Hello All,

I am working on odoo 10 kanban view of purchase order module in which i created a new stage field(many2one relation with stage module) and  as per define stage in  purchase order kanban view get order as per stage 

But as per requirement i want to show all stages including empty one. for that i follow below link 

http://ludwiktrammer.github.io/odoo/odoo-grouping-kanban-view-empty.html

but  i did not find " group_by_full" attribute in kanban view  and not in any other modules like sale or project kanban view

Below in my module.py code in which i try to implement "group_by full" but it did not for me

@api.multi   

def stage_groups(self):   

   postage = self.env['stage.stage'].search([]).name_get() 

   return postage 

group_by_full = {'po_stage': stage_groups,}

below is my view code :

<record id="product_template_only_form_view_kanban" model="ir.ui.view">   

<field name="name">purchase_kanban</field>   

<field name="model">purchase.order</field>   

<field name="inherit_id" ref="purchase.view_purchase_order_kanban"/>  

  <field name="arch" type="xml">     

<!-- Adding attribute -->     

<xpath expr="//kanban[@class='o_kanban_mobile']" position="attributes">           

<attribute name="default_group_by">po_stage</attribute>          

    <attribute name="group_expand">_read_group_stage_ids</attribute>     

    </xpath>     

    <xpath expr="//kanban[@class='o_kanban_mobile']" position="inside">       

          <field name="po_stage"  />

    </xpath>   

</field> 

</record>

so kindly suggest how i can achieved this in odoo 10