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 res1
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