OpenERP own Prefix Sequence

[dannyeddy]

how to create sequence number in openerp 7 like belowits already supported for\[code\]<field name="prefix">STJ/%(year)s/</field>\[/code\]but i need to add my own record & create like this\[code\]<field name="prefix">%(employer_no)s/</field>\[/code\]employer_no mention in my formplease refer my code in here https://github.com/priyankahdp/openerp/blob/openerp/