Can I us this method other than invoice?Because I need to use it in contracts

Hello @veni,

Hello Yes you can use this in contract as well,

As per my knowledge you need to change the required field of name.

First you need to add one field in your .py and .xml file in (hr.contract) object

i.e : sequence_contact = fields.Char(string='Number', copy=False, default=lambda self: self.env['ir.sequence'].next_by_code('hr.contract'))

once you add field files you need to add this code in .xml file.

<record id="sequence_hr_contract" model="ir.sequence">

<field name="name">Contract Sequence</field>

<field name="code">hr.contract</field>

<field name="prefix">FY/%(range_year)s/</field>

<field eval="1" name="number_next"/>

<field eval="1" name="number_increment"/>

<field eval="True" name="use_date_range"/>

<field eval="False" name="company_id"/>

<field name="padding">3</field>

</record>