Ruby: Dynamically calling available methods raising undefined method (metaprogramming)
Posted
by user94154
on Stack Overflow
See other posts from Stack Overflow
or by user94154
Published on 2010-04-21T23:29:48Z
Indexed on
2010/04/21
23:33 UTC
Read the original article
Hit count: 292
I have an Activerecord object called Foo:
Foo.attribute_names.each do |attribute|
puts Foo.find(:all)[0].method(attribute.to_sym).call
end
Here I'm calling all attributes on this model (ie, querying for each column value). However, sometimes, I'll get an undefined method error.
How can ActiveRecord::Base#attribute_names return an attribute name that when converted into its own method call, raises an undefined method error?
Thank
© Stack Overflow or respective owner
