text: Odoo Help
  Odoo is the world's easiest all-in-one management software. It includes hundreds of business apps:
  CRM | e-Commerce | Accounting | Inventory | PoS | Project management | MRP | etc.
  [V8]Use on_change to calculate a timedate field?
  I'm trying to calculate how much time expressed in minutes passed from the creation of a pos.order till the end on a work center. I'm inherit the point_of_sale with a custom module:
  class pos_order(osv.Model): _inherit = 'pos.order'
  def on_change_kot_time(self,cr,user,ids,date_order,x_kot_time,context=None):
  fmt = '%m/%d/%Y %H:%M:%S'
  d1 = datetime.strptime(date_order, fmt)
  d2 = datetime.strptime(x_kot_time, fmt)
  d1_ts = time.mktime(d1.timetuple())
  d2_ts = time.mktime(d2.timetuple())
  timekot = int(d2_ts-d1_ts) / 60
  res = {
  'value': {
  'x_minutes': timekot,
  }
  }
  return res
  but calling the definition with
  <field name="field" on_change="on_change_kot_time(date_order,x_kot_time)/>
  on pos.order for the field date_order and my two custom fields (x_kot_time and x_minutes) didn't out the result and rise no errors. Just a side note: the x_kot_time is a timedate populated by a (working) server action with the python expression
  datetime.datetime.now()
  What I'm
  Have you tried adding alerts in your JS to see what is inside your variables and if it even goes off? I can't see any explicit problem at the moment. Try to debug your values to see if those methods are actually triggered and see what is in the variables.
  Yenthe, I have no idea on how to do that.
  Still stuck. I played around with the Chrome console but I can't see any error. Any idea?
  You could try with a simple window.alert? And if you want to do debugging/logging in Python, this tutorial works great:
  Tried with:And at the end of the function: But the log file remains blank.
  Please note I've changed the name of the variables. Again it works fine directly on pycharm with psycopg2.
  I give up. In less than an hour I create a new .py that is listening to the db and update it out from Odoo. No issues so far after processing more than 500 orders (+/- 900 rows) while using Odoo at the same time. I'm sorry to say that even with the new "skin" Odoo documentation is really inadequate.