[camus2]

expect it is quite hard to write a generic data mapper in go as well. something like Hibernate or Doctrine ORM would be nearly impossible to write with go.i'm not talking about the basic features but advanced features of both frameworks.

[chc]

That is true, but genericity is actually not an inherent attribute of Data Mapper. The key idea is that there are fundamental incompatibilities between two data models (e.g. a structure in your program and a relation in your database), and the translation between the two models is a reified component of the program rather than just being absorbed into the behavior of the object itself as in Active Record.

There are some efforts along these lines, such as gorp (https://github.com/coopernurse/gorp), but I don't think they're all that widely used.