How do I link Odoo clickable statusbar with the workflow? - odoo

Question

I have defined state actions, buttons, and the workflow. They work just fine, the problem is when I tried to add a clickable statusbar and everytime I click the status bar, it won't actually do anything other than changing the record's state.
How do I link the statusbar to the workflow/actions?
model.py
def action_state_draft(self, cr, uid, ids):
self.write(cr, uid, ids, { 'state' : 'draft' })
return True
def action_state_confirmed(self, cr, uid, ids):
self.write(cr, uid, ids, { 'state' : 'confirmed' })
return True
def action_state_posted(self, cr, uid, ids):
self.write(cr, uid, ids, { 'state' : 'posted' })
return True
def action_state_cancelled(self, cr, uid, ids):
self.write(cr, uid, ids, { 'state' : 'cancelled' })
return True
def hello_world(self):
print "Hello World!"
def hello_world_second(self):
print "Hello World Second!"
model_view.xml
<header>
<button name="action_state_confirmed" string="Confirm" states="draft" />
<button name="action_state_posted" string="Post" states="confirmed" />
<button name="action_state_cancelled" string="Cancel" states="draft,confirmed,posted" />
<field name="state" widget="statusbar" clickable="True" statusbar_visible="draft,confirmed,posted,cancelled"/>
</header>
model_workflow.xml
<?xml version="1.0" encoding="UTF-8"?>
<openerp>
<data>
<record id="ig_account_voucher_wkf" model="workflow">
<field name="name">ig.account.voucher.wkf</field>
<field name="osv">ig.account.voucher</field>
<field name="on_create">True</field>
</record>
<record id="act_draft" model="workflow.activity">
<field name="wkf_id" ref="ig_account_voucher_wkf"/>
<field name="name">draft</field>
<field name="flow_start">True</field>
</record>
<record id="act_confirmed" model="workflow.activity">
<field name="wkf_id" ref="ig_account_voucher_wkf"/>
<field name="name">confirmed</field>
<field name="action">
write({'state':'confirmed'})
hello_world()
hello_world_second()
</field>
<field name="kind">function</field>
</record>
<record id="act_posted" model="workflow.activity">
<field name="wkf_id" ref="ig_account_voucher_wkf"/>
<field name="name">posted</field>
<field name="action">write({'state':'posted'})</field>
<field name="kind">function</field>
</record>
<record id="act_posted" model="workflow.activity">
<field name="wkf_id" ref="ig_account_voucher_wkf"/>
<field name="name">cancelled</field>
<field name="action">write({'state':'cancelled'})</field>
<field name="kind">function</field>
<field name="flow_stop">True</field>
</record>
<record id="transition_draft_confirmed" model="workflow.transition">
<field name="act_from" ref="act_draft"/>
<field name="act_to" ref="act_confirmed"/>
<field name="condition">True</field>
<field name="signal">action_state_confirmed</field>
</record>
<record id="transition_confirmed_posted" model="workflow.transition">
<field name="act_from" ref="act_confirmed"/>
<field name="act_to" ref="act_posted"/>
<field name="condition">True</field>
<field name="signal">action_state_posted</field>
</record>
<record id="transition_confirmed_cancelled" model="workflow.transition">
<field name="act_from" ref="act_confirmed"/>
<field name="act_to" ref="act_posted"/>
<field name="condition">True</field>
<field name="signal">action_state_cancelled</field>
</record>
</data>
</openerp>
Another relevant little question: Why do we need workflow instead of just using buttons and actions?

Answer 1

In your code you have missing commas on workflow action when u pass the multiple method in workflow action.
please make is correct first
<record id="act_confirmed" model="workflow.activity">
<field name="wkf_id" ref="ig_account_voucher_wkf"/>
<field name="name">confirmed</field>
<field name="action">
write({'state':'confirmed'}),
hello_world(),
hello_world_second()
</field>
<field name="kind">function</field>
</record>
Another Answer of your Question is :
Why Work flow is needed instead of button ??
The Main Goal is that the work flow is define as the business process flow.
Another goals are :
description of document evolution in time
automatic trigger of actions if some conditions are met
management of company roles and validation steps
management of interactions between the different objects/modules
graphical tool for visualization of document flows
I hope this should helpful for you ..:)