From: Bala Paranj <bparanj@...>
Date: 2007-06-22T04:15:50+09:00
Subject: Re: undefined method 'a=' when initializing an object

I have an array that contains list of attributes of a ActiveRecord
object. I have another array that contains list of values for those
attributes.

So for a Foo object,

attributes_list = ["first_name", "last_name"]
values_list = ["Bugs", "Bunny"]

I have instantiated the class by:

class_name = class_string.constantize
obj = class_name.new

Then I just loop up through those arrays and set values to the attributes:

obj.attribute1 = value1

I get:

undefined method `attribute1=' for #<Foo:0x3326da8>

How do I set values for the attributes? TIA.

On 6/21/07, Gregory Brown <gregory.t.brown@gmail.com> wrote:
> On 6/21/07, Bala Paranj <bparanj@gmail.com> wrote:
>
> > When I run eval("obj.#{a} = #{value}"), I get the undefined method
> > 'a=' error message. Please help. TIA.
>
> Please do not use eval() unless you have a good reason to!  It's very
> dangerous if you're not careful.
>
> What you're looking for is:
>
> obj.send("#{a}=", value)
>
> Still, you're going to need to show more code for people to be able to
> help you.  Where is a being defined, what is obj?
>
>