def _process_image_data(self, form, model=None):
for field in form:
if isinstance(field, wtf.FileField):
data = None
cfgkey = self.model.__table__.columns.get(field.name).type.cfgkey
aoi = form.data.get(field.name + '_aoi')
if aoi:
aoi = get_box_value(aoi)
if field.data:
# New image upload
data = field.data
elif aoi and model and not getattr(model, field.name + '_aoi') == aoi:
# Same image, aoi updated - need to fetch the image data
data = getattr(model, field.name).original
else:
# Allow form to be edited without replacing existing image
form._fields.pop(field.name)
if data:
try:
if not isinstance(data, FileStorage):
data = get_external_resource(data)
field.data = resize_and_upload(data, cfgkey, aoi)
except IOError, e:
# The form has already been validated at this stage but
# if we return False then BaseModelView.create_view will
# still drop through and render the errors
field.errors = [getattr(e, 'message', str(e))]
return False
def _box_validator(form, field):
try:
get_box_value(field.data)
except (SyntaxError, AssertionError):
raise wtf.ValidationError('Must be of the form: [x1, y1, x2, y2]')
