Still having problems with ActiveRecord

[masnick]

Unfortunately the problem I was having before still isn't solved...here's the error I'm getting now: /Library/Ruby/Gems/1.8/gems/classifier-1.3.3/lib/classifier/extensions/vector.rb:16:insum': undefined method to_f' for []:Array (NoMethodError)

[fidel]

I have the same problem. I'm trying to fix this, so if I succed, I'll give you to know.

[XurdeFdez]

Unpack the gem in your vendor directory (gem unpack classifier) and rewrite the sum method in lib/classifier/extensions/vector.rb like this:

def sum(identity = 0, &block)
 return identity unless size > 0

 if block_given?
   map(&block).sum
 else
   a = inject( nil ) { |sum,x| sum ? sum+x : x }
   #Hack to remove the to_f error
   a.is_a?(Array) ? a : a.to_f
 end
end

[argusinsights]

That worked! Thanks! Any chance of cardmagic rolling this into the main branch?

[Rustin]

Running into the same problem. Using rails 3 I can't unpack the gem as I was used to doing in rails 2. When I fork Classifier here on github I end up with a slew of other errors on bundle install.

I'd love to hear if cardmagic might roll a fix for this issue into the main branch. Any chance?

[wuyuntao]

Add a monkey patch to config/initializers/classifier_hack.rb if you are using rails3

class Array
  def sum(identity = 0, &block)
    return identity unless size > 0

    if block_given?
      map(&block).sum
    else
      a = inject( nil ) { |sum,x| sum ? sum+x : x }
      # Hack to remove the to_f error
      a.is_a?(Array) ? a : a.to_f
    end
  end
end

[cardmagic]

Fixed in version 1.4.0 and above