<filter string="Salesman" icon="terp-account" domain="[]" context="{'group_by':'user_id'}"/>
<filter string="State" icon="terp-account" domain="[]" context="{'group_by':'state'}"/>
<separator orientation="vertical"/>
- <filter string="Invoice Date" icon="terp-account" domain="[]" context="{group_by':'date_invoice'}"/>
- <filter string="Due Date" icon="terp-account" domain="[]" context="{group_by':'date_due'}"/>
+ <filter string="Invoice Date" icon="terp-account" domain="[]" context="{'group_by':'date_invoice'}"/>
+ <filter string="Due Date" icon="terp-account" domain="[]" context="{'group_by':'date_due'}"/>
</group>
</search>
</field>