Is_class from a String?

ruby-talk
1

I have a dynamic String entry and I want know if it represents some
any existing Class name (in a given modules set loaded)?

How to do that.
PS.: I'm using Rails and I need to know if there is some Model with a
given name (or symbol).

2

I have a dynamic String entry and I want know if it represents some
any existing Class name (in a given modules set loaded)?

How to do that.
PS.: I'm using Rails and I need to know if there is some Model with a
given name (or symbol).

Hi Leandro:

class Model
end

=> nil

Module.const_get("Model").is_a? Class

=> true

···

On 2/8/07, leandro nascimento camargo <leandroico@gmail.com> wrote:

--
Chris Carter
concentrationstudios.com
brynmawrcs.com

3

Hi Chris...
But If Model doesn't exist I will get an error. =/
You see know the problem?
But maybe I can use const_defined before. =]
I will test here.
Thank you, anyway.

···

Hi Leandro:
>> class Model
>> end
=> nil
>> Module.const_get("Model").is_a? Class

=> true

--
Chris Carter
concentrationstudios.com
brynmawrcs.com

4

Yay!
Solved!
I simply used an exception treatment like this:

is_model =
  begin
    ActiveRecord.const_get(c.name[0...-3].camelize).is_a? Class
  rescue StandardError => e
    false
  end