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openerp学习笔记 context 的应用

1.在Action中定义,context用于传递搜索条件和分组条件,在搜索视图中默认显示:

示例代码:

<record model="ir.actions.act_window" id="open_company_allocation">            <field name="name">Leaves Summary</field>            <field name="res_model">hr.holidays</field>            <field name="view_type">form</field>            <field name="view_mode">tree,form</field>            <field name="view_id" eval="view_holiday_simple"/>            <field name="context">{search_default_group_type: 1, search_default_validated: 1}</field>            <field name="domain">[(holiday_type,=,employee)]</field>            <field name="search_view_id" ref="view_hr_holidays_filter"/>        </record>

其中:

<field name="context">{‘search_default_group_type‘: 1, ‘search_default_validated‘: 1}</field>
定义了窗口打开时默认的分组条件 group_type 和过滤条件 validated ,如图所示:

111

对应的搜索视图代码:

<record id="view_hr_holidays_filter" model="ir.ui.view">            <field name="name">hr.holidays.filter</field>            <field name="model">hr.holidays</field>            <field name="arch" type="xml">                <search string="Search Leave">                    <field name="name"/>                    <separator/>                    <filter icon="terp-check" domain="[(‘state‘,‘=‘,‘draft‘)]" string="To Confirm"/>                    <filter icon="terp-camera_test" domain="[(‘state‘,‘in‘,(‘confirm‘,‘validate1‘))]" string="To Approve" name="approve"/>                    <filter icon="terp-camera_test" domain="[(‘state‘,‘=‘,‘validate‘)]" string="Validated" name="validated"/>                    <separator/>                    <filter icon="terp-go-year" name="year" string="Year" domain="[(‘holiday_status_id.active‘,‘=‘,True)]" help="Filters only on allocations and requests that belong to an holiday type that is ‘active‘ (active field is True)"/>                    <separator/>                    <filter string="My Leaves" icon="terp-personal" name="my_leaves" domain="[(‘employee_id.user_id‘,‘=‘, uid)]" help="My Leaves"/>                    <separator/>                    <filter string="My Department Leaves" icon="terp-personal+" help="My Department Leaves" domain="[(‘department_id.manager_id‘,‘=‘,uid)]"/>                    <field name="employee_id"/>                    <field name="department_id"/>                    <field name="holiday_status_id"/>                    <group expand="0" string="Group By...">                        <filter name="group_name" string="Description" domain="[]" context="{‘group_by‘:‘name‘}"/>                        <filter name="group_date_from" string="Start Date" icon="terp-personal" domain="[]" context="{‘group_by‘:‘date_from‘}"/>                        <filter name="group_employee" string="Employee" icon="terp-personal" domain="[]" context="{‘group_by‘:‘employee_id‘}"/>                        <filter name="group_category" string="Category" icon="terp-stock_symbol-selection" domain="[]" context="{‘group_by‘:‘category_id‘}"/>                        <filter string="Manager" icon="terp-personal" domain="[]" context="{‘group_by‘:‘manager_id‘}"/>                        <filter string="Department" icon="terp-personal+" domain="[]" context="{‘group_by‘:‘department_id‘,‘set_visible‘:True}"/>                        <filter name="group_type" string="Type" icon="terp-stock_symbol-selection" domain="[]" context="{‘group_by‘:‘holiday_status_id‘}"/>                        <filter string="Status" icon="terp-stock_effects-object-colorize" domain="[]" context="{‘group_by‘:‘state‘}"/>                    </group>                </search>            </field>        </record>

2.在Action中定义,context用于传递创建对象的默认值:

示例代码:XML中定义Action,context用于传递创建对象的默认值

<act_window                id="act_crm_opportunity_crm_phonecall_new"                name="Phone calls"                groups="base.group_sale_salesman"                res_model="crm.phonecall"                view_mode="tree,calendar,form"                context="{‘default_duration‘: 1.0 ,‘default_opportunity_id‘: active_id}"                view_type="form"/>
示例代码:Python后台代码中动态给Action的context赋值,context用于传递创建对象的默认值:
def action_makeMeeting(self, cr, uid, ids, context=None):        """        Open meeting‘s calendar view to schedule meeting on current opportunity.        :return dict: dictionary value for created Meeting view        """        opportunity = self.browse(cr, uid, ids[0], context)        res = self.pool.get(ir.actions.act_window).for_xml_id(cr, uid, base_calendar, action_crm_meeting, context)        res[context] = {            default_opportunity_id: opportunity.id,            default_partner_id: opportunity.partner_id and opportunity.partner_id.id or False,            default_partner_ids : opportunity.partner_id and [opportunity.partner_id.id] or False,            default_user_id: uid,            default_section_id: opportunity.section_id and opportunity.section_id.id or False,            default_email_from: opportunity.email_from,            default_name: opportunity.name,        }        return res

其中:
context="{‘default_duration‘: 1.0 ,‘default_opportunity_id‘: active_id}"

res[‘context‘] = {
  ‘default_opportunity_id‘: opportunity.id,
  ‘default_partner_id‘: opportunity.partner_id and opportunity.partner_id.id or False,
  ‘default_partner_ids‘ : opportunity.partner_id and [opportunity.partner_id.id] or False,
  ‘default_user_id‘: uid,
  ‘default_section_id‘: opportunity.section_id and opportunity.section_id.id or False,
  ‘default_email_from‘: opportunity.email_from,
  ‘default_name‘: opportunity.name,
}
定义了Action对应的对象创建新记录时的默认值。

3.在搜索视图中定义,context用于传递在视图中使用的变量:

示例代码:

<!-- CRM Lead Search View -->        <record id="view_crm_case_leads_filter" model="ir.ui.view">            <field name="name">CRM - Leads Search</field>            <field name="model">crm.lead</field>            <field name="arch" type="xml">                <search string="Search Leads">                    <field name="name" string="Lead / Customer" filter_domain="[‘|‘,‘|‘,(‘partner_name‘,‘ilike‘,self),(‘email_from‘,‘ilike‘,self),(‘name‘,‘ilike‘,self)]"/>                    <field name="categ_ids" string="Category" filter_domain="[(‘categ_ids‘,‘ilike‘,self)]"/>                    <field name="section_id" context="{‘invisible_section‘: False, ‘default_section_id‘: self}"/>                    <field name="user_id"/>                    <field name="partner_id" filter_domain="[(‘partner_id‘,‘child_of‘,self)]"/>                    <field name="create_date"/>                    <field name="country_id" context="{‘invisible_country‘: False}"/>                    <separator/>                    <filter string="Open" name="open" domain="[(‘state‘,‘!=‘,‘cancel‘)]" help="Open Leads"/>                    <filter string="Dead" name="dead" domain="[(‘state‘,‘=‘,‘cancel‘)]"/>                    <filter string="Unassigned" domain="[(‘user_id‘,‘=‘, False)]" help="No salesperson"/>                    <filter string="Unread Messages" name="message_unread" domain="[(‘message_unread‘,‘=‘,True)]" help="Unread messages"/>                    <filter string="Assigned to Me"                            domain="[(‘user_id‘,‘=‘,uid)]" context="{‘invisible_section‘: False}"                            help="Leads that are assigned to me"/>                    <filter string="Assigned to My Team(s)"                            domain="[(‘section_id.member_ids‘, ‘in‘, [uid])]" context="{‘invisible_section‘: False}"                            help="Leads that are assigned to any sales teams I am member of"/>                    <separator />                    <filter string="Available for mass mailing"                            name=not_opt_out domain="[(‘opt_out‘, ‘=‘, False)]"                            help="Leads that did not ask not to be included in mass mailing campaigns"/>                    <separator />                    <group expand="0" string="Group By...">                        <filter string="Salesperson" domain="[]" context="{‘group_by‘:‘user_id‘}"/>                        <filter string="Team" domain="[]" context="{‘group_by‘:‘section_id‘}"/>                        <filter string="Stage" domain="[]" context="{‘group_by‘:‘stage_id‘}"/>                        <filter string="Customer" help="Partner" domain="[]" context="{‘group_by‘:‘partner_id‘}"/>                        <filter string="Country" domain="[]" context="{‘group_by‘:‘country_id‘}"/>                        <filter string="Referrer" domain="[]" context="{‘group_by‘:‘referred‘}"/>                        <filter string="Campaign" domain="[]" context="{‘group_by‘:‘type_id‘}"/>                        <filter string="Channel" domain="[]" context="{‘group_by‘:‘channel_id‘}"/>                        <filter string="Creation" domain="[]" context="{‘group_by‘:‘create_date‘}"/>                    </group>                    <group string="Display">                        <filter string="Show Countries" context="{‘invisible_country‘: False}" help="Show Countries"/>                        <filter string="Show Sales Team" context="{‘invisible_section‘: False}" domain="[]" help="Show Sales Team"/>                    </group>                </search>            </field>        </record>

其中:
<filter string="Show Countries" context="{‘invisible_country‘: False}" help="Show Countries"/>
定义了在搜索视图中选择“显示国家”时,设置变量 invisible_country 的值为 False,tree 视图中引用变量,设置字段“国家”的显示或隐藏,
tree视图中的代码如下所示:
<field name="country_id" invisible="context.get(‘invisible_country‘, True)"/>

4.在Action中定义,context用于传递在后台搜索方法中使用的变量:

示例代码:

<act_window name="Related Products"                    context="{‘related_product‘:1}"                    res_model="product.product"                    src_model="product.product"                    view_mode="tree,form"                    key2="client_action_multi"                    id="action_related_products2"/>

其中:
context="{‘related_product‘:1}"
定义了变量 related_product 的值为 1 ,后台代码中引用变量的代码如下所示:

from osv import osv, fieldsclass product_product(osv.osv):    _inherit = product.product    def search(self, cr, uid, args=None, offset=0, limit=None, order=None,            context=None, count=False):        if context is None:            context = {}        if context.get(related_product) and context.get(active_ids):            bom_obj = self.pool.get(mrp.bom)            product_bom = bom_obj.search(cr,uid, [(product_id, in, context[active_ids])])            parent_bom = [bom.bom_id.id for bom in                    bom_obj.browse(cr,uid, product_bom) if bom.bom_id.id]            rel_ids = [bom.product_id.id for bom in bom_obj.browse(cr, uid, parent_bom)]            args.append((id, in, rel_ids))            return super(product_product, self).search(cr,uid,args,offset,limit,                    order,context=context, count=count)        return super(product_product, self).search(cr,uid,args,offset,limit,                    order,context=context, count=count)product_product()

后台代码中通过继承并覆写search方法,判断 context 中变量 related_product 的值,共用产品视图中实现了根据产品作为BOM的原料而生成的所有产品的的查询(列表)。

5.在后台代码中传递,context用于方法调用过程中变量的传递:

示例代码:

#写入,可用于校验写入和更改数据的合法性    def write(self, cr, uid, ids, vals, context=None):        if context is None:            context = {}        if not context.get(set_to_draft, False): #非设置为草稿状态的操作            for rec in self.browse(cr, uid, ids, context=context):                if rec.state == draft and rec.create_uid.id != uid:                    raise osv.except_osv(_(u警告!),_(u您不能修改他人创建的单据.))        return super(dispatch_sale, self).write(cr, uid, ids, vals, context=context)        #设置为草稿状态    def set_to_draft(self, cr, uid, ids, context=None):        ctx = context.copy()        ctx[set_to_draft] = True #用于在write方法中判断是否是设置为草稿状态的操作        return self.write(cr, uid, ids, {state: draft}, ctx)

其中:
set_to_draft 方法中定义了变量 ctx[‘set_to_draft‘] = True 并作为参数传递到 write 中,
write 方法中判断变量的值 if not context.get(‘set_to_draft‘, False) 执行响应的业务逻辑。