I am currently having similar problems. I want to configure salary rule of 20% of sales per month. I am using odoo version 8.0.13. I will be glad if your question is answered.

Thanks

Thanks @Sudhir looks ok - but when i use it as a salary rule to calculate commissions I get

Error Wrong python code defined for salary rule Comm10 (COMM10)

This how i define it:

# Available variables:
#----------------------
# payslip: object containing the payslips
# employee: hr.employee object
# contract: hr.contract object
# rules: object containing the rules code (previously computed)
# categories: object containing the computed salary rule categories (sum of amount of all rules belonging to that category).
# worked_days: object containing the computed worked days.
# inputs: object containing the computed inputs.

# Note: returned value have to be set in the variable 'result'

total_sale_amount = 0.0
sale_order_ids = sale_order_obj.search(cr, uid, [('user_id', '='employee')], context=context)
for sale_order in sale_order_obj.browse(cr, uid, sale_order_ids, context=context):
    total_sale_amount += sale_order.amount_total

result = total_sale_amount * 0.10

BTW I tried it on OERP 6.1 .

Regards,

Here's the COMM10 salary rule defined as python code and always true:

# Available variables:
#----------------------
# payslip: object containing the payslips
# employee: hr.employee object
# contract: hr.contract object
# rules: object containing the rules code (previously computed)
# categories: object containing the computed salary rule categories (sum of amount of all rules belonging to that category).
# worked_days: object containing the computed worked days.
# inputs: object containing the computed inputs.

# Note: returned value have to be set in the variable 'result'
total_sale_amount = 0.0
sale_order_ids = sale_order_obj.search(cr, uid, [('user_id', '=', employee)], context=context)
for sale_order in sale_order_obj.browse(cr, uid, sale_order_ids, context=context):
    total_sale_amount += sale_order.amount_total
print "total_sale_amount::  ", total_sale_amount
return total_sale_amount

result =  total_sale_amount * 0.10

and this is the error reported:

ERROR ? openerp.netsvc: Error Wrong python code defined for salary rule Comm10 (COMM10)