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Hi, in my object I have two date fields: date1:fields.date('date 1'), date2:fields.date('date 2'),
I want to retrieve the difference of that 2 fields I tried this : date2 - date1 but I got this error : TypeError: unsupported operand type(s) for -: 'str' and 'str'
Hi mos, You need to do some python level stuffs with dates for getting exact date difference , i will explain with an example
from datetime import datetime
fmt = '%Y-%m-%d'
from_date = '2013-09-01' -> Take your date field1
to_date = '2013-09-31' -> Take your date field2
d1 = datetime.strptime(from_date, fmt)
d2 = datetime.strptime(to_date, fmt)
daysDiff = str((d2-d1).days) -> will gives you 29 days
daysDiff = str((d2-d1).days + 1) -> will gives you 30 days
Hope it helps you ........ Thanks
thank you !
hi nishad thanks for your answer i want to calculate it automatically and show in readonly=True field so can you please provide me some extra detail for calculate duration
Define two date fields(from date , to date) & one functional field(difference_days) to keep the difference days. Do implement the date difference calculation steps in your function and return the value . A functional field in openerp will return a readonly = True value by default. If you want to save data in to DB then use store=True parameter while defining functional field.
my field is 'date_s':fields.datetime('Start Date'), 'date_e':fields.datetime('End Date'), 'duration':fields.function(_get_days, string='Duration', store=True), and my function is this def _get_days(self, cr, uid, ids, field_name, args, context=None): res = {} for date in self.browse(cr, uid, ids, context=context): res[date.id] = ((date.date_s-date.date_e).days) or False return res but it give me error like this res[date.id] = ((date.date_s-date.date_e).days) or False TypeError: unsupport
You need to include 'from datetime import datetime' in the import section and then do a date formatting using 'datetime.strptime(from_date, fmt)' for each date fields where fmt = '%Y-%m-%d' , because we are doing a conversion from openerp datetime format to native python format and then calculating the difference . Do one by one as i shown in my source code instead of doing it in single step.
i correct my function but still i got error like this data_string[found.end():]) ValueError: unconverted data remains: 10:52:57 and my function is def _get_days(self, cr, uid, ids, field_name, args, context=None): res = {} for date in self.browse(cr, uid, ids, context=context): fmt = '%Y-%m-%d' date.date_s = datetime.strptime(date.date_s, fmt) date.date_e = datetime.strptime(date.date_e, fmt) res[date.id] = ((date.date_s-date.date_e).days) or False return res
This is because your fields are of type' datetime' , instead use normal 'date' in openerp.
i already do that but still got erro
hi nishad please help me
def _get_days(self,cr,uid,ids,field_name, arg ,context=None):
res = {},
fmt = '%Y-%m-%d',
for object in self.browse(cr, uid, ids, context=context):
res[object.id] = {'diff_days':0,
}
from_date = object.date_a,
to_date = object.date_b,
d1 = datetime.strptime(from_date, fmt), d2 = datetime.strptime(to_date, fmt) ,daysDiff = str((d2-d1).days), res[object.id]['diff_days'] = daysDiff , return res
'date_a':fields.date("Date1"), 'date_b':fields.date("Date2"), 'diff_days':fields.function(_get_days,string="Diff days", multi='sums',store=True),
Hi nishad thanks for your reply i solve this problem
Hi
I am got this error (TypeError: unsupported operand type(s) for -: 'str' and 'str')when I tried out the above code.
Please can anyone help me out.
Thanks
Hi,
This coluld be helpful.
date = fields.Date.from_string(old_date)
worked_days = (fields.date.today() - date).days
Regards,
Hi Atul Kumar jain
Please how did you solve the above because I am having the same issue
Use timedelta object form python
from datetime import timedelta
https://docs.python.org/2/library/datetime.html#timedelta-objects
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to do this, the first you must convert into date format (use lib datetime: datetime.date(year, month, day)). Then you can use operator '-' in this case. Refer: http://docs.python.org/2/library/datetime.html
thank you !