SQLite: rename_column raises if the column doesn't exist.

[#622 state:resolved]

activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb

@@ -260,6 +260,9 @@ def change_column(table_name, column_name, type, options = {}) #:nodoc:
       end
 
       def rename_column(table_name, column_name, new_column_name) #:nodoc:
+        unless columns(table_name).detect{|c| c.name == column_name.to_s }
+          raise ActiveRecord::ActiveRecordError, "Missing column #{table_name}.#{column_name}"
+        end
         alter_table(table_name, :rename => {column_name.to_s => new_column_name.to_s})
       end