I want to see a full roundtrip: 1. define input fields in html template of choice 2. validate form/struct/whatever and prepare errror messages per field 3. r

I want to see a full roundtrip: 1. define input fields in html template of choice 2. validate form/struct/whatever and prepare errror messages per field 3. redisplay html with field-level errors to let user correct its input step 3. is the interesting and missing in most examples of newer webframeworks