def can_add_photos_to_tree(self):
# Users can add photos only if they have all
# WRITE_DIRECTLY or WRITE_WITH_AUDIT permissions
# on tree photo
fields = {'tree', 'image', 'thumbnail', 'id'}
perms = self.user.get_instance_permissions(
self.instance, 'TreePhoto')
fieldperms = {perm.field_name
for perm
in perms
if perm.allows_writes}
enabled = feature_enabled(self.instance, 'tree_image_upload')
return enabled and fieldperms == fields
def feature_enabled(self, feature):
return feature_enabled(self, feature)