Hello,

I am a French student. I want test mymod, for workflow.

But I have this error :

AttributeError: 'NoneType' object has no attribute '_name'

mymod.py

# -*- coding: utf-8 -*-
from osv import fields, osv

def mymod_new(self, cr, uid, ids):
     self.write(cr, uid, ids, { 'state' : 'new' })
     return True

def mymod_assigned(self, cr, uid, ids):
     self.write(cr, uid, ids, { 'state' : 'assigned' })
     return True

def mymod_negotiation(self, cr, uid, ids):
     self.write(cr, uid, ids, { 'state' : 'negotiation' })
     return True

def mymod_won(self, cr, uid, ids):
     self.write(cr, uid, ids, { 'state' : 'won' })
     return True

def mymod_lost(self, cr, uid, ids):
     self.write(cr, uid, ids, { 'state' : 'lost' })
     return True

class mymod(osv.osv):
    _name = "mymod.mymod"
    _description = "mymod"
    _columns = { 
    'name' : fields.char("names",),
    'state': fields.selection([
    ('new','New'),
    ('assigned','Assigned'),
    ('negotiation','Negotiation'),
    ('won','Won'),
    ('lost','Lost')], 'Stage', readonly=True),
    }

mymod_workflow.xml

 <?xml version="1.0" encoding="utf-8"?>
    <openerp>
        <data>
            <record model="workflow" id="wkf_mymod">
                <field name="name">mymod.wkf</field>
                <field name="osv">mymod.mymod</field>
                <field name="on_create">True</field>
            </record>
            <record model="workflow.activity" id="act_new">
                <field name="wkf_id" ref="wkf_mymod" />
                <field name="flow_start">True</field>
                <field name="name">new</field>
                <field name="kind">function</field>
                <field name="action">mymod_new()</field>
            </record>

            <record model="workflow.activity" id="act_assigned">
                <field name="wkf_id" ref="wkf_mymod" />
                <field name="name">assigned</field>
                <field name="kind">function</field>
                <field name="action">mymod_assigned()</field>
            </record>

            <record model="workflow.activity" id="act_negotiation">
                <field name="wkf_id" ref="wkf_mymod" />
                <field name="name">negotiation</field>
                <field name="kind">function</field>
                <field name="action">mymod_negotiation()</field>
            </record>

            <record model="workflow.activity" id="act_won">
                <field name="wkf_id" ref="wkf_mymod" />
                <field name="name">won</field>
                <field name="kind">function</field>
                <field name="action">mymod_won()</field>
                <field name="flow_stop">True</field>
            </record>

            <record model="workflow.activity" id="act_lost">
                <field name="wkf_id" ref="wkf_mymod" />
                <field name="name">lost</field>
                <field name="kind">function</field>
                <field name="action">mymod_lost()</field>
                <field name="flow_stop">True</field>
            </record>
            <record model="workflow.transition" id="t1">
                <field name="act_from" ref="act_new" />
                <field name="act_to" ref="act_assigned" />
                <field name="signal">mymod_assigned</field>
            </record>

            <record model="workflow.transition" id="t2">
                <field name="act_from" ref="act_assigned" />
                <field name="act_to" ref="act_negotiation" />
                <field name="signal">mymod_negotiation</field>
            </record>

            <record model="workflow.transition" id="t3">
                <field name="act_from" ref="act_negotiation" />
                <field name="act_to" ref="act_won" />
                <field name="signal">mymod_won</field>
            </record>

            <record model="workflow.transition" id="t4">
                <field name="act_from" ref="act_negotiation" />
                <field name="act_to" ref="act_lost" />
                <field name="signal">mymod_lost</field>
            </record>
        </data>
    </openerp>

mymod_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <record id="mymod_form" model="ir.ui.view">
            <field name="name">mymod.form</field>
            I think ERROR IT'S HERE :
                    <field name="model">mymod.mymod</field>
            <field name="type">form</field>
            <field name="arch" type="xml">
                <form string="nom_form">
                <separator string="Workflow Actions" colspan="4"/>
                <group colspan="4" col="3">
                    <button name="mymod_assigned" string="Assigned" states="new" />
                    <button name="mymod_negotiation" string="In Negotiation" states="assigned" />
                    <button name="mymod_won" string="Won" states="negotiating" />
                    <button name="mymod_lost" string="Lost" states="negotiating" />
                </group>
                </form>
            </field>
        </record>
        <menuitem name="Menu_Work" icon="terp-project" id="dev_menu" />
        <menuitem name="Workflow" parent="dev_menu" id="dev_menu_person" />
        <menuitem name="Boutton" parent="dev_menu_person" id="view_partner_form" action="mymod_form" />
    </data>
</openerp>

Thanks for your help.