Dynamic methods

[Philipp Pirozhkov]

Hi,

I've stuck with the need to allow JS call arbitrary methods on an object:

class A

  def method_missing method, *args, &block

    puts "method #{method} called"

  end

end

cxt = V8::Context.new

cxt['a'] = A.new

cxt.eval("a.some_method()") # V8::JSError: Object #<rb::A> has no method 'some_method'

Do you think that it's a security flaw to allow the script call any method on an object?

Probably we should allow this if the object has metod_missing defined and only throw JSError if method_missing throws something?

BR, Phil

[Charles Lowell]

[]() is the js equivalent of method_missing. Return a proc, lambda or method object from that.

Sent from my iPhone

[Charles Lowell]

Also remember to yield unless you explicitly want to return nil for a dynamic property. This will allow property resolution to proceed up the prototype chain.

Sent from my iPhone

On Jun 18, 2012, at 13:36, Philipp Pirozhkov <pirj...@gmail.com> wrote:

[Philipp Pirozhkov]

Thanks! Works like a charm. Shame on me I haven't figured it out myself.

Also remember to yield unless you explicitly want to return nil for a dynamic property. This will allow property resolution to proceed up the prototype chain.

You mean calling 'super' instead of returning nil? Yep, sure

[Charles Lowell]

Actually, I mean `yield`. That way it works whether you have a superclass/module with []() defined or not. Remember, we want to go up the JavaScript prototype chain, not the Ruby ancestor chain.

https://github.com/cowboyd/therubyracer/blob/master/lib/v8/access/names.rb#L13-17

Charles Lowell 

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