日期格式化字符串：DATE_FORMAT = "%Y-%m-%d"
日期时间格式字符串：DATETIME_FORMAT = "%Y-%m-%d %H:%M:%S"
日期时间格式字符串（包含毫秒）：DATETIME_FORMAT = "%Y-%m-%d %H:%M:%S.%f"
OpenERP对象中字段赋值为当前日期（字符串）：fields.date.context_today，fields.date.context_today(self, cr, uid, context=context)，fields.date.today()
OpenERP对象中字段赋值为当前时间（字符串）：fields.datetime.now()，fields.datetime.context_timestamp(cr, uid, datetime.now(), context=context)
OpenERP官方建议 date/datetime 的默认值的写法是：fields.date.context_today，fields.datetime.now()
字符串转换为日期时间：datetime.datetime.strptime(sale.date, DATE_FORMAT)
日期时间转换为字符串：datetime.datetime.strftime(datetime.date.today(), DATE_FORMAT)
python中获取当前日期：datetime.date.today()
python中获取当前时间：datetime.datetime.now()
OpenERP fields 单元中对 date/datetime 类中方法定义如下所示：
应用示例代码：
#自动获取日期对应的月份并保存
def _get_month(self, cr, uid, ids, field_name, arg, context=None):
res = {}
if context is None:
context = {}
DATETIME_FORMAT = "%Y-%m-%d"
for sale in self.browse(cr, uid, ids, context=context):
saledate = datetime.datetime.strptime(sale.date, DATETIME_FORMAT)
res[sale.id] = saledate.strftime('%Y') + '-' + saledate.strftime('%m')
return res
_columns={
'name':fields.char(u'单号', size=64, select=True, required=True, readonly=True),
'date':fields.date(u'日期', select=True, required=True, readonly=True),
'month':fields.function(_get_month, method=True, type='char', size=10, string = u'月份', store=True, invisible=True),
}
_defaults={
'name': lambda obj, cr, uid, context: '/',
'date':fields.date.context_today,
#'employee_id':_employee_get,
'state':'draft'
}
#自动计算到期日期，按开卡日期加 年数*365 天
def _get_due_date(self, cr, uid, ids, field_name, arg, context=None):
res = {}
if context is None:
context = {}
DATE_FORMAT = "%Y-%m-%d"
for rec in self.browse(cr, uid, ids, context=context):
category = rec.category
if category:
remaining_times=category.times_limit
if rec.active_date:
res[rec.id]=(datetime.datetime.strptime(rec.active_date, DATE_FORMAT) + datetime.timedelta(days=category.age_limit*365)).strftime(DATE_FORMAT)
else:
res[rec.id]=(datetime.date.today()+ datetime.timedelta(days=category.age_limit*365)).strftime(DATE_FORMAT)
return res
_columns={
"name":fields.char("卡号",size=64, required=True, readonly=True, states={'0':[('readonly',False)]}),
"category":fields.many2one("dispatch.service_card_category","服务卡类型", required=True, readonly=True, states={'0':[('readonly',False)]}),
'age_limit':fields.related('category', 'age_limit', string=u'年限', type='float', readonly=True, store=True),
"times_limit":fields.integer(u"初始次数", readonly=True),
"customer":fields.many2one("dispatch.customer","客户",required=True, select=True, readonly=True, states={'0':[('readonly',False)]}),
"remaining_times":fields.integer("剩余次数",required=True, readonly=True, states={'0':[('readonly',False)]}),
"active_date":fields.date("开卡日期",required=True, readonly=True, states={'0':[('readonly',False)]}),
'due_date':fields.function(_get_due_date, method=True, type='date', string = u'到期日期', store=True),
'state': fields.selection([('0', u'未开卡'),('1', u'已开卡'),('2', u'已用完'),('3', u'已过期'),('4', u'已锁定')], u'状态',required=True, readonly=True),
'lock_note': fields.char(u'锁定原因', size=200, invisible=False, readonly=True, states={'1':[('readonly',False)], '4':[('readonly',False)]}),
}
# TODO: can be improved using resource calendar method
#计算日期间隔对应的天数
def _get_number_of_days(self, date_from, date_to):
"""Returns a float equals to the timedelta between two dates given as string."""
DATETIME_FORMAT = "%Y-%m-%d %H:%M:%S"
from_dt = datetime.datetime.strptime(date_from, DATETIME_FORMAT)
to_dt = datetime.datetime.strptime(date_to, DATETIME_FORMAT)
timedelta = to_dt - from_dt
diff_day = timedelta.days + float(timedelta.seconds) / 86400
return diff_day
#对象字段
_columns = {
'date_from': fields.datetime(u'起始日期',required=True, readonly=True, states={'draft':[('readonly',False)]}, select=True),
'date_to': fields.datetime(u'结束日期', readonly=True, states={'draft':[('readonly',False)]}),
'days': fields.float(u'天数', digits=(8, 2), readonly=True, states={'draft':[('readonly',False)]}),
}
#更改起始日期，自动计算请假天数
def onchange_date_from(self, cr, uid, ids, date_to, date_from):
"""
If there are no date set for date_to, automatically set one 8 hours later than
the date_from.
Also update the number_of_days.
"""
# date_to has to be greater than date_from
if (date_from and date_to) and (date_from > date_to):
raise osv.except_osv(_(u'警告!'),_(u'开始日期必须小于结束日期.'))
result = {'value': {}}
# No date_to set so far: automatically compute one 8 hours later
if date_from and not date_to:
date_to_with_delta = datetime.datetime.strptime(date_from, tools.DEFAULT_SERVER_DATETIME_FORMAT) + datetime.timedelta(hours=8)
result['value']['date_to'] = str(date_to_with_delta)
# Compute and update the number of days
if (date_to and date_from) and (date_from <= date_to):
diff_day = self._get_number_of_days(date_from, date_to)
result['value']['days'] = round(math.floor(diff_day))+1
else:
result['value']['days'] = 0
return result
#更改结束日期，自动计算请假天数
def onchange_date_to(self, cr, uid, ids, date_to, date_from):
"""
Update the number_of_days.
"""
# date_to has to be greater than date_from
if (date_from and date_to) and (date_from > date_to):
raise osv.except_osv(_(u'警告!'),_(u'开始日期必须小于结束日期.'))
result = {'value': {}}
# Compute and update the number of days
if (date_to and date_from) and (date_from <= date_to):
diff_day = self._get_number_of_days(date_from, date_to)
result['value']['days'] = round(math.floor(diff_day))+1
else:
result['value']['days'] = 0
return result