我写了太简单的odb示例并从文档中复制了所有代码但是在调用db.persist(john)编译时说
/usr/include/odb/traits.hxx:在'struct odb :: object_traits_impl'的实例化中: /usr/include/odb/database.txx:61:28:需要'typename odb :: object_traits :: id_type odb :: database :: persist_(const typename odb :: object_traits :: pointer_type&)[with T = Person ; odb :: database_id DB =(odb :: database_id)1; typename odb :: object_traits :: id_type = odb :: access :: object_traits :: id_type; typename odb :: object_traits :: pointer_type = Person *]' /usr/include/odb/sqlite/database.ixx:47:37:需要'typename odb :: object_traits :: id_type odb :: sqlite :: database :: persist(T *)[with T = Person; typename odb :: object_traits :: id_type = odb :: access :: object_traits :: id_type]' /home/mohsen/Desktop/Workstation/Projects/C++/Rubik/main.cpp:25:21:从这里要求 /usr/include/odb/traits.hxx:177:10:错误:无效使用不完整类型'class odb :: access :: object_traits_impl' struct object_traits_impl:
出了什么问题?
我的代码:
的main.cpp
using namespace std;
using namespace odb::core;
int main(int argc, char **argv) {
odb::sqlite::database db("sqlite.db", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE);
Person john("John", "Doe", 33);
// Person jane("Jane", "Doe", 32);
// Person joe("Joe", "Dirt", 30);
// odb::transaction t(db.begin());
db.persist(john);
// t.commit();
return 0;
}
Person.h
#pragma db object
class Person
{
public:
Person (const std::string& first,
const std::string& last,
unsigned short age)
: first_ (first), last_ (last), age_ (age)
{
}
const std::string&
first () const
{
return first_;
}
const std::string&
last () const
{
return last_;
}
unsigned short
age () const
{
return age_;
}
void
age (unsigned short age)
{
age_ = age;
}
private:
friend class odb::access;
Person () {}
#pragma db id auto
unsigned long id_;
std::string first_;
std::string last_;
unsigned short age_;
};
odb编译命令
odb -dsqlite --generate-query --generate-session --generate-schema --generate-prepared --output -dir/home/mohsen/Desktop/Workstation/Projects/C++/Rubik/cmake-build-debug/odb_gen --hxx-suffix.h --ixx-suffix_inline.h --cxx-suffix.cpp --odb-file-suffix_odbPerson.h
答案 0 :(得分:0)
您收到此错误是因为‘class odb::access::object_traits_impl<Person, (odb::database_id)1>’
在odb生成的文件Person-odb.hxx
中定义。
在main.cpp文件的开头包含"Person-odb.hxx"
可以解决您的问题。