AttributeError：'NoneType'对象没有属性'get' - Python - OpenErp

Question

I need to read a field in an object, which is purchase.order , from another object product.product This field is a selection type field, so if this field has si is selected then do _get_product_available_func(('done')) which is a function already declared in product.product

This is the selection field in purchase.order

'sel_cert' : fields.selection([('si', 'Si'),('no','No')], 'Origen Certificado'),

And this the function which should "retrieve" that field from product.product

def desc_cert(self, cr, uid, ids, field_name, field_args, context=None):
    obj = self.pool.get('purchase.order')
    pids = obj.search(cr, uid, [('sel_cert', '=', 'si')])
    val = self._get_product_available_func(('done'))
    if pids == 'si':
            return val

The function which has _get_product_available_func(('done))

def _get_product_available_func(states, what):
    def _product_available(self, cr, uid, ids, name, arg, context=None):
        return {}.fromkeys(ids, 0.0)
    return _product_available

_product_qty_available = _get_product_available_func(('done',), ('in', 'out'))
_product_certificado_qty = _get_product_available_func(('done',), ('in', 'out'))
_product_virtual_available = _get_product_available_func(('confirmed','waiting','assigned','done'), ('in', 'out'))
_product_outgoing_qty = _get_product_available_func(('confirmed','waiting','assigned'), ('out',))
_product_incoming_qty = _get_product_available_func(('confirmed','waiting','assigned'), ('in',))

So, i need to "execute" _get_product_available_func(('done')) in product.product when field sel_cert in purchase.order has the value si , but is giving me an error, here's the traceback in openerp server:

Server Traceback (most recent call last):
File "C:\Program Files\OpenERP 7.0-20130726-231403\Server\server\openerp\addons\web\session.py", line 89, in send
File "C:\Program Files\OpenERP 7.0-20130726-231403\Server\server\.\openerp\netsvc.py", line 292, in dispatch_rpc
File "C:\Program Files\OpenERP 7.0-20130726-231403\Server\server\.\openerp\service\web_services.py", line 626, in dispatch
File "C:\Program Files\OpenERP 7.0-20130726-231403\Server\server\.\openerp\osv\osv.py", line 188, in execute_kw
File "C:\Program Files\OpenERP 7.0-20130726-231403\Server\server\.\openerp\osv\osv.py", line 131, in wrapper
File "C:\Program Files\OpenERP 7.0-20130726-231403\Server\server\.\openerp\osv\osv.py", line 197, in execute
File "C:\Program Files\OpenERP 7.0-20130726-231403\Server\server\.\openerp\osv\osv.py", line 185, in execute_cr
File "C:\Program Files\OpenERP 7.0-20130726-231403\Server\server\.\openerp\osv\orm.py", line 3604, in read
File "C:\Program Files\OpenERP 7.0-20130726-231403\Server\server\.\openerp\osv\orm.py", line 3724, in _read_flat
File "C:\Program Files\OpenERP 7.0-20130726-231403\Server\server\.\openerp\osv\fields.py", line 1139, in get
AttributeError: 'NoneType' object has no attribute 'get'

Perhaps i should call _product_qty_available instead in _get_product_available_func ?

Anybody could clarify this?

Thanks in advance!

Answer 1

Try this:

def desc_cert(self, cr, uid, ids, field_name, field_args, context=None):
    obj = self.pool.get('purchase.order')
    pids = obj.search(cr, uid, [('sel_cert', '=', 'si')])
    if pids == 'si':
        val = self._get_product_available_func(('done'))
        return val

Or this:

def desc_cert(self, cr, uid, ids, field_name, field_args, context=None):
    if self.pool:
        obj = self.pool.get('purchase.order')
    pids = obj.search(cr, uid, [('sel_cert', '=', 'si')])
    val = self._get_product_available_func(('done'))
    if pids == 'si':
            return val

Answer 2

More ideas:

Try this for once:

def desc_cert(self, cr, uid, ids, field_name, field_args, context=None):
    obj = self.pool.get('purchase.order')
    pids = obj.search(cr, uid, [('sel_cert', '=', 'si')])
    val = self._get_product_available_func(('done'))
    if pids == 'si':
            return val
    return 10

If we get an AttributeError: 'int' object has no attribute 'get' , we know that the fault is indeed in the output of this function.

Another idea:

def desc_cert(self, cr, uid, ids, field_name, field_args, context=None):
    obj = self.pool.get('purchase.order')
    pids = obj.search(cr, uid, [('sel_cert', '=', 'si')])
    val = self._get_product_available_func(('done'))
    if pids.lower() == 'si':
            return val

Now pids may be "si" or "Si".