Using parse_caller to support proper parse the file name in mingw pla…

…tform.

credit from https://gist.github.com/mikezter/540132

lib/active_model/serializer.rb

@@ -28,7 +28,7 @@ def self.inherited(base)
       base._attributes_keys = self._attributes_keys.try(:dup) || {}
       base._associations = self._associations.try(:dup) || {}
       base._urls = []
-      serializer_file = File.open(caller.first[/^[^:]+/])
+      serializer_file = File.open(parse_caller(caller.first).first)
       base._cache_digest = Digest::MD5.hexdigest(serializer_file.read)
     end
 
@@ -256,5 +256,13 @@ def self.get_serializer_for(klass)
       end
     end
 
+    def self.parse_caller(at)
+      if /^(.+?):(\d+)(?::in `(.*)')?/ =~ at
+        file = Regexp.last_match[1]
+        line = Regexp.last_match[2].to_i
+        method = Regexp.last_match[3]
+        [file, line, method]
+      end
+    end
   end
 end