Updating readme and creating exceptions file

README.markdown

@@ -447,13 +447,13 @@ If `String` the text given is evaluated at the current instance (using `instance
 If `Symbol` a method with the same name as the symbol is called at the current instance, as in:
 
 ```ruby
-    mapping do 
-     indexes :id, :as => :some_other_id
+    mapping do
+      indexes :category, :as => :category_name
+    end
+
+    def category_name
+      self.category.name
     end
-
-    def some_other_id
-      self.component.id
-    end    
 ```
 
 If `Proc`, the proc is evaluated against the current instance (using `instance_eval`), as in:

lib/tire.rb

@@ -11,6 +11,7 @@
 # Ruby 1.8 compatibility
 require 'tire/rubyext/ruby_1_8' if defined?(RUBY_VERSION) && RUBY_VERSION < '1.9'
 
+require 'tire/errors'
 require 'tire/rubyext/hash'
 require 'tire/rubyext/symbol'
 require 'tire/utils'

lib/tire/invalid_as_option_exception.rb → lib/tire/errors.rb

@@ -2,8 +2,8 @@ module Tire
   class InvalidAsOptionException < Exception
 
     def initialize( value )
-      super("Unknown type for :as field, accepted types are `Symbol`, `String` and `Proc`s - #{value.class.name} - #{value.inspect}")
+      super("Unknown type for :as field, accepted types are `Symbol`, `String`, `lambda`s and `Proc`s - #{value.class.name} - #{value.inspect}")
     end
 
   end
-end
+end

lib/tire/model/search.rb

@@ -1,5 +1,3 @@
-require 'tire/invalid_as_option_exception'
-
 module Tire
   module Model
 

test/models/active_record_models.rb

@@ -116,7 +116,7 @@ class ActiveRecordNewsStory < ActiveRecord::Base
 
   tire do
     mapping do
-      indexes :id, :index => :not_analysed
+      indexes :id
       indexes :title
       indexes :content
       indexes :author_name, :as => :author_name