node.js - Javascript VM object returned has wrong reference? -

back again tedious problem. it's easier if explain context before problem. i'm trying build project (in node.js) allows program itself, inside via "input" (this network/console or really, lets assume via console this).

so let's imagine have object:

var database = {     'test': 123 } 

now console type:

;database.myfunc = function() { return database.test; } 

i run using vm.runincontext , copy database object afterwards (it needs sandbox'd because it's non-privileged users running it). works fine, , code works fine when executed in next command:

;database.myfunc() => 123 

all far. @ point built own object dumper can export functions strings (var str = new string(database.myfunc)), works , exports them strings.

this issue comes when import code file. i've tried code this:

code = "retval = " + data.tostring(); sandbox = vm.createcontext({     "database": sb.database }); result = vm.runinnewcontext(code, sandbox); sb.database = result; console.log(sb.database.myfunc()); 

it appears code runs, has access database copied sandbox. isn't want, want access same db had @ first runtime. suggestions how i'd that?

as name implies, vm.runinnewcontext creates different context every time call it. don't use that! instead, use vm.createcontext (once only) vm.runincontext. you'll need maintain reference context returned createcontext().