def compress(self, data_list):
if data_list:
# if the widget returns False as opposed to None, the "clear" checkbox was checked (this is a Django thing)
if data_list[0] is False:
return False
image_file = data_list[0]
coords_csv = data_list[1]
# an image won't exist here if the image field is being cleared by the user
if image_file:
if IMAGE_FIELD_DELIMITER in image_file.name:
raise forms.ValidationError('You cannot upload image files containing the image field delimiter: \"' + \
IMAGE_FIELD_DELIMITER + '\". You can configure this with the \
IMAGE_FIELD_DELIMITER setting' )
image_file.name = IMAGE_FIELD_DELIMITER.join(
[image_file.name, coords_csv])
return image_file
if coords_csv:
return coords_csv
return None
def save(self, name, content, save=True):
# if the _committed attribute (from the super-class) is True, there is no new image to upload
# that means we are either just changing coordinates (in which case name = coordinates) or not changing anything at all (use self.coords_csv)
if self._committed:
coords_csv = self.coords_csv if hasattr(self, 'coords_csv') else name
stashed_filepath = getattr(self.instance, self.field.name + '_stashed_name').split(IMAGE_FIELD_DELIMITER)[0]
compound_name = IMAGE_FIELD_DELIMITER.join([stashed_filepath, coords_csv])
# get imagekit spec field names --> spec files
spec_dict = dict(zip(self.instance._ik.spec_fields, self.instance._ik.spec_files))
# invalidate imagekit spec files
if self.field.invalidate_on_save:
self.name = self.filename if hasattr(self, 'filename') else stashed_filepath
self.coords_csv = self.coords_csv if hasattr(self, 'coords_csv') else coords_csv
for spec_name in self.field.invalidate_on_save:
if spec_name in spec_dict:
spec = spec_dict.get(spec_name)
spec.delete()
spec.invalidate()
else:
# call the super's save() which will save to storage with the proper filename
# explicitly set the "save" arg to False so that model isn't saved (we don't want to save with actual filename)
storage_name = self.field.generate_filename(self.instance, self.filename)
super(CroppableImageFieldFile, self).save(storage_name, content, save=False)
# create compound filename to save to the model in the database
# must be done *after* the call to the super class in case the storage backend changes the filename (e.g. duplicates)
actual_filepath = getattr(self.instance, self.field.name).name
compound_name = IMAGE_FIELD_DELIMITER.join([actual_filepath, self.coords_csv])
# update name on both self & model instance to compound_name which is what we want to save to the database
setattr(self.instance, self.field.name, compound_name)
self.name = compound_name
# if we were supposed to save the model, now we should actually do it since the filename was reverted above
# (the below 2 lines are also the last 2 lines in the super.save() from Django)
if save:
self.instance.save()
def compress(self, data_list):
if data_list:
# if the widget returns False as opposed to None, the "clear" checkbox was checked (this is a Django thing)
if data_list[0] is False:
return False
image_file = data_list[0]
coords_csv = data_list[1]
# an image won't exist here if the image field is being cleared by the user
if image_file:
if IMAGE_FIELD_DELIMITER in image_file.name:
raise forms.ValidationError('You cannot upload image files containing the image field delimiter: \"' + \
IMAGE_FIELD_DELIMITER + '\". You can configure this with the \
IMAGE_FIELD_DELIMITER setting')
image_file.name = IMAGE_FIELD_DELIMITER.join([image_file.name, coords_csv])
return image_file
if coords_csv:
return coords_csv
return None