Include the table name in the with_x_translation

This is to prevent a possible ambiguous column error when the model is joined
with another model having the same translated column name.

Author: louim

lib/json_translate/translates.rb

@@ -39,7 +39,7 @@ def translates(*attrs)
         end
 
         define_singleton_method "with_#{attr_name}_translation" do |value, locale = I18n.locale|
-          quoted_translation_store = connection.quote_column_name("#{attr_name}#{SUFFIX}")
+          quoted_translation_store = connection.quote_table_name("#{self.table_name}.#{attr_name}#{SUFFIX}")
           translation_hash = { "#{locale}" => value }
 
           if MYSQL_ADAPTERS.include?(connection.adapter_name)

test/test_helper.rb

@@ -7,7 +7,15 @@
 I18n.available_locales = [:en, :fr]
 
 class Post < ActiveRecord::Base
+  has_many :tags
   translates :title, :body_1
+
+  scope :tagged, -> (tag_title) { joins(:tags).merge(Tag.with_title_translation(tag_title)) }
+end
+
+class Tag < ActiveRecord::Base
+  belongs_to :post
+  translates :title
 end
 
 class PostDetailed < Post
@@ -53,6 +61,10 @@ def create_table
         t.column :body_1_translations, column_type
         t.column :comment_translations, column_type
       end
+      connection.create_table(:tags, :force => true) do |t|
+        t.column :title_translations, column_type
+        t.column :post_id, :integer
+      end
     end
   end
 

test/translates_test.rb

@@ -206,6 +206,14 @@ def test_with_translation_relation
     end
   end
 
+  def test_with_translation_when_ambiguous_column
+    p = Post.create!(:title_translations => { "en" => "Alice in Wonderland", "fr" => "Alice au pays des merveilles" })
+    Tag.create!(:title_translations => { "en" => "A Tag", "fr" => "Un tag" }, post: p)
+    I18n.with_locale(:en) do
+      assert_equal p.title_en, Post.tagged("A Tag").first.try(:title)
+    end
+  end
+
   def test_with_interpolation_arguments
     p = Post.create!(:title_translations => { "en" => "Alice in %{where}" })
     I18n.with_locale(:en) do