# Pastebin yO30rq43
MBP-de-Fernando:test-altreus fernando$ cat Schema.pm6 
use Red;

model Organisation is rw {
    has Int   $.id        is id;
    has       @.students  is relationship({.org-id }, :model<Student>);
}

model Student is rw {
    has Str   $.email     is id;
    has Str   $.name      is column;
    has Int   $!org-id    is referencing{ :model<Organisation>, :column<id> };

    has       $.org       is relationship({ .id }, :model<Organisation>);
}
MBP-de-Fernando:test-altreus fernando$ perl6 -e '
use lib ".";

use Red;
use Schema;

my $*RED-DB = database "SQLite", :database<./hootboxes.db>;

Organisation.^create-table;
Student.^create-table;

'
Could not find Organisation at line 0 in:
    file#/Users/fernando/test-altreus
    inst#/Users/fernando/.perl6
    inst#/Users/fernando/.rakudobrew/moar-master/install/share/perl6/site
    inst#/Users/fernando/.rakudobrew/moar-master/install/share/perl6/vendor
    inst#/Users/fernando/.rakudobrew/moar-master/install/share/perl6
    ap#
    nqp#
    perl5#
  in block  at /Users/fernando/.rakudobrew/moar-master/install/share/perl6/site/sources/CFABCF98BD9C98B942745A271CBB8228FD4CE1D3 (Red::Column) line 70
  in method model at /Users/fernando/.rakudobrew/moar-master/install/share/perl6/site/sources/CFABCF98BD9C98B942745A271CBB8228FD4CE1D3 (Red::Column) line 67
  in method CALL-ME at /Users/fernando/.rakudobrew/moar-master/install/share/perl6/site/sources/CFABCF98BD9C98B942745A271CBB8228FD4CE1D3 (Red::Column) line 84
  in method ref at /Users/fernando/.rakudobrew/moar-master/install/share/perl6/site/sources/CFABCF98BD9C98B942745A271CBB8228FD4CE1D3 (Red::Column) line 113
  in method translate at /Users/fernando/.rakudobrew/moar-master/install/share/perl6/site/sources/50D0FE1BEF2BC6114978BE675178ADD972721AEB (Red::Driver::CommonSQL) line 404
  in method translate at /Users/fernando/.rakudobrew/moar-master/install/share/perl6/site/sources/50D0FE1BEF2BC6114978BE675178ADD972721AEB (Red::Driver::CommonSQL) line 384
  in block  at /Users/fernando/.rakudobrew/moar-master/install/share/perl6/site/sources/50D0FE1BEF2BC6114978BE675178ADD972721AEB (Red::Driver::CommonSQL) line 420
  in method translate at /Users/fernando/.rakudobrew/moar-master/install/share/perl6/site/sources/50D0FE1BEF2BC6114978BE675178ADD972721AEB (Red::Driver::CommonSQL) line 416
  in method prepare at /Users/fernando/.rakudobrew/moar-master/install/share/perl6/site/sources/4E8FC4995DF638E75D97947744FAA7BA36E3759F (Red::Driver) line 11
  in method execute at /Users/fernando/.rakudobrew/moar-master/install/share/perl6/site/sources/4E8FC4995DF638E75D97947744FAA7BA36E3759F (Red::Driver) line 37
  in method create-table at /Users/fernando/.rakudobrew/moar-master/install/share/perl6/site/sources/D10D41AB1ED8F1B8E05FB2205140E2E2710D3419 (MetamodelX::Red::Model) line 260
  in block <unit> at -e line 10