Django snippets: Admin Image Widget

from django.contrib.admin.widgets import AdminFileWidget
from django.utils.translation import ugettext as _
from django.utils.safestring import mark_safe
from django.conf import settings
from PIL import Image
import os

try:
    from sorl.thumbnail.main import DjangoThumbnail
    def thumbnail(image_path):
        t = DjangoThumbnail(relative_source=image_path, requested_size=(200,200))
        return u'<img src="%s" alt="%s" />' % (t.absolute_url, image_path)
except ImportError:
    def thumbnail(image_path):
        absolute_url = os.path.join(settings.MEDIA_ROOT, image_path)
        return u'<img src="%s" alt="%s" />' % (absolute_url, image_path)

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 = '%s%s' % (settings.MEDIA_URL, file_name)
            try:            # is image
                Image.open(os.path.join(settings.MEDIA_ROOT, file_name))
                output.append('<a target="_blank" href="%s">%s</a><br />%s <a target="_blank" href="%s">%s</a><br />%s ' % \
                    (file_path, thumbnail(file_name), _('Currently:'), file_path, file_name, _('Change:')))
            except IOError: # not image
                output.append('%s <a target="_blank" href="%s">%s</a> <br />%s ' % \
                    (_('Currently:'), file_path, file_name, _('Change:')))
            
        output.append(super(AdminFileWidget, self).render(name, value, attrs))
        return mark_safe(u''.join(output))

A FileField Widget that displays an image instead of a file path if the current file is an image. Could also be used with sorl.thumbnail to generate thumbnail images.

Example

class FileUploadForm(forms.ModelForm):
    upload = forms.FileField(widget=AdminThumbnailWidget)

    class Meta:
        model = FileUpload

class FileUploadAdmin(admin.ModelAdmin):
    form = FileUploadForm

admin.site.register(FileUpload, FileUploadAdmin)

Author:: baumer1122
Posted:: July 31, 2008
Language:: Python
Tags:: file image newforms-admin nfa widget
Score:: 6 (after 6 ratings)

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KpoH (on August 1, 2008):

thank you!

I've made changes, now it's with thumbnail produces by sorl-thumbnail

from sorl.thumbnail.main import DjangoThumbnail

def thumbnail(image_path):
    t = DjangoThumbnail(relative_source=image_path, requested_size=(80, 80))
    return u'<img src="%s" alt="%s">' % (t.absolute_url, image_path)

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 = []
        if value:
            file_path = '%s%s' % (settings.MEDIA_URL, value)
            try:
                output.append('<a target="_blank" href="%s">%s</a><br />' %
                        (file_path, thumbnail(value)))
            except IOError:
                output.append('%s <a target="_blank" href="%s">%s</a> <br />%s ' %
                        ('Currently:', file_path, value, 'Change:'))

        output.append(super(AdminImageWidget, self).render(name, value, attrs))
        return mark_safe(u''.join(output))

baumer1122 (on August 14, 2008):

updated for filestorage refactor and will use sorl.thumbnail if it is available

mikko (on September 10, 2008):

Hi, I have put something like this in my new project sorl-curator, Check it out!

Django snippets

Admin Image Widget

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