Openerp 工作流的流程返回

一个简单的审批工作流程，流程图如下：

普通流程是直线的，这个流程的难点在于增加了一个退回的节点，这就需要在流程设计时，有一个触发信号位于此流程之外。

代码如下：

流程节点定义：

    <record model="workflow.activity" id="act_draft_setting"> <!-- draft -->
        <field name="wkf_id" ref="wkf_holidays_setting" />
        <field name="flow_start">True</field>
        <field name="name">draft_setting</field>
        <!--<field name="action">button_submit()</field>-->
    </record>
    <!-- wait_modify-->
    <record model="workflow.activity" id="act_wait_modify_setting">
        <field name="wkf_id" ref="wkf_holidays_setting" />
        <field name="name">wait_modify_setting</field>
        <field name="kind">function</field>
        <field name="action">button_return()</field>
    </record>

    <record model="workflow.activity" id="act_wait_confirm_setting"> <!-- wait_confirm -->
        <field name="wkf_id" ref="wkf_holidays_setting" />
        <field name="name">wait_confirm_setting</field>
        <field name="kind">function</field>
        <field name="action">button_confirm()</field>
    </record>
    <!-- validate-->
    <record model="workflow.activity" id="act_validate_setting">
        <field name="wkf_id" ref="wkf_holidays_setting" />
        <field name="name">validate_setting</field>
        <field name="kind">function</field>
        <field name="action">button_validate()</field>
    </record>

节点迁移定义：

    <record model="workflow.transition" id="holiday_setting_draft2confirm"> <!-- 1. draft->wait_confirmed (no signal) -->
        <field name="act_from" ref="act_draft_setting" />
        <field name="act_to" ref="act_wait_confirm_setting" />
    </record>

    <record model="workflow.transition" id="holiday_setting_confirm2validate"> <!-- 2. wait_confirm->validate(validate signal)-->
        <field name="act_from" ref="act_wait_confirm_setting" />
        <field name="act_to" ref="act_validate_setting" />
        <field name="signal">validate_setting</field>
        <field name="group_id" ref="base.group_hr_user"/>
    </record>

    <!-- 2. wait_confirm->wait_modify(return signal)-->

    <record model="workflow.transition" id="holiday_setting_confirm2modify">
        <field name="act_from" ref="act_wait_confirm_setting" />
        <field name="act_to" ref="act_wait_modify_setting" />
        <field name="signal">wait_modify_setting</field>
        <field name="group_id" ref="base.group_hr_user"/>
    </record>
    <!-- 2. wait_modify->wait_confirm(submit signal)-->

    <record model="workflow.transition" id="holiday_setting_modify2confirm">
        <field name="act_from" ref="act_wait_modify_setting" />
        <field name="act_to" ref="act_wait_confirm_setting" />
        <field name="signal">button_submit</field>  <!--注意这个信号button_submit不是任何一个流程节点的动作-->
        <field name="group_id" ref="base.group_hr_user"/>
    </record>

xml文件中的button定义：

<button string="审核" name="validate_setting" states="wait_confirm" type="workflow" groups="base.group_hr_user" class="oe_highlight"/>
<button string="退回" name="wait_modify_setting" states="wait_confirm" type="workflow" groups="base.group_hr_user" class="oe_highlight"/>

<!--注意button_submit的type不是workflow-->

<button string="提交" name="button_submit" states="wait_modify" groups="base.group_hr_user" class="oe_highlight"/>

剩下的就是在python中定义每个button的代码即可。