工作流是业务对象描述其动态的模型。工作流程也用来跟踪过程，随着时间的推移发展。
1。简单的工作流
在model里定义一个状态，然后重写相应的几个状态改变的函数
state = fields.Selection([
('draft', "Draft"),
('confirmed', "Confirmed"),
('done', "Done"),
], default='draft')
@api.multi
def action_draft(self):
self.state = 'draft'
@api.multi
def action_confirm(self):
self.state = 'confirmed'
@api.multi
def action_done(self):
self.state = 'done'
然后在视图里定义一个header，分别是按钮动作以及状态显示的bar，按钮名字就是动作函数的名字。
<header>
<button name="action_draft" type="object"
string="Reset to draft"
states="confirmed,done"/>
<button name="action_confirm" type="object"
string="Confirm" states="draft"
class="oe_highlight"/>
<button name="action_done" type="object"
string="Mark as done" states="confirmed"
class="oe_highlight"/>
<field name="state" widget="statusbar"/>
</header>
2.使用odoo的workflow
这样的话，得把 state = fields.Selection([
('draft', "Draft"),
('confirmed', "Confirmed"),
('done', "Done"),
], default='draft')的default='draft'去掉变成
state = fields.Selection([
('draft', "Draft"),
('confirmed', "Confirmed"),
('done', "Done"),
])
然后视图里的header的按钮的type不是object了，改成workflow，按钮的name改成workflow里的activity的id
<header>
<button name="draft" type="workflow"
string="Reset to draft"
states="confirmed,done"/>
<button name="confirm" type="workflow"
string="Confirm" states="draft"
class="oe_highlight"/>
<button name="done" type="workflow"
string="Mark as done" states="confirmed"
class="oe_highlight"/>
<field name="state" widget="statusbar"/>
</header>
然后定义workflow的datafile，工作流，活动，和迁移
<openerp>
<data>
<record model="workflow" id="wkf_session">
<field name="name">OpenAcademy sessions workflow</field>
<field name="osv">openacademy.session</field>
<field name="on_create">True</field>
</record>
<record model="workflow.activity" id="draft">
<field name="name">Draft</field>
<field name="wkf_id" ref="wkf_session"/>
<field name="flow_start" eval="True"/>
<field name="kind">function</field>
<field name="action">action_draft()</field>
</record>
<record model="workflow.activity" id="confirmed">
<field name="name">Confirmed</field>
<field name="wkf_id" ref="wkf_session"/>
<field name="kind">function</field>
<field name="action">action_confirm()</field>
</record>
<record model="workflow.activity" id="done">
<field name="name">Done</field>
<field name="wkf_id" ref="wkf_session"/>
<field name="kind">function</field>
<field name="action">action_done()</field>
</record>
<record model="workflow.transition" id="session_draft_to_confirmed">
<field name="act_from" ref="draft"/>
<field name="act_to" ref="confirmed"/>
<field name="signal">confirm</field>
</record>
<record model="workflow.transition" id="session_confirmed_to_draft">
<field name="act_from" ref="confirmed"/>
<field name="act_to" ref="draft"/>
<field name="signal">draft</field>
</record>
<record model="workflow.transition" id="session_done_to_draft">
<field name="act_from" ref="done"/>
<field name="act_to" ref="draft"/>
<field name="signal">draft</field>
</record>
<record model="workflow.transition" id="session_confirmed_to_done">
<field name="act_from" ref="confirmed"/>
<field name="act_to" ref="done"/>
<field name="signal">done</field>
</record>
</data>
</openerp>
特别注意的是，工作流关联的model只有在记录创建的时候才会创建工作流，所以，定义工作流之前的记录对于工作流来说是失效的。
服务器端action
可以创建一个服务器端的命令来执行python等同于上面的直接调用python
model.search([('id', 'in', context['active_ids'])]).action_draft() active_ids？？要调查