fields_for (ActionView::Helpers::FormHelper) - APIdock

fields_for(record_name, record_object = nil, options = {}, &block) public Creates a scope around a specific model object like form_for, but doesn’t create the form tags themselves. This makes fields_for suitable for specifying additional model objects in the same form. Although the usage and purpose of fields_for is similar to form_for's, its method signature is slightly different. Like form_for,

[daaaaaai]

知らない機能なんこかあった、、けれど、APIモード時代だともうあまり注意を払っている人少ないかな・・・

[azihsoyn]

“person_form.fields_for”