rack hack for rack params bug

config/initializers/_rack_hack.rb

@@ -0,0 +1,3 @@
+# http://thewebfellas.com/blog/2010/7/15/rails-2-3-8-rack-1-1-and-the-curious-case-of-the-missing-quotes
+raise "rack hack not needed anymore?" unless RAILS_GEM_VERSION == '2.3.10'
+Dir[File.join(Rails.root, "lib", "patches", "**", "*.rb")].sort.each { |patch| require(patch) }

lib/patches/rack.rb

@@ -0,0 +1,55 @@
+module Rack
+  module Utils
+    def parse_query(qs, d = nil)
+      params = {}
+
+      (qs || '').split(d ? /[#{d}] */n : DEFAULT_SEP).each do |p|
+        k, v = p.split('=', 2).map { |x| unescape(x) }
+        if cur = params[k]
+          if cur.class == Array
+            params[k] << v
+          else
+            params[k] = [cur, v]
+          end
+        else
+          params[k] = v
+        end
+      end
+
+      return params
+    end
+    module_function :parse_query
+
+    def normalize_params(params, name, v = nil)
+      name =~ %r(\A[\[\]]*([^\[\]]+)\]*)
+      k = $1 || ''
+      after = $' || ''
+
+      return if k.empty?
+
+      if after == ""
+        params[k] = v
+      elsif after == "[]"
+        params[k] ||= []
+        raise TypeError, "expected Array (got #{params[k].class.name}) for param `#{k}'" unless params[k].is_a?(Array)
+        params[k] << v
+      elsif after =~ %r(^\[\]\[([^\[\]]+)\]$) || after =~ %r(^\[\](.+)$)
+        child_key = $1
+        params[k] ||= []
+        raise TypeError, "expected Array (got #{params[k].class.name}) for param `#{k}'" unless params[k].is_a?(Array)
+        if params[k].last.is_a?(Hash) && !params[k].last.key?(child_key)
+          normalize_params(params[k].last, child_key, v)
+        else
+          params[k] << normalize_params({}, child_key, v)
+        end
+      else
+        params[k] ||= {}
+        raise TypeError, "expected Hash (got #{params[k].class.name}) for param `#{k}'" unless params[k].is_a?(Hash)
+        params[k] = normalize_params(params[k], after, v)
+      end
+
+      return params
+    end
+    module_function :normalize_params
+  end
+end