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Added support for empty in() and not_in()

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I wonder why SQL does not have that anyway.
This commit is contained in:
rbock 2015-07-05 13:53:38 +02:00
parent 34376bdd28
commit 2b8a36aa97
2 changed files with 55 additions and 0 deletions
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27
include/sqlpp11/in.h
View File

@ -95,6 +95,33 @@ namespace sqlpp
}
};
template<typename Container>
struct value_list_t;
template<typename Context, typename Operand, typename Container>
struct serializer_t<Context, in_t<Operand, value_list_t<Container>>>
{
using _serialize_check = serialize_check_of<Context, value_list_t<Container>>;
using T = in_t<Operand, value_list_t<Container>>;
static Context& _(const T& t, Context& context)
{
const auto& value_list = std::get<0>(t._args);
if (value_list._container.empty())
{
context << " 'operand in empty list' = 'false' ";
}
else
{
serialize(t._operand, context);
context << " IN(";
serialize(value_list, context);
context << ')';
}
return context;
}
};
}
#endif

28
include/sqlpp11/not_in.h
View File

@ -95,6 +95,34 @@ namespace sqlpp
}
};
template<typename Container>
struct value_list_t;
template<typename Context, typename Operand, typename Container>
struct serializer_t<Context, not_in_t<Operand, value_list_t<Container>>>
{
using _serialize_check = serialize_check_of<Context, value_list_t<Container>>;
using T = not_in_t<Operand, value_list_t<Container>>;
static Context& _(const T& t, Context& context)
{
const auto& value_list = std::get<0>(t._args);
if (value_list._container.empty())
{
context << " 'operand not in empty list' != 'false' ";
}
else
{
serialize(t._operand, context);
context << " NOT IN(";
serialize(value_list, context);
context << ')';
}
return context;
}
};
}
#endif