- When clicking on the button displays the list of all documents uploaded to that record

- Documents are taken from ir.attachment model, there are 2 logic:

1 / resource model = res.partner

2 / res_id = res_id of record

- Create a compute field for the button to count all uploaded documents.

my code:

class ResPartner(models.Model):
    _inherit = "res.partner"

    x_phanloai = fields.Selection(string="Phân loại",
                                  selection=[('leader', 'Leader'), ('end-user', 'End-user')])
    x_masothue = fields.Char(string='Mã số thuế', required=True)
    x_mien = fields.Char(string='Miền', related='state_id.x_mien', readonly=True)
    x_attachment_kh = fields.Many2many('ir.attachment', string='Attachment')
    attachment_count = fields.Integer(compute='_compute_attachment_count', string='Attachment')

#đếm số tài liệu khi được upload
    @api.depends('x_attachment_kh')
    def _compute_attachment_count(self):
        for record in self:
            total = 0
            if record.x_attachment_kh:
                for i in record.x_attachment_kh:
                    total += 1
            record.attachment_count = total
---------
<button name="toggle_active" position="before">
    <button class="oe_stat_button" type="action" name="%(base.action_attachment)d"
            icon="fa-file-text-o"
            context="{'search_default_res_id': id}">
        <field string="Hợp Đồng" name="attachment_count" widget="statinfo"/>
    </button>
</button>
All help is helpful for the bowl