DRY routing with form generated by Rails helper methods, shouldn't write routings directly in Javascript code.

The routing solution in Rails is pretty powerful, so we can modify routing easiliy. This facility may become cause of bugs. If we wanna submit data asynchronously with Javascript, then we have to write some routing paths in source of Javascript directly. It's not DRY and it doesn't work together with Rails routing solution. So we think example code which post a comment to the article. We have two