How to use the publ.model.Image.get function in Publ

image = _fix_orientation(image)
        except IOError:
            image = None

        if image:
            values['width'] = image.width
            values['height'] = image.height
            values['transparent'] = image.mode in ('RGBA', 'P')
            values['is_asset'] = False
        else:
            # PIL could not figure out what file type this is, so treat it as
            # an asset
            values['is_asset'] = True
            values['asset_name'] = os.path.join(values['checksum'][:5],
                                                os.path.basename(file_path))
        record = model.Image.get(file_path=file_path)
        if record:
            record.set(**values)
        else:
            record = model.Image(**values)
        orm.commit()

    return record

image = fix_orientation(image)
        except IOError:
            image = None

        if image:
            values['width'] = image.width
            values['height'] = image.height
            values['transparent'] = image.mode in ('RGBA', 'P')
            values['is_asset'] = False
        else:
            # PIL could not figure out what file type this is, so treat it as
            # an asset
            values['is_asset'] = True
            values['asset_name'] = os.path.join(values['checksum'][:5],
                                                os.path.basename(file_path))
        record = model.Image.get(file_path=file_path)
        if record:
            record.set(**values)
        else:
            record = model.Image(**values)
        orm.commit()

    return record

def _get_asset(file_path):
    """ Get the database record for an asset file """
    record = model.Image.get(file_path=file_path)
    fingerprint = ','.join((utils.file_fingerprint(file_path),
                            str(RENDITION_VERSION)))
    if not record or record.fingerprint != fingerprint:
        # Reindex the file
        logger.info("Updating image %s -> %s", file_path, fingerprint)

        # compute the md5sum; from https://stackoverflow.com/a/3431838/318857
        md5 = hashlib.md5()
        md5.update(bytes(RENDITION_VERSION))
        with open(file_path, 'rb') as file:
            for chunk in iter(lambda: file.read(16384), b""):
                md5.update(chunk)

        values = {
            'file_path': file_path,
            'checksum': md5.hexdigest(),

def _get_asset(file_path):
    """ Get the database record for an asset file """
    record = model.Image.get(file_path=file_path)
    fingerprint = ','.join((utils.file_fingerprint(file_path),
                            str(RENDITION_VERSION)))
    if not record or record.fingerprint != fingerprint:
        # Reindex the file
        LOGGER.info("Updating image %s -> %s", file_path, fingerprint)

        # compute the md5sum; from https://stackoverflow.com/a/3431838/318857
        md5 = hashlib.md5()
        md5.update(bytes(RENDITION_VERSION))
        with open(file_path, 'rb') as file:
            for chunk in iter(lambda: file.read(16384), b""):
                md5.update(chunk)

        values = {
            'file_path': file_path,
            'checksum': md5.hexdigest(),