openerp的视图结构是以XML的格式存放于ir.ui.view表中，属于静态格式，设计之后就固定，

但可以通过在model中重写fields_view_get函数，在视图加载时修改arch属性，动态修改视图的结构

Odoo 开发中经常会遇到这样的需求，对象中根据条件是否显示一个字段。比如如果不是创建人，不不显示客户的联系方式，Odoo 中如何实现呢？<一>domain在 odoo 中可以根据对象字段的值或者关系确定是否显示一个字段。

动态 domain 的例子，根据选择结构确定字段是否显示。还有一种方式是，可以在 view 中，根据 states 的值确定字段是否显示。

view 的state

动态视图

用法一、 修改field的属性：

    def fields_view_get(self, cr, uid, view_id=None, view_type=‘form‘, context=None, toolbar=False, submenu=False):
        #override of fields_view_get in order to replace the name field to product template
        if context is None:
            context={}
        res = super(product_product, self).fields_view_get(cr, uid, view_id=view_id, view_type=view_type, context=context, toolbar=toolbar, submenu=submenu)
        #check the current user in group_product_variant
        group_id = self.pool[‘ir.model.data‘].get_object_reference(cr, uid, ‘product‘, ‘group_product_variant‘)[1]
        obj = self.pool.get(‘res.groups‘).browse(cr, uid, group_id, context=context)
        doc = etree.XML(res[‘arch‘])
        if view_type == ‘form‘:
            if obj and uid in [x.id for x in obj.users]:
                for node in doc.xpath("//field[@name=‘name‘]"):
                    node.set(‘invisible‘, ‘1‘)
                    node.set(‘required‘, ‘0‘)
                    setup_modifiers(node, res[‘fields‘][‘name‘])     #这行必须要有
                for node in doc.xpath("//label[@string=‘Product Name‘]"):
                    node.set(‘string‘,‘Product Template‘)
            else:
                for node in doc.xpath("//field[@name=‘product_tmpl_id‘]"):
                    node.set(‘required‘,‘0‘)
                    setup_modifiers(node, res[‘fields‘][‘product_tmpl_id‘])     #这行必须要有
                for node in doc.xpath("//field[@name=‘name‘]"):
                    node.set(‘invisible‘, ‘0‘)
                    setup_modifiers(node, res[‘fields‘][‘name‘])     #这行必须要有
                for node in doc.xpath("//label[@string=‘Product Template‘]"):
                    node.set(‘string‘,‘Product Name‘)
        res[‘arch‘] = etree.tostring(doc)
        return res

1

def fields_view_get(self, cr, uid, view_id=None, view_type=‘form‘, context=None, toolbar=False, submenu=False):  
        if context is None:context = {}  
        res = super(rhwl_gene, self).fields_view_get(cr, uid, view_id=view_id, view_type=view_type, context=context, toolbar=toolbar,submenu=False)  
        if res[‘type‘]=="form":  
            id = res[‘id‘]  
            //根据id去取得资料，并进行判断  
            if 条件成立:  
                doc = etree.XML(res[‘arch‘])  
                doc.xpath("//form")[0].set("edit","false")  
                res[‘arch‘]=etree.tostring(doc)  
        return res 

2

def fields_view_get(self, cr, uid, view_id=None,view_type=‘form‘,context=None,toolbar=False,submenu=False):
        ip_obj = self.pool.get(‘hr.rule.input‘)
        res = super(hr_inputs_editor,self).fields_view_get(cr,uid,view_id,view_type,context,toolbar,submenu)
        if view_type==‘form‘:
            treev = res[‘fields‘][‘line_ids‘][‘views‘][‘tree‘]
            doc = etree.XML(treev[‘arch‘])
            for node in doc.xpath("/tree/field"):
                name = node.get(‘name‘,False)
                if name.startswith(‘value‘):
                    name = name.replace(‘value‘,‘input‘) + ‘_code‘
                    cd = context.has_key(name) and context[name] or False
                    if cd:
                        ip_ids = ip_obj.search(cr,uid,[(‘code‘,‘=‘,cd)],limit=1,context=context)
                        if ip_ids:
                            text = ip_obj.read(cr,uid,ip_ids,[‘name‘])[0][‘name‘]
                            node.set(‘string‘,text)
                    else:
                        node.set(‘modifiers‘,‘{"tree_invisible":true}‘)
            treev[‘arch‘] = etree.tostring(doc)
        return res

用法二、根据条件限制view是否可编辑（网上曾经有个人提出在指定日期内可以编辑，也可以参考下面的代码实现）

@api.model
def fields_view_get(self, view_id=None, view_type=‘form‘, toolbar=False, submenu=False):
    if view_type == ‘form‘:
        res[‘arch‘] = self.fields_view_get_address(res[‘arch‘])
        record = self.env[‘crm.lead‘].browse(self._context.get(‘params‘).get(‘id‘))
        # restrict modification and deletion of child ids
        if record.parent_id:
            res[‘arch‘] = res[‘arch‘][:6] + ‘edit="false" delete="false" ‘ + res[‘arch‘][6:]
        elif record.stage_id.id == 4:  # restrict edition of Purchased Lead
            res[‘arch‘] = res[‘arch‘][:6] + ‘edit="false" ‘ + res[‘arch‘][6:]
    return res

用法三、给视图动态增加field，下面的代码是给某视图动态增加一个field (product_id):

@api.model
def fields_view_get(self, view_id=None, view_type=‘form‘, toolbar=False, submenu=False):
    doc = etree.XML(res[‘arch‘])
    summary = doc.xpath("//field[@name=‘product_id‘]")
    if len(summary):
        summary = summary[0]
        summary.addnext(etree.Element(‘field‘, {‘name‘: ‘product_id‘, 
                                                ‘string‘:‘title of new field‘,
                                                ‘nolabel‘:‘0‘,
                                                }))
    res[‘arch‘] = etree.tostring(eview) 
    return res

用法四、给视图增加一个page（跟用法三有些类似）：

class product_product(osv.osv):
  _inherit = ‘product.product‘
   
  def fields_view_get(self, view_id=None, view_type=‘form‘, toolbar=False,submenu=False):
    """
    Changes the view dynamically
    @param self: The object pointer.
    @return: New arch of view.
    """
    ret_val = super(product_product, self).fields_view_get(view_id, view_type, toolbar,submenu)
    if view_type == ‘form‘:
      doc = etree.XML(ret_val[‘arch‘], parser=None, base_url=None)
       
      #要加入到视图里的page
      _moves_arch_lst = """
        <page string=‘Feature‘>
        </page>
      """
      first_node = doc.xpath("//page[@string=‘Sales‘]")
      if first_node and len(first_node)>0:  
        #先把_moves_arch_lst转成XML Node，然后加到查找到node中
        feature_page = etree.XML(_moves_arch_lst)
        first_node.addnext(feature_page)            
        ret_val[‘arch‘] = etree.tostring(doc, encoding="utf-8")
    return ret_val

动态修改field的domain：

class account_voucher(osv.osv):
    _inherit = ‘account.voucher‘
    def fields_view_get(self, view_id=None, view_type=False, toolbar=False, submenu=False):
        """
            Add domain ‘allow_check_writting = True‘ on journal_id field 
            and remove ‘widget = selection‘ on the same field 
            because the dynamic domain is not allowed on such widget
        """
        if not context: context = {}
        res = super(account_voucher, self).fields_view_get(view_id=view_id, view_type=view_type, toolbar=toolbar, submenu=submenu)
        doc = etree.XML(res[‘arch‘])
        nodes = doc.xpath("//field[@name=‘journal_id‘]")
         
        # 检查context是否有指定的标志（write_check）
        if context.get(‘write_check‘, False) :
            for node in nodes:
             
                # 动态修改 journal_id 这个field的domain
                node.set(‘domain‘, "[(‘type‘, ‘=‘, ‘bank‘), (‘allow_check_writing‘,‘=‘,True),(‘your_field‘,‘=‘,‘value‘)]")
                 
                # 把 widget 清空，原因在上面已经说了
                node.set(‘widget‘, ‘‘)
                 
            res[‘arch‘] = etree.tostring(doc)
        return res




原文链接: http://www.odoogo.com/post/87/#comment-block