Hi.

I want to make a little change to the def write() function in res.partner.

My first problem is, that I don't find the function "write" in official Odoo10 module "account" in the partner.py file.

The second problem is, that I don't know how I can check if any field is changed. I need to check that and then when something changed I need to set the "state to draft". 

So for example:

@api.model
def write(self):
    self.write({'state': 'draft'})
    return True

Thank you

update:

I have this 2 functions:

@api.multi
def confirm_customer(self):
    self.state = 'confirmed'
    return True

@api.multi
def write(self, data):
    res = super(Partner, self).write(data)
    if self.state == 'confirmed':
        self.state = 'draft'
    return res

After I click my button "confirm_customer" it should go to state=confirmed. It works fine without the "def write" function.

But with the write function it doesn't work.

Now it didn't change the "confirm_customer" state to confirm. It stays all the time on draft.