Don't ignore :precision and :scale when adding columns on postgresql. C…

…loses #6868 [w.piekutowski]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8647 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -587,13 +587,14 @@ def rename_table(name, new_name)
         execute "ALTER TABLE #{name} RENAME TO #{new_name}"
       end
 
-      # Adds a column to a table.
+      # Adds a new column to the named table.
+      # See TableDefinition#column for details of the options you can use.
       def add_column(table_name, column_name, type, options = {})
         default = options[:default]
         notnull = options[:null] == false
 
         # Add the column.
-        execute("ALTER TABLE #{quote_table_name(table_name)} ADD COLUMN #{quote_column_name(column_name)} #{type_to_sql(type, options[:limit])}")
+        execute("ALTER TABLE #{quote_table_name(table_name)} ADD COLUMN #{quoted_column_name} #{type_to_sql(type, options[:limit], options[:precision], options[:scale])}")
 
         change_column_default(table_name, column_name, default) if options_include_default?(options)
         change_column_null(table_name, column_name, false, default) if notnull

activerecord/test/migration_test.rb

@@ -268,6 +268,15 @@ def test_native_decimal_insert_manual_vs_automatic
       Person.reset_column_information
     end
 
+    def test_add_column_with_precision_and_scale
+      Person.connection.add_column 'people', 'wealth', :decimal, :precision => 9, :scale => 7
+      Person.reset_column_information
+
+      wealth_column = Person.columns_hash['wealth']
+      assert_equal 9, wealth_column.precision
+      assert_equal 7, wealth_column.scale
+    end
+
     def test_native_types
       Person.delete_all
       Person.connection.add_column "people", "last_name", :string