Adding support to use custom parsers.

lib/i18n_alchemy.rb

@@ -21,12 +21,20 @@ def localized(attributes=nil, *args)
       class_attribute :localized_methods,
         :instance_reader => false, :instance_writer => false
       self.localized_methods = {}
+
+      class_attribute :customized_parsers,
+        :instance_reader => false, :instance_writer => false
+      self.customized_parsers = {}
     end
 
     module ClassMethods
       def localize_methods(methods_hash)
         self.localized_methods = self.localized_methods.merge(methods_hash)
       end
+
+      def custom_parsers(parsers_hash)
+        self.customized_parsers = self.customized_parsers.merge(parsers_hash)
+      end
     end
   end
 end

lib/i18n_alchemy/proxy.rb

@@ -54,7 +54,7 @@ def build_attributes
         @target.class.columns.each do |column|
           next if column.primary || column.name.ends_with?("_id")
 
-          parser = detect_parser_from_column(column)
+          parser = @target.class.customized_parsers[column.name.to_sym] || detect_parser_from_column(column)
           build_attribute(column.name, parser)
         end
       end

test/custom_parsers/my_custom_date_parser.rb

@@ -0,0 +1,14 @@
+module MyCustomDateParser
+  include I18n::Alchemy::DateParser
+  extend self
+
+  def localize(value)
+    I18n.localize value, :format => :custom
+  end
+
+  protected
+
+  def i18n_format
+    I18n.t(:custom, :scope => [:date, :formats])
+  end
+end

test/db/test_schema.rb

@@ -11,6 +11,7 @@
     t.decimal    :price
     t.integer    :quantity
     t.date       :released_at
+    t.date       :released_month
     t.datetime   :updated_at
     t.timestamp  :last_sale_at
     t.references :supplier

test/i18n_alchemy/proxy_test.rb

@@ -116,6 +116,21 @@ def test_localizes_date_attribute_before_type_cast_output
     assert_equal "28/02/2011", @localized.released_at_before_type_cast
   end
 
+  def test_parses_date_attribute_input_with_custom_parser
+    @localized.released_month = "02/2011"
+    assert_equal Date.new(2011, 2, 1), @product.released_month
+  end
+
+  def test_localizes_date_attribute_output_with_custom_parser
+    @product.released_month = Date.new(2011, 2, 1)
+    assert_equal "02/2011", @localized.released_month
+  end
+
+  def test_localizes_date_attribute_before_type_cast_output_with_custom_parser
+    @product.released_month = Date.new(2011, 2, 1)
+    assert_equal "02/2011", @localized.released_month_before_type_cast
+  end
+
   # DateTime
   def test_parses_datetime_attribute_input
     @localized.updated_at = "28/02/2011 13:25:30"

test/locale/en.yml

@@ -3,6 +3,7 @@ en:
   date:
     formats:
       default: "%m/%d/%Y"
+      custom: "%m/%Y"
 
   time:
     formats:

test/locale/pt.yml

@@ -3,6 +3,7 @@ pt:
   date:
     formats:
       default: "%d/%m/%Y"
+      custom: "%m/%Y"
 
   time:
     formats:

test/models/product.rb

@@ -2,6 +2,7 @@ class Product < ActiveRecord::Base
   include I18n::Alchemy
   localize_methods :total => :number, :estimated_delivery_at => :date,
     :estimated_last_comission_payment_at => :timestamp
+  custom_parsers :released_month => MyCustomDateParser
 
   attr_protected :my_precious
 

test/test_helper.rb

@@ -15,6 +15,7 @@
 I18n.load_path << Dir[File.expand_path("../locale/*.yml", __FILE__)]
 
 require "db/test_schema"
+Dir["test/custom_parsers/*.rb"].each { |file| require File.expand_path(file) }
 Dir["test/models/*.rb"].each { |file| require File.expand_path(file) }
 
 module I18n::Alchemy