lib/lookup_by/cache.rb in lookup_by-0.8.0 vs lib/lookup_by/cache.rb in lookup_by-0.9.0

@@ -31,11 +31,11 @@
       when ::Integer
         raise ArgumentError, "`#{@klass}.lookup_by :#{@field}` options[:find] must be true when caching N" if @read == false
 
         @type    = :lru
         @limit   = options[:cache]
-        @cache   = Rails.configuration.allow_concurrency ? Caching::SafeLRU.new(@limit) : Caching::LRU.new(@limit)
+        @cache   = concurrent? ? Caching::SafeLRU.new(@limit) : Caching::LRU.new(@limit)
         @read    = true
         @write ||= false
         @testing = true if Rails.env.test? && @write
       else
         @read    = true
@@ -128,9 +128,18 @@
       @enabled = false
       clear
     end
 
   private
+
+    def concurrent?
+      case Rails::VERSION::MAJOR
+      when 4 then Rails.configuration.cache_classes && Rails.configuration.eager_load
+      when 3 then Rails.configuration.allow_concurrency
+      else
+        true
+      end
+    end
 
     def primary_key?(value)
       case @primary_key_type
       when :integer
         value.is_a? Integer