Question

I can’t figure out how to word this for a google search – pardon. If I have a model like:

c = Color.all

I could say:

c.Color[0].color_name

So if I then have a variable that contains the name of a field in that model like:

b = 'color_name'

How could I say (“c.color_name”) like this using the string with the field name:

c[0].b  

Or, I mean tell Ruby/Rails to use the contents of the vaiable as the field name:

c[0].[the string value of b]

I’ve fumbled around trying everything I can think of but the syntax for this I can’t figure out.

Thanks!

Rails 2.3.5 / Ruby 1.8.7

Answer 1

If b is an instance variable or method of a Color, use the send method from Object

c = Color.all
b = 'color_name'
c[0].send(b.to_sym)