gistfile1.md

こういうモデルで

ActiveRecord::Schema.define(version: 20130922022806) do

  create_table "models", force: true do |t|
    t.string   "field1"
    t.string   "field2"
    t.datetime "created_at"
    t.datetime "updated_at"
  end

end

field1だけの更新

$ curl -i -X'PUT' -H'Accept:application/json' -H'Content-Type:application/json; charset=utf-8' -d '{"model":{"field1":"c"}}' http://localhost:3000/models/1