Replace Hash#compact with #reject for Rails < 4.1
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@ -99,7 +99,7 @@ module Ransack
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:attr_fallback_name => attr_fallback_name(associated_class),
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:association_name => association_name
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}
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.compact
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.reject! { |_, value| value.nil? }
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end
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def self.attr_fallback_name(associated_class)
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