<form string="Customer Payment">
<group col="6" colspan="4">
<field name="partner_id" required="1" invisible="context.get('line_type', False)" on_change="onchange_partner_id(partner_id, journal_id, amount, currency_id, type, date)" string="Customer"/>
+ <field name="currency_id" invisible="1"/>
<field name="amount"
invisible="context.get('line_type', False)"
string="Paid Amount"