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Admin Image Widget

Author:
baumer1122
Posted:
July 31, 2008
Language:
Python
Version:
.96
Tags:
image newforms-admin widget file nfa
Score:
10 (after 10 ratings)

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)
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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))

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Comments

KpoH (on August 1, 2008):

thank you!

#

KpoH (on August 1, 2008):

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

#

ellis (on August 2, 2009):

Works great! Thanks for this.

One thing: Your example references "AdminThumbnailWidget" when it should be "AdminImageWidget".

#

asinox (on August 19, 2009):

Hi, how ill use it? where save this code?

Thanks

#

stan (on November 10, 2009):

Line 15 in render: absolute_url = os.path.join(settings.MEDIA_ROOT, image_path

It is MEDIA_URL. You don't want to have src="/home/media/../pamela.jpg".

Regards.

#

nemesis (on January 28, 2010):

Hey, really cool, but i'm missing one simple thing.. Where do i have to save this code? I mean how do i add a custom widget? I've been browsing the documentation but still couldn't understand this little simple thing. I noticed widgets are stored in "site-packages/django/contrib/admin/widgets.py" but really, i guessed i don't have to edit that file but create another one somewhere in my project directory. Am I right? It's driving me mad! Help

#

gamesbook (on March 16, 2010):

Hi

class FileUploadForm(forms.ModelForm):

upload = forms.FileField(widget=AdminThumbnailWidget)

should be

class FileUploadForm(forms.ModelForm):

upload = forms.FileField(widget=AdminImageWidget)

#

jcushman (on August 21, 2010):

I think the non-sorl fallback has a bug:

absolute_url = os.path.join(settings.MEDIA_ROOT, image_path)

should be

absolute_url = os.path.join(settings.MEDIA_URL, image_path)

Thanks!

#

bendavis78 (on August 22, 2010):

You should be referencing the storage settings used by the field's "storage" parameter instead of MEDIA_ROOT and MEDIA_URL, as Django allows those to be overridden with custom storage.

#

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