pull request if you want to propose a new feature. If you need development support or want to discuss with other developers join us in the channel #sorl-thumnbnail at freenode.net or Gitter.
For releases updates and more in deep development discussion use our mailing list in Google Groups.
IRC Channel: irc://irc.freenode.net/#sorl-thumbnail
Mailing List: sorl-thumbnail@googlegroups.com https://groups.google.com/d/forum/sorl-thumbnail
Tests
The tests should run with tox and pytest. Running tox will run all tests for all environments. However, it is possible to run a certain environment with tox -e <env>, a list of all environments can be found with tox -l. These tests require the dependencies of the different engines defined in the documentation. It is possible to install these dependencies into a vagrant image with the Vagrantfile in the repo.
User Support
If you need help using sorl-thumbnail browse http://stackoverflow.com/questions/tagged/sorl-thumbnail and posts your questions with the sorl-thumbnail tag.
How to Use
Get the code
Getting the code for the latest stable release use ‘pip’.
$ pip install sorl-thumbnail
Install in your project
Then register ‘sorl.thumbnail’, in the ‘INSTALLED_APPS’ section of your project’s settings.
INSTALLED_APPS = (
'django.contrib.auth',
'django.contrib.admin',
'django.contrib.sites',
'django.contrib.comments',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.contenttypes',
'sorl.thumbnail',
)
Templates Usage
All of the examples assume that you first load the thumbnail template tag in your template.:
{% load thumbnail %}
A simple usage.
{% thumbnail item.image "100x100" crop="center" as im %}
<img src="{{ im.url }}" width="{{ im.width }}" height="{{ im.height }}">
{% endthumbnail %}
See more examples in the section Template examples in the Documentation
Model Usage
Using the ImageField that automatically deletes references to itself in the key value store and its thumbnail references and the thumbnail files when deleted.:
from django.db import models
from sorl.thumbnail import ImageField
class Item(models.Model):
image = ImageField(upload_to='whatever')
See more examples in the section Model examples in the Documentation
Low level API
You can use the ‘get_thumbnail’:
from sorl.thumbnail import get_thumbnail from sorl.thumbnail import delete im = get_thumbnail(my_file, '100x100', crop='center', quality=99) delete(my_file)
See more examples in the section Low level API examples in the Documentation
Using in combination with other thumbnalers
Alternatively, you load the templatetags by {% load sorl_thumbnail %} instead of traditional {% load thumbnail %}. It’s especially useful in projects that do make use of multiple thumbnailer libraries that use the same name (thumbnail) for the templatetag module:
{% load sorl_thumbnail %}
{% thumbnail item.image "100x100" crop="center" as im %}
<img src="{{ im.url }}" width="{{ im.width }}" height="{{ im.height }}">
{% endthumbnail %}
Frequently asked questions
Is so slow in Amazon S3 !
Possible related to the implementation of your Amazon S3 Backend, see the issue #351 due the storage backend reviews if there is an existing thumbnail when tries to generate the thumbnail that makes an extensive use of the S3 API
A fast workaround if you are not willing to tweak your storage backend is to set:
THUMBNAIL_FORCE_OVERWRITE = True
So it will avoid to overly query the S3 API.
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