from odoo import models


class PosSession(models.Model):
    _inherit = "pos.session"

    def _get_attributes_by_ptal_id(self):
        """Return the attribute values without inlining their image content.

        ``point_of_sale`` reads the ``image`` field of every
        ``product.attribute.value`` belonging to a ``no_variant`` attribute and
        ships it, base64 encoded, inside the ``load_pos_data`` response --
        repeated once per attribute line using that value.

        The POS front end never uses those bytes: the only reader is
        ``point_of_sale.ColorProductAttribute``, which merely tests the field
        for truthiness and then renders the swatch from
        ``/web/image/product.template.attribute.value/<id>/image``.

        Reading with ``bin_size`` makes the ORM return the human readable
        attachment size (e.g. ``b'827.41 Kb'``) instead of its content, so the
        attachment is never loaded into memory. The value stays truthy, which
        keeps the swatch rendering identical.
        """
        return super(
            PosSession, self.with_context(bin_size=True)
        )._get_attributes_by_ptal_id()