[odb-users] Mapping a templated wrapper class
R. Cortland Tompkins
cort.tompkins at ipconfigure.com
Mon Sep 9 22:16:15 EDT 2013
> You can probably make it work since the callbacks allow you to detect
> the first/last calls. You could then pass your wrapper as the callback
> argument and trigger its serialization/deserialization.
On second appraisal the callbacks were much more tractable than I had
initially realized. I modified my approach to serialize/deserialize
on-the-fly, went back to using value_traits instead of wrapper_traits, and
modified the MS and Oracle callbacks as required.
On-the-fly serialization is an improvement, but the ODB compiler still
cannot map my wrapper type automatically. E.g.:
unable to map C++ type
char >, ::std::basic_string< char > > >' used in data member 'ptree_'.
Perhaps the ODB compiler fails because my value_traits specializations are
only partial specializations? E.g.:
struct odb::sqlite::default_value_traits<archiveable<T>, id_text>
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