AttributeError: 'NoneType' object has no attribute 'get_default_company'

Question

class Sale(osv.osv):
_name = 'sale'

_columns = {
    'name': fields.char('Company Name', size=128)
}

def get_default_company(self, cr, uid, context=None):
    company_id = self.pool.get('res.users').browse(cr, uid, uid).company_id.id,
    return company_id
Sale()

I used above code , all is well but I don't know where and how to call my function get_default_company(). As when I call this method it's give

cr and uid invalids 

Answer 1

It look like you need to set default value for your company. for that you need to use _defaults model attribute which sets default value for your field. like

_defaults = {
    'company_id': get_company
}

before this method you need to define get_company method which should return company id like

def get_company(self, cr, uid, context=None):
    user_rec = self.pool.get('res.users').browse(cr, uid, uid, context)
    return user_rec.company_id.id

and to all this you need a field in _columns. so you also need to add company_id as many2one field. like

_columns = {
    'name': fields.char('Company Name', size=128),
    'company_id': fields.many2one('res.company', "Company")
}

Alter all this your model will look like,

class sale(osv.osv):
    _name = 'sale'

    _columns = {
        'name': fields.char('Company Name', size=128),
        'company_id': fields.many2one('res.company', "Company")
    }


    def get_company(self, cr, uid, context=None):
        user_rec = self.pool.get('res.users').browse(cr, uid, uid, context)
        return user_rec.company_id.id

    _defaults = {
        'company_id': get_company
    }

sale()

Hope This helps!

Answer 2

What is AttributeError: 'NoneType'?

NoneType means that function or instance of whatever Class or Object not working with you, you've actually got None.

---

You are Sale() that's why this error occur, you need to call get_default_company() function, and calling this function before you must implement this method. otherwise give you error (get_default_company function does not exist).

class Sale(osv.osv): 
    _name = 'sale'

    def get_default_company(self, cr, uid, context=None):
        company_id = self.pool.get('res.users').browse(cr, uid, uid).company_id.id,
        return company_id

    get_default_company()             // Call this function

    _columns = {
         'name': fields.char('Company Name', size=128)
    }

And you want to create function field yes you can create check this documentation.

Answer 3

Just add in Sale class _defaults dict. OpenERP will call it automaticly at creating new object.

_defaults = {
        'company_id': get_default_company,
}

For example look at here. More details you can find in OpenERP modules code.