OpenERP 7 : 如何在创建表单中设置默认日期？

Question

我是 OpenERP 的新手，Python 我正在尝试在创建表单中设置默认日期，该日期必须是用户使用创建表单后的 28 天。

我最后尝试的是这个：

from datetime import datetime
from datetime import date
from datetime import timedelta
from dateutil.relativedelta import relativedelta

from openerp.osv import fields, osv


class sale_order_dates(osv.osv):
    _inherit = 'sale.order'

    _columns = {
        'requested_date': fields.date('Requested Date', help="Date requested by the customer for the sale."),
    }

    _defaults = {
        'requested_date': date.today() + timedelta(days=28),
    }

sale_order_dates()

但是如果我打开创建表单，我会收到此错误：

"The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application."

可能是因为我无法在_defaults 中进行操作，但我不知道该怎么做，我尝试过在函数中进行操作，但我对函数还不是很满意。你对我该怎么做有什么想法吗？提前致谢

编辑：这是电脑端的错误信息

2015-04-30 19:50:40,217 8666 ERROR Armand werkzeug: Error on request:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 180, in run_wsgi
execute(self.server.app)
File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 168, in execute 
application_iter = app(environ, start_response)
File "/home/odoo/server/7.0/openerp/service/wsgi_server.py", line 417, in application
return application_unproxied(environ, start_response)
File "/home/odoo/server/7.0/openerp/service/wsgi_server.py", line 403, in application_unproxied
result = handler(environ, start_response)
File "/home/odoo/web/7.0/addons/web/http.py", line 528, in __call__
return self.dispatch(environ, start_response)
File "/home/odoo/web/7.0/addons/web/http.py", line 487, in __call__
return self.app(environ, start_wrapped)
File "/usr/local/lib/python2.7/dist-packages/werkzeug/wsgi.py", line 591, in __call__
return self.app(environ, start_response)
File "/home/odoo/web/7.0/addons/web/http.py", line 487, in __call__
return self.app(environ, start_wrapped)
File "/usr/local/lib/python2.7/dist-packages/werkzeug/wsgi.py", line 591, in __call__
return self.app(environ, start_response)
File "/home/odoo/web/7.0/addons/web/http.py", line 553, in dispatch
result = handler(request)
File "/home/odoo/web/7.0/addons/web/http.py", line 618, in <lambda>
return lambda request: JsonRequest(request).dispatch(method)
File "/home/odoo/web/7.0/addons/web/http.py", line 251, in dispatch
body = simplejson.dumps(response)
File "/usr/local/lib/python2.7/dist-packages/simplejson/__init__.py", line 370, in dumps
return _default_encoder.encode(obj)
File "/usr/local/lib/python2.7/dist-packages/simplejson/encoder.py", line 271, in encode
chunks = list(chunks)
File "/usr/local/lib/python2.7/dist-packages/simplejson/encoder.py", line 632, in _iterencode
for chunk in _iterencode_dict(o, _current_indent_level):
File "/usr/local/lib/python2.7/dist-packages/simplejson/encoder.py", line 591, in _iterencode_dict
for chunk in chunks:
File "/usr/local/lib/python2.7/dist-packages/simplejson/encoder.py", line 591, in _iterencode_dict
for chunk in chunks:
File "/usr/local/lib/python2.7/dist-packages/simplejson/encoder.py", line 642, in _iterencode
o = _default(o)
File "/usr/local/lib/python2.7/dist-packages/simplejson/encoder.py", line 246, in default
raise TypeError(repr(o) + " is not JSON serializable")
TypeError: datetime.date(2015, 5, 28) is not JSON serializable

看来是_defaults中的操作不正确，可能这两个字段也不兼容，但我不知道该用什么。

Answer 1

您的代码将在最新代码中正常运行。但是对于您的问题，您需要 return 日期作为字符串，而不是 ORM 预期格式的日期对象。对您的代码进行以下更改。

from datetime import date
from datetime import timedelta
from dateutil.relativedelta import relativedelta

from openerp.osv import fields, osv
from openerp.tools import DEFAULT_SERVER_DATE_FORMAT


class sale_order_dates(osv.osv):
    _inherit = 'sale.order'

    _columns = {
        'requested_date': fields.date('Requested Date', help="Date requested by the customer for the sale."),
    }

    _defaults = {
        'requested_date': (date.today() + timedelta(days=28)).strftime(DEFAULT_SERVER_DATE_FORMAT),
    }

sale_order_dates()

在version 8中，我们在字段定义本身中有一个静态方法来处理这个问题。我们只需要做的是

fields.Date.to_string(date_obj)

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