The discard gem for rails has put a lot of thought into this and works pretty well, all things considered. It's not perfect, but I find using a library (either

The discard gem for rails has put a lot of thought into this and works pretty well, all things considered. It's not perfect, but I find using a library (either directly for inspiration) is often a shortcut to learning about a lot of edge cases from doing your own things. https://github.com/jhawthorn/discard https://github.com/jhawthorn/discard