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Functional Field Calculation

Arjun Khode
on 3/23/15, 2:12 AM 1,130 views

Hi, I have a product for real esate like flats/villa,

I want to calculate the price as per the area of particular flat/villa if the price is fixed per square feet.

I want to map the price with squre feet.

for example, You have 5000.00 rupees per squre feet and the area for a particular house is 1000 squre feet then price should automatically be calculated to 500000.00.

I have actually done the calculation. I have inherited the sale quotation form and listed out the fields like

- Type of Flat.

- Number of flats purchased.

- Per squre feet price.

- Area of flat.

- Purchase amount.

So, how to calculate the price of a flat from given sq.feet and rate?

Here is my code


from openerp.osv import fields, osv

from openerp.osv import orm

import openerp.addons.decimal_precision as dp

class sale_order(osv.Model):



'flat_type':fields.char('Type of Flat', size=64),

'flat_purchased': fields.float('Number of Flats Purchased', size=10),

'flat_per_sq_ft_price': fields.float('Per Square Feet Price', size=20),

'flat_area': fields.float('Area of Flat', size=20),

'flat_amount':fields.function('_flat_price', digits_compute=dp.get_precision('Account'), string='PurchaseAmount',


'sales_order': (lambda self, cr, uid, ids, c={}: ids, ['flat_per_sq_ft_price', 'flat_area'], 10),



class sale_type(osv.Model):



'type_of_flat':fields.many2one('sale.order','Type of Flat')


def _flat_price(self, cr, uid, ids, field, arg, context=None):

context = context or {}

res = {}

#print("Result for sale order_final Amount")

for sale_order in self.browse(cr, uid, ids, context=context):

# print("For Loop")

res[sale_order.id] = (sale_order.flat_per_sq_price or 0.0) * (sale_order.flat_area or 0.0)

#print("Result for sale order_final Price")


return res


<?xml version="1.0" encoding="utf-8"?>



<record id="sale_view_order_form" model="ir.ui.view">

<field name="model">sale.order</field>

<field name="inherit_id" ref="sale.view_order_form"/>

<field name="arch" type="xml">

<field name="client_order_ref" position="after">

<field name="flat_type"/>

<field name="flat_purchased"/>

<field name="flat_per_sq_ft_price"/>

<field name="flat_area"/>

<field name="flat_amount"/>








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| 5 2 5
--Odoo --

Working in Odoo TEchnologies

On 3/23/15, 2:37 AM

Try Below code.......................it may help .If u want calculate values from differen class use self.pool.get() method.Upvote my answer if it resolve

def _get_model(self, cr, uid, ids, field_name, arg, context=None):*

res = {}

for val in self.pool.get('sale.order').browse(cr, uid, ids, context):

res[val.id] = (val.flat_per_sq_price or 0.0) * (val.flat_area or 0.0) 

return res

_columns = {

'model_name': fields.function(_get_model, string="Sub Model", type='char', store=True)


otherwise just check below link---------


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Asked: 3/23/15, 2:12 AM
Seen: 1130 times
Last updated: 3/24/15, 2:24 AM