openerp创建动态视图-fields_view_get

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

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

注意，必须是通过etree将res['arch']加载到DOM中，通过xpath查找并set修改属性，然后将修改后的dom通过etree.tostring(doc)写回res['arch']

如果要修改一对多字段下的子视图时，需要先运算到子视图，如：

treev = res['fields']['line_ids']['views']['tree']