This demo site is a POC in addition to the blog post: https://blog.romainnorberg.be/post/store-properties-in-json-format-and-use-propertyaccess-to-read
The database is reset every 10 minutes
Demo url: https://blog-form-propertypath.herokuapp.com/ (hosted on Heroku free plan, so be patient)
Using symfony CLI: symfony server:start
bin/console doctrine:fixtures:load