Ticket #3735: add_primary_key.diff

lib/active_record/connection_adapters/abstract/schema_statements.rb

@@ -195 +195 @@
-
-        execute "CREATE #{index_type} INDEX #{index_name} ON #{table_name} (#{Array(column_name).join(", ")})"
-      end
+      
+      # Adds a primary key to a table.  The column name defaults to 'id'.  
+      # Only supports integer primary keys, use +execute+ for legacy schema 
+      # support 
+      # ===== Example
+      #   add_primary_key(:projects_developers)
+      #   add_primary_key(:accounts, :acctno)
+      def add_primary_key(table_name, column_name='id')
+        execute "ALTER TABLE #{table_name} ADD #{column_name} #{native_database_types[:primary_key]}"
+      end
+      
-
-      # Remove the given index from the table.
-      #