Odoo - How to add custom field attribute without modifying by extending

Question

I am trying to use my custom attribute for fields called sf_group. Unfortunately, this attribute is shown when getting field description via fields_get(). Is there a way to add this attribute to the field description? I need to check if this attribute is on the field and what's its value on the JS side.

Note: Odoo - add custom field attribute? didn't help because it only works if you modify the source code which is something I don't want to do.

Thanks!

Answer 1

Found an answer!

from odoo import models, fields, api

class Company(models.Model):
    _inherit = "res.company"
    test_field = fields.Char(string="Test Field", custom_attr="random01")
    def _valid_field_parameter(self, field, name):
        return name == 'custom_attr' or super()._valid_field_parameter(field, name)
    @api.model
    def fields_get(self, allfields=None, attributes=None):
        fields = super().fields_get(allfields=allfields, attributes=attributes)
        for key in fields.keys():
            if key in self._fields and hasattr(self._fields[key], 'custom_attr'):
                fields[key]['custom_attr'] = self._fields[key].custom_attr
        return fields