Convert string to class

Nick Brutyn wrote:

hey,

i have these parameters
/backend/fsdocuments/new?parent_class=Product&parent_id=5

parent_id = params[:parent_id] => "5"
parent_class = params[:parent_class] => "Product"

So i need to find Product item with id = 5

Product.find(5)

But how can i convert this string to a object??

Thx

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"Hash".constantize.new #=> {}

_Kevin