How to correctly set gopath on ubuntu 18?

Question

go

The import of local files does not work (ala under-inheritance)

go does not pick up local files, as far as I understand this is due to $GOPATH, but whatever I prescribe it still does not want to run or deletes from import or sees but starts with errors.
the project itself is located at /home/user/www/go-test

Answer 1

Probably the problem is in the contents of GOPATH. A typical GOPATH includes:
$GOPATH/src/ - for sources
$GOPATH/pkg/ - build binaries
$GOPATH/bin/ - run binaries
Accordingly, you should have the following structure:
$GOPATH/src/go-test
$GOPATH /src/go-test/models
If using your current GOPATH then
/home/user/go/src/go-test
/home/user/go/src/go-test/models

Answer 2

You can now use go version 1.11 with modules and start deprecating GOPATH
https://github.com/golang/go/wiki/Modules