How to find a filter (input-search) for Rails?

Question

css

In php, you can immediately connect bootstrap.widgets.TbGridView, and there are already ready-made filters for table fields, but what is there in Rails?

Answer 1

input {
  background: none;
  border: 1px solid rgba(255,255,255,.5);
}

Answer 2

A normal controller method that queries the model. If the logic is complex, then add another method to the model.
It is not necessary to use widgets in rails for such a task.