runInNewContext

in models 2

    var codes = [];
    fs.readdirSync(app_root + '/app/models/').forEach(function (file) {
        var fileModel = app_root + '/app/models/' + file;
        codes.push({
          'file' : fileModel,
          'text' : fs.readFileSync(fileModel).toString('utf-8')
        });
    });

    var scripts = [];
    for(var i; i<codes.length; i++){
      scripts[i] = vm.createScript(codes[i]['text'], codes[i]['file'])
    }
    scripts.forEach(function(script){
      script.runInNewContext(context)
    })