Hi group

running Version 2.20.4-stable+timestamp.2020.05.03.05.18.50
with SQL Server 2012 on Win 8.1

I am getting the following error when I try to sum a decimal field in a 
table:

Traceback (most recent call last):
File "C:\w2p\web2py22004py3\gluon\restricted.py", line 219, in restricted
exec(ccode, environment)
File "C:/w2p/web2py22004py3/applications/scanpak/controllers/default.py" 
<http://10.0.0.27:8000/admin/default/edit/scanpak/controllers/default.py>, line 
1948, in <module>
File "C:\w2p\web2py22004py3\gluon\globals.py", line 430, in <lambda>
self._caller = lambda f: f()
File "C:/w2p/web2py22004py3/applications/scanpak/controllers/default.py" 
<http://10.0.0.27:8000/admin/default/edit/scanpak/controllers/default.py>, line 
1941, in scanvsdoc
ss = db(ti.DocNum == doc).select(ti.ItemCode, scnqtysum, groupby = ti.
ItemCode)
File "C:\w2p\web2py22004py3\gluon\packages\dal\pydal\objects.py", line 2634, 
in select
return adapter.select(self.query, fields, attributes)
File "C:\w2p\web2py22004py3\gluon\packages\dal\pydal\adapters\base.py", line 
874, in select
colnames, sql = self._select_wcols(query, fields, **attributes)
File "C:\w2p\web2py22004py3\gluon\packages\dal\pydal\adapters\base.py", line 
768, in _select_wcols
query = self.expand(query, query_env=query_env)
File "C:\w2p\web2py22004py3\gluon\packages\dal\pydal\adapters\base.py", line 
487, in _expand
rv = op(first, second, **optional_args)
File "C:\w2p\web2py22004py3\gluon\packages\dal\pydal\dialects\base.py", line 
406, in eq
self.expand(second, first.type, query_env=query_env),
File "C:\w2p\web2py22004py3\gluon\packages\dal\pydal\dialects\__init__.py", 
line 
97, in expand
return self.adapter.expand(*args, **kwargs)
File "C:\w2p\web2py22004py3\gluon\packages\dal\pydal\adapters\base.py", line 
497, in _expand
rv = self.represent(expression, field_type)
File "C:\w2p\web2py22004py3\gluon\packages\dal\pydal\adapters\base.py", line 
430, in represent
return super(SQLAdapter, self).represent(obj, field_type)
File "C:\w2p\web2py22004py3\gluon\packages\dal\pydal\adapters\base.py", line 
384, in represent
return self.representer.represent(obj, field_type)
File 
"C:\w2p\web2py22004py3\gluon\packages\dal\pydal\representers\__init__.py", line 
246, in represent
rv = self.get_representer_for_type(field_type)(rv, field_type)
File 
"C:\w2p\web2py22004py3\gluon\packages\dal\pydal\representers\__init__.py", line 
138, in __call__
return self.adapt(self.call(value, field_type))
File 
"C:\w2p\web2py22004py3\gluon\packages\dal\pydal\representers\__init__.py", line 
135, in _call
return self.inner_call(value)
File 
"C:\w2p\web2py22004py3\gluon\packages\dal\pydal\representers\__init__.py", line 
123, in _inner_call
return self.obj.f(self.representer, value, **kwargs)
File "C:\w2p\web2py22004py3\gluon\packages\dal\pydal\representers\base.py", 
line 
29, in _integer
return str(long(value))
TypeError: __int__ returned non-int (type NoneType) 

the code looks like this:
  ti = db.itmscan
  scnqtysum = ti.scanqty.sum()
  ss = db(ti.DocNum == doc).select(ti.ItemCode, scnqtysum, groupby = 
ti.ItemCode)

and the table definition:
db.define_table('itmscan',
  Field('DocNum', 'integer'),
  Field('ItemCode', 'string', 20),
  Field('Dscription', 'string', 100),
  Field('box', 'integer', default=1),
  Field('scanqty', 'decimal(19,6)', default=0.0),
  Field('scanid', 'string'),
  Field('empid', 'string'),
  Field('status', 'string'),
  Field('spcins', 'string', default=''),
  Field('tstamp', 'datetime'),
)
I tried adding a represent to the field but it made no difference.

In the code I have a sum on another decimal field from a different table 
just a few lines before the failing one that works just fine. That field is 
also decimal(19,6).

Thanks for any help, if I have made a mistake I can't see it.

Denes

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