Development

Replace this code:

class ProductTemplate(models.Model):
    _inherit = "product.template"

    net_weight = fields.Float(
        compute="_compute_net_weight",
        inverse="_inverse_net_weight",
        store=True,
    )

    @api.depends("product_variant_ids", "product_variant_ids.net_weight")
    def _compute_net_weight(self):
        for template in self:
            if template.product_variant_count == 1:
                template.net_weight = template.product_variant_ids.net_weight
            else:
                template.net_weight = 0.0

    def _inverse_net_weight(self):
        for template in self:
            if len(template.product_variant_ids) == 1:
                template.product_variant_ids.net_weight = template.net_weight

  def _get_related_fields_variant_template(self):
      res = super()._get_related_fields_variant_template()
      res.append("net_weight")
      return res

By this code:

class ProductTemplate(models.Model):
    _inherit = "product.template"

    net_weight = fields.Float(
        compute=lambda x: x._compute_template_field_from_variant_field("net_weight"),
        inverse=lambda x: x._set_product_variant_field("net_weight"),
        store=True,
    )

  def _get_related_fields_variant_template(self):
      res = super()._get_related_fields_variant_template()
      res.append("net_weight")
      return res

Known issues / Roadmap

Do not port this module in version 17.0.

(the feature is native since V17.0)

Bug Tracker

Bugs are tracked on GitHub Issues. In case of trouble, please check there if your issue has already been reported. If you spotted it first, help us to smash it by providing a detailed and welcomed feedback.

Do not contact contributors directly about support or help with technical issues.

Credits

Maintainers

This module is maintained by the OCA.

OCA, or the Odoo Community Association, is a nonprofit organization whose mission is to support the collaborative development of Odoo features and promote its widespread use.

Current maintainer:

This module is part of the OCA/product-attribute project on GitHub.

You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.