On Feb 11, 2008, at 9:17 AM, Werner F. Bruhin wrote:
>
> When I try to save an item/object I get the following exception:
>
> Traceback (most recent call last):
> File "C:\Dev\twcb\Program\dialogcontainer.py", line 418, in
> OnSaveButton
> mlDialogs.SaveData(self)
> File "C:\Dev\twcb\Program\multilangdialogs.py", line 34, in SaveData
> self.Getds().save(self.dbLMItem)
> File
> "c:\python25\lib\site-packages\SQLAlchemy-0.4.0-py2.5.egg\sqlalchemy
> \orm\session.py",
> line 793, in save
> _object_mapper(object).cascade_callable('save-update', object,
> File
> "c:\python25\lib\site-packages\SQLAlchemy-0.4.0-py2.5.egg\sqlalchemy
> \orm\mapper.py",
> line 1613, in object_mapper
> raise exceptions.InvalidRequestError("Class '%s' entity name '%s'
> has no mapper associated with it" % (object.__class__.__name__,
> getattr(object, '_entity_name', entity_name)))
> InvalidRequestError: Class 'Mapper' entity name 'None' has no mapper
> associated with it
>
the "entity name" part of the message there is only trying to identify
which mapper the given object is mapped to. but in this case it looks
like you are saving an actual Mapper object (when you should be
sending one of your application's object instances), so thats the
error, i.e.
m = mapper(...)
sess.save(m) # <-- error !
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