Skip to main content

Enhanced ImageField with automatically generate thumbnail of the specified image

Project description

.. image::
:alt: Build status

.. image::
:alt: Coverage

.. image::
:alt: Downloads

.. image::
:alt: Latest version

.. image::
:alt: Wheel Status

.. image::
:alt: Egg Status

.. image::
:alt: License

Alisue <>
Supported python versions
2.6, 2.7, 3.2, 3.3, 3.4
Supported django versions
1.3 - 1.6 and 1.7c1

django-thumbnailfield is a enhanced ImageField of Django.
It has the follwing features

- Using Django storage system to store the image (Not like other Thumbnail library)
- Automatically remove previous file from storage
- Automatically generate thumbnails
- Automatically remove generated previous thumbnail files from storage
- Easy to use custom method to generate thumbnails


sudo pip install django-thumbnailfield

Prepare to use

1. Append 'thumbnailfield' to ``INSTALLED_APPS``

2. Set ``MEDIA_ROOT`` correctly.
For example::

MEDIA_ROOT = os.path.join(os.path.dirname(__file__), '../static')

Example mini blog app


from django.db import models
from django.contrib.auth.models import User

from thumbnailfield.fields import ThumbnailField

class Entry(models.Model):
('public', 'public entry'),
('protected', 'login required'),
('private', 'secret entry'),
pub_state = models.CharField('publish status', choices=PUB_STATES)
title = models.CharField('title', max_length=140)
body = models.TextField('body')

# This is a usage of ThumbnailField.
# You have to set ``patterns`` to generate thumbnails
thumbnail = ThumbnailField(_('thumbnail'), upload_to='img/thumbnails', null=True, blank=True,
# Options of PIL method.
# e.g. quality control
'quality': 100,
# Pattern Format:
# <Name>: (
# (<square_size>,), # with defautl process_method
# (<width>, <height>,), # with default process_method
# (<width>, <height>, <method or method_name>),
# (<width>, <height>, <method or method_name>, <method options>),
# )
# If Name is ``None`` that mean original image will be processed
# with the pattern
# Convert original image to sepia and resize it to 800x400 (original
# size is 804x762)
None: ((None, None, 'sepia'), (800, 400, 'resize')),
# Create 640x480 resized thumbnail as large.
'large': ((640, 480, 'resize'),),
# Create 320x240 cropped thumbnail as small. You can write short
# pattern if the number of appling pattern is 1
'small': (320, 240, 'crop', {'left': 0, 'upper': 0}),
# Create 160x120 thumbnail as tiny (use default process_method to
# generate)
'tiny': (160, 120),
# These thumbnails are not generated while accessed. These can be
# accessed with the follwoing code::
# entry.thumbnail.large
# entry.thumbnail.small
# entry.thumbnail.tiny
# # shortcut properties
# entry.thumbnail.large_file # as entry.thumbnail.large.file
# entry.thumbnail.large_path # as entry.thumbnail.large.path
# entry.thumbnail.large_url # as entry.thumbnail.large.url
# entry.thumbnail.large.size # as entry.thumbnail.large.size
# ...


<title>django-thumbnailfield example</title>
<dd><img src="{{ MEDIA_URL }}{{ object.thumbnail }}"></dd>
<dt>Thumbnail "large"</dt>
<dd><img src="{{ MEDIA_URL }}{{ object.thumbnail.large }}"></dd>
<dt>Thumbnail "small"</dt>
<dd><img src="{{ MEDIA_URL }}{{ object.thumbnail.small }}"></dd>
<dt>Thumbnail "tiny"</dt>
<dd><img src="{{ MEDIA_URL }}{{ object.thumbnail.tiny }}"></dd>

How to use custom process method

Create your own custom process method like below::

from django.core.exceptions import ImproperlyConfigured
from thumbnailfield.process_methods import get_sepia_image
from thumbnailfield.process_methods import get_cropped_image

def get_sepia_and_cropped_image(img, width, height, **options):
# do something with img
img = get_sepia_image(img, None, None, **options)
img = get_cropped_image(img, width, height, **options)
return img
def _sepia_and_cropped_error_check(f, img, width, height, **options):
# do some error check
if 'left' not in options:
raise ImproperlyConfigured(f, "'left' is required")
if 'upper' not in options:
raise ImproperlyConfigured(f, "'upper' is required")
# Apply error check function
# Error check is recommended if your process method required any options
# otherwise just forget about this.
get_sepia_and_cropped_image.error_check = _sepia_and_cropped_error_check

Use defined method in pattern like below::

# ...
thumbnail = ThumbnailField('thumbnail', upload_to='thumbnails', patterns = {
'large': (400, 500, get_sepia_and_cropped_image, {'left': 0, 'upper': 0})
# ...

Or define the method in THUMBNAILFIELD_PROCESS_METHOD_TABLE and use as a string anme::

from thumbnailfield import DEFAULT_PROCESS_METHOD_TABLE
THUMBNAILFIELD_PROCESS_METHOD_TABLE['sepia_and_crop'] = get_sepia_and_cropped_image

# ...
thumbnail = ThumbnailField('thumbnail', upload_to='thumbnails', patterns = {
'large': (400, 500, 'sepia_and_crop', {'left': 0, 'upper': 0})
# ...

If ``None`` is specified, that mean do nothing.

# ...
thumbnail = ThumbnailField('thumbnail', upload_to='thumbnails', patterns = {
'original': None,
# ...

Remove previous files (include original file) when new file is applied to
the ThumbnailField.

Default: ``False``

Used when no process_method is applied in process pattern.

Default: ``thumbnail``

Used when no process_options is applied in process pattern.

Default: ``{'resample': Image.ANTIALIAS}``

Used to determine thumbnail filename. ``root``, ``filename``, ``name``
and ``ext`` is passed to the string. The generated filename of the
thumbnail named 'large' of '/some/where/test.png' will be
``/some/where/test.large.png`` in default.

Default: ``r"%(root)s/%(filename)s.%(name)s.%(ext)s"``

Used to determine process method from string name. The key of this dictionary
is a name of the method and value is a method.

``thumbnail``, ``resize``, ``crop``, ``grayscale`` and ``sepia`` are defined
as default.

Default: See ``thumbnailfield.__init__.DEFAULT_PROCESS_METHOD_TABLE``

Options used in PIL image save method.

Default: ``{}``

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

django-thumbnailfield-0.2.5.tar.gz (12.3 kB view hashes)

Uploaded source

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Huawei Huawei PSF Sponsor Microsoft Microsoft PSF Sponsor NVIDIA NVIDIA PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page