AdminImageWidget and AdminImageMixin to use easy_thumbnails in admin site forms for models with ImageField field.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 | import os
from PIL import Image
from django.db import models
from django.conf import settings
from django.contrib.admin.widgets import AdminFileWidget
from django.utils.translation import ugettext as _
from django.utils.safestring import mark_safe
__all__ = ['AdminImageWidget', 'AdminImageMixin']
get_thumbnail = None
try:
from easy_thumbnails.files import get_thumbnailer
except ImportError:
def thumbnail1(image_path):
absolute_url = os.path.join(settings.MEDIA_URL, image_path)
return u'<img src="%s" alt="" width="160" />' % absolute_url
get_thumbnail = thumbnail1
else:
def thumbnail2(image_path):
thumbnailer = get_thumbnailer(image_path)
thumbnail_options = {
'size': (160, 120), 'autocrop': True}
t = thumbnailer.get_thumbnail(thumbnail_options)
media_url = settings.MEDIA_URL
return u'<img src="%s%s" alt=""/>' % (
media_url, t)
get_thumbnail = thumbnail2
class AdminImageWidget(AdminFileWidget):
"""
A FileField Widget that displays an image instead of a file path
if the current file is an image.
"""
def render(self, name, value, attrs=None):
output = []
file_name = str(value)
if file_name:
file_path = ''.join((settings.MEDIA_URL, file_name))
try:
Image.open(os.path.join(settings.MEDIA_ROOT, file_name))
except IOError:
# Not an image
output.append('%s <a target="_blank" href="%s">%s</a> '
'<br />%s ' % (_('Currently:'), file_path,
file_name, _('Change:')))
else:
output.append('<a target="_blank" href="%s">%s</a>' % (
file_path, get_thumbnail(file_name)))
output.append(super(AdminFileWidget, self).render(name, value, attrs))
return mark_safe(u''.join(output))
class AdminImageMixin(object):
"""
This is a mix-in for ModelAdmin subclasses to make ``ImageField``
show nicer form widget
"""
def formfield_for_dbfield(self, db_field, **kwargs):
if isinstance(db_field, models.ImageField):
return db_field.formfield(widget=AdminImageWidget)
sup = super(AdminImageMixin, self)
return sup.formfield_for_dbfield(db_field, **kwargs)
|
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Comments
Thanks, good job :) Тема ;)
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