How to access attribute which are stored as variables

Question

model Sample has attributes car,bike

x ="bike"

y = Sample.new

How can I do?

y.x ?? It gives me an error Is there any way I can do it, I know that x is an attribute but I dont know which one.

So how can I get y.x?

user229044 · Accepted Answer · 2012-06-20 18:48:09Z

2

You can use send to invoke a method on an object when the method is stored as a string:

x = "bike"

y = Sample.new

y.send(x) # Equivalent to y.bike

The following are equivalent, except that you may send protected methods:

object.method_name
object.send("method_name")
object.send(:method_name)

answered Jun 20, 2012 at 18:48

user229044♦

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Comments

Sergio Tulentsev · Accepted Answer · 2012-06-20 18:48:11Z

0

You have to use dynamic message passing. Try this:

y.send :bike

Or, in your case

y.send x

answered Jun 20, 2012 at 18:48

Sergio Tulentsev

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