server-backend/server_action_navigate/models/ir_actions_server_navigate_line.py

# Copyright (C) 2020 - Today: GRAP (http://www.grap.coop)
# @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).

from odoo import api, fields, models


class IrActionsServerNavigateLine(models.Model):
    _name = "ir.actions.server.navigate.line"
    _description = "Server Actions Navigation Lines"
    _order = "sequence"

    sequence = fields.Integer(string="Sequence", default=1)

    field_model = fields.Char(
        string="Model", related="field_id.relation", store=True)

    action_id = fields.Many2one(
        comodel_name="ir.actions.server", string="Action",
        required=True, ondelete="cascade")

    field_id = fields.Many2one(
        comodel_name="ir.model.fields", string="Field",
        required=True)

    # when adding a record, onchange is called for every field on the
    # form, also in editable list views
    @api.onchange('field_id')
    def _onchange_field_id(self):
        # check out the docstring of this in odoo/models.py
        lines = self.action_id.resolve_2many_commands(
            'navigate_line_ids',
            self.env.context.get('navigate_line_ids', []),
        )
        lines = sum(map(self.new, lines), self.browse([]))
        model = lines[-1:].field_id.relation or self.action_id.model_id.model
        return {
            'domain': {
                'field_id': [
                    ('ttype', 'in', ['many2one', 'one2many', 'many2many']),
                    ('model', '=', model),
                ],
            }
        }