Criteria search in odoo many2one field

# This came up with a huge problem for days, but i resolve it. 
# The main problem is the limitation in form in odoo. Mostly of this are not in the official documentation, 
# so maybe you will feel a bit blind sometimes, but I feel you bro.
# Basically works for partner_id relation for many2one 

# PART ONE
# Create a class res_partner.py
class ResPartner(models.Model):
    """This part is the easy part, @api.model overrides to name_get (optional) and name_search."""
    _inherit = 'res.partner'

    @api.model
    def name_get(self):
        result = []
        for record in self:
            name = '[' + str(record.client_code) + ']' + ' ' + record.name
            result.append((record.id, name))
        return result

    @api.model
    def name_search(self, name='', args=None, operator='ilike', limit=100):
        try:
            int(name) # Special case: I need to filter in case the input us integer only
            args = args if args else []
            args.extend([['client_code', 'ilike', name]])
            name = ''
        except:
            pass # Do nothing
        return super(ResPartner, self).name_search(name=name, args=args, operator=operator, limit=limit)
        
# SECOND PART
# Put the filter in the xml
# res_partner_filter.xml
<odoo>
    <data>
        <record id="view_res_partner_filter" model="ir.ui.view">
            <field name="name">view.res.partner.filter.inherit</field>
            <field name="model">res.partner</field>
            <field name="inherit_id" ref="base.view_res_partner_filter"/>
            <field name="arch" type="xml">
                <field name="name" position="after">
                    <field name="client_code"/>
                </field>
            </field>
        </record>
    </data>
</odoo>