rails - converting an object to an array

Question

Hey, I am trying to convert this object to an array of ints e.g. array(3,4,6)

- - !ruby/object:Code 
attributes: 
  candidate_id: "3"
attributes_cache: {}

- !ruby/object:Code 
attributes: 
  candidate_id: "4"
attributes_cache: {}

- !ruby/object:Code 
attributes: 
  candidate_id: "6"
attributes_cache: {}

here is what I tried

result = @intersection.map{|c| c.candidate_id}

Thanks

I get - undefined method `candidate_id' for [#<Code >, #<Code >, #<Code >]:Array — Alex
– Alex, Commented Jul 20, 2010 at 16:13
Can you give us the result of @intersection.inspect , please? I suspect it is an array of arrays of Code objects, actually. — giraff
– giraff, Commented Jul 20, 2010 at 18:39
Thanks for the reply! --- "[[#<Code >, #<Code >, #<Code >]]" — Alex
– Alex, Commented Jul 20, 2010 at 18:45
Looks like it's an array of array. Try @intersection.first.map... — Grnbeagle
– Grnbeagle, Commented Jul 20, 2010 at 20:25

Maz · Accepted Answer · 2010-07-20 16:37:25Z

1

Try the following:

c[:candidate_id]

OR

c[:attributes][:candidate_id]

I'm not familiar with YAML, however you might want to try making hashes instead of Code objects. Additionally, if you do use a code class, you should ensure that you have and attr_accessor (and then your old code should work).

edited Jul 20, 2010 at 16:37

answered Jul 20, 2010 at 16:07

Maz

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3 Comments

Alex Over a year ago

I get a - undefined method `attributes' for [#<Code >, #<Code >, #<Code >]:Array

Alex Over a year ago

using c[:candidate_id] with a attr_accesser I get a type error (Symbol as array index)

Maz Over a year ago

you do c.candidate_id with attr_accessor

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