How to group by based on month in odoo 11?

Question

How to group by based on month in odoo 11?

<filter string="PO Date" icon="terp-gtk-select-all" domain="[]" context="{'group_by':'order_date'}"/>

<filter string="PO Date"  domain="[]" context="{'group_by':'order_date'}"/>

tried using both the above syntax but not working

Answer 1

You can do like this in Purchase Order Group by based on Month.

<group expand="0" string="Group By">
    <filter string="Order Date" domain="[]" context="{'group_by':'date_order'}"/>
</group>