建立一个Odoo Module （六）- Workflows

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Workflows

Workflows 是通过model 来描述业务逻辑之间的变化过程，Workflows are also used to track processes that evolve over time.

练习 6-1
给session 添加一个 state field ，用来帮助弄 workflow
一个 session 有3个状态，分别是 Draft（默认），Confirmed， Done
在session form中，添加一个 read-only field 用来显示 state，添加一个button 用来调整 state。

Draft -> Confirmed
Confirmed -> Draft
Confirmed -> Done
Done -> Draft

openacademy/models.py

    attendees_count = fields.Integer(        string="Attendees count", compute='_get_attendees_count', store=True)    # 新增    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'    # 结束    @api.depends('seats', 'attendee_ids')    def _taken_seats(self):        for r in self:

openacademy/views/openacademy.xml

            <field name="model">openacademy.session</field>            <field name="arch" type="xml">                <form string="Session Form">                    <!-- 新增 -->                    <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>                    <!-- 结束 -->                    <sheet>                        <group>                            <group string="General">

workflows 可以与任何 Odoo object 相关联起来，而且完全的可定制化。Workflows 是用来的管理将商业闭环，还可以通过可视化的方式，修改业务之间的转化关系和各种触发条件的钩子。Workflows, activities (nodes or actions) and transitions (conditions) are declared as XML records, as usual. The tokens that navigate in workflows are called workitems.

注意：
workflow 与 session 关联之后，只有新建的 session 才有 workflow instance，之前的 session 都不会有 workflow instance

练习 6-2
替换上面的伪 workflow，用真正的 workflow 来重写，所以 button 点击后，调用的就不是 object的method，而是 workflow的 trigger。
openacademy/__openerp__.py

        'templates.xml',        'views/openacademy.xml',        'views/partner.xml',        'views/session_workflow.xml', # new line    ],    # only loaded in demonstration mode    'demo': [

openacademy/models.py

        ('draft', "Draft"),        ('confirmed', "Confirmed"),        ('done', "Done"),    ])  # 去掉了 default    @api.multi    def action_draft(self):

openacademy/views/openacademy.xml

            <field name="arch" type="xml">                <form string="Session Form">                    <header>                        <!-- 3个 button 的 type 由 object 变为 workflow -->                        <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"/>

openacademy/views/session_workflow.xml

<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>

为了检测，是否建立了 workflow ，可以到 Settings ‣ Technical ‣ Workflows ‣ Instances 查看

练习 6-3
添加一个根据条件自动触发的 workflow

openacademy/views/session_workflow.xml

            <field name="act_to" ref="done"/>            <field name="signal">done</field>        </record>        <!-- 添加 -->        <record model="workflow.transition" id="session_auto_confirm_half_filled">            <field name="act_from" ref="draft"/>            <field name="act_to" ref="confirmed"/>            <field name="condition">taken_seats &gt; 50</field>        </record>    </data></openerp>

练习 6-4
用 server action 代替 python methods
workflow 和 server action 都可以从用户界面，手动建立。

openacademy/views/session_workflow.xml

            <field name="on_create">True</field>        </record>        <!-- 新增 -->        <record model="ir.actions.server" id="set_session_to_draft">            <field name="name">Set session to Draft</field>            <field name="model_id" ref="model_openacademy_session"/>            <field name="code">model.search([('id', 'in', context['active_ids'])]).action_draft()            </field>        </record>        <!-- 结束 -->        <record model="workflow.activity" id="draft">            <field name="name">Draft</field>            <field name="wkf_id" ref="wkf_session"/>            <field name="flow_start" eval="True"/>            <!-- 修改 -->            <field name="kind">dummy</field>            <field name="action"></field>            <field name="action_id" ref="set_session_to_draft"/>            <!-- 结束 -->        </record>        <!-- 新增 -->        <record model="ir.actions.server" id="set_session_to_confirmed">            <field name="name">Set session to Confirmed</field>            <field name="model_id" ref="model_openacademy_session"/>            <field name="code">model.search([('id', 'in', context['active_ids'])]).action_confirm()            </field>        </record>        <!-- 结束 -->        <record model="workflow.activity" id="confirmed">            <field name="name">Confirmed</field>            <field name="wkf_id" ref="wkf_session"/>            <!-- 修改 -->            <field name="kind">dummy</field>            <field name="action"></field>            <field name="action_id" ref="set_session_to_confirmed"/>            <!-- 结束 -->        </record>        <!-- 新增 -->        <record model="ir.actions.server" id="set_session_to_done">            <field name="name">Set session to Done</field>            <field name="model_id" ref="model_openacademy_session"/>            <field name="code">model.search([('id', 'in', context['active_ids'])]).action_done()            </field>        </record>         <!-- 结束 -->        <record model="workflow.activity" id="done">            <field name="name">Done</field>            <field name="wkf_id" ref="wkf_session"/>            <!-- 修改 -->            <field name="kind">dummy</field>            <field name="action"></field>            <field name="action_id" ref="set_session_to_done"/>            <!-- 结束 -->        </record>        <record model="workflow.transition" id="session_draft_to_confirmed">

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