{"version":"1.0","type":"rich","title":"Reform multiparameter date issue","description":"A Rails form demonstrates how Reform’s `multi_params: true` option on a `birthdate` property automatically splits a single date input into separate year, month, and day parameters for validation. The `new.html.erb` template uses SimpleForm’s `f.input :birthdate, as: :date` to render the date fields, while `UserForm` declares the typed `Date` property. The `UsersController` instantiates the form with a `User` model, validates submitted params, and saves on success, showing the seamless handoff between HTML form, Reform validation, and ActiveRecord persistence.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-2fb94722c9f0a4e5ab06?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}