Migrations: add_column supports custom column types. Closes #7742. First-patch cheers to jsgarvin\!

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6842 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Migrations: add_column supports custom column types.  #7742 [jsgarvin, Theory]
+
 * Load database adapters on demand. Eliminates config.connection_adapters and RAILS_CONNECTION_ADAPTERS. Add your lib directory to the $LOAD_PATH and put your custom adapter in lib/active_record/connection_adapters/adaptername_adapter.rb. This way you can provide custom adapters as plugins or gems without modifying Rails. [Jeremy Kemper]
 
 * Ensure that associations with :dependent => :delete_all respect :conditions option.  Closes #8034 [danger, joshpeek, Rick]

activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb

@@ -253,25 +253,28 @@ module ActiveRecord
 
 
       def type_to_sql(type, limit = nil, precision = nil, scale = nil) #:nodoc:
-        native = native_database_types[type]
-        column_type_sql = native.is_a?(Hash) ? native[:name] : native
-        if type == :decimal # ignore limit, use precison and scale
-          precision ||= native[:precision]
-          scale ||= native[:scale]
-          if precision
-            if scale
-              column_type_sql << "(#{precision},#{scale})"
+        if native = native_database_types[type]
+          column_type_sql = native.is_a?(Hash) ? native[:name] : native
+          if type == :decimal # ignore limit, use precison and scale
+            precision ||= native[:precision]
+            scale ||= native[:scale]
+            if precision
+              if scale
+                column_type_sql << "(#{precision},#{scale})"
+              else
+                column_type_sql << "(#{precision})"
+              end
             else
-              column_type_sql << "(#{precision})"
+              raise ArgumentError, "Error adding decimal column: precision cannot be empty if scale if specified" if scale
             end
+            column_type_sql
           else
-            raise ArgumentError, "Error adding decimal column: precision cannot be empty if scale if specified" if scale
+            limit ||= native[:limit]
+            column_type_sql << "(#{limit})" if limit
+            column_type_sql
           end
-          column_type_sql
         else
-          limit ||= native[:limit]
-          column_type_sql << "(#{limit})" if limit
-          column_type_sql
+          column_type_sql = type
         end
       end
 

activerecord/test/migration_test.rb

@@ -314,6 +314,20 @@ if ActiveRecord::Base.connection.supports_migrations?
       assert_kind_of BigDecimal, bob.wealth
     end
 
+    if current_adapter?(:MysqlAdapter)
+      def test_unabstracted_database_dependent_types
+        Person.delete_all
+
+        ActiveRecord::Migration.add_column :people, :intelligence_quotient, :tinyint
+        Person.create :intelligence_quotient => 300
+        jonnyg = Person.find(:first) 
+        assert_equal 127, jonnyg.intelligence_quotient
+        jonnyg.destroy
+      ensure
+        ActiveRecord::Migration.remove_column :people, :intelligece_quotient rescue nil
+      end
+    end
+
     def test_add_remove_single_field_using_string_arguments
       assert !Person.column_methods_hash.include?(:last_name)