A custom image that allows a remote storage backend to be used. I wrote this to use the ftp backend of django-storages-redux on Heroku.
Use django-storages(-redux) to install a remote backend. Typically installation notes for that particular backend are in the python file defining the backend.:
# settings.py
DEFAULT_FILE_STORAGE = 'storages.backends.<backend_name>.<storage_name>'
MEDIA_URL = '<http://your.media.url/path/to/files/client_side/>''
MEDIA_ROOT = '/path/to/files/server_side/'
# extra settings for your storage backendPlace storageimage before wagtail.wagtailimages in your INSTALLED_APPS list to inject the necessary fields/save method. Or you may set STORAGEIMAGE_SETTINGS['AUTO_INJECTION'] = False and write a custom Image model in the form shown below. Don't forget to have WAGTAILIMAGES_IMAGE_MODEL point to your new model!:
# models.py
from wagtail.wagtailimages.models import AbstractImage, AbstractRendition, \
get_upload_to, image_feature_detection, image_delete, rendition_delete, \
Image as wtImage, Rendition as wtRendition
from storageimage.models import StorageImageField, storage_save
class Image(AbstractImage):
file = StorageImageField(verbose_name=_('File'), upload_to=get_upload_to, width_field='width', height_field='height')
admin_form_fields = wtImage.admin_form_fields + []
def save(self,*args,**kwargs):
return storage_save(self,*args,**kwargs)
class Rendition(AbstractRendition):
image = models.ForeignKey(Image, related_name='renditions')
file = StorageImageField(upload_to='images', width_field='width', height_field='height')
def save(self,*args,**kwargs):
return storage_save(self,*args,**kwargs)
class Meta:
unique_together = (
('image', 'filter', 'focal_point_key'),
)
pre_save.connect(image_feature_detection, sender=Image)
pre_delete.connect(image_delete, sender=Image)
pre_delete.connect(rendition_delete, sender=Rendition)It works, but it's SLOW. TODO: On save, automatically generate known/common Renditions