Adding a drop down in rails and do particular action - ruby-on-rails

Question

I am new to rails and this might me be a basic question. I checked on the internet but not able to find a simple example(might be my search is bad).
I need to create a form in my view and based the value selected and button clicking action i need to execute a particular action in my controller. I am able to create a drop down in my view using following lines.
= form_tag("/rtes", method: "get") do
= label_tag(:q, "Get Trip Type:")
= select_tag(:q, options_for_select({ "a" => "r4d_001", "b" => "r4d_002" })
<br>
= button_to( "Get Trip", :action => "rtes", :controller =>:q)
where rtes is my controller and i have mapped the value of the drop down values to the corresponding action names that needs to be executed when the button is clicked. This is my controller.
class RtesController < ApplicationController
##client=OptimusRtesServiceModel.new
def index
end
def r4d_001
result = ##client.r4t_001()
#driver_username = result.trip.loads[0].driver_details[0].driver_user_name
#driver_password = result.trip.loads[0].driver_details[0].driver_password
#trip_id = result.trip.trip_id
#carrier_username = result.carrier_details.carrier_user_name
#carrier_password = result.carrier_details.carrier_password
end
def r4d_002
result = ##client.r4t_002()
#driver_username = result.trip.loads[0].driver_details[0].driver_user_name
#driver_password = result.trip.loads[0].driver_details[0].driver_password
#trip_id = result.trip.trip_id
#carrier_username = result.carrier_details.carrier_user_name
#carrier_password = result.carrier_details.carrier_password
end
end
Now, if the first option in the drop down is selected and the button is clicked the "r4d_001" action in the controller needs to be executed. Your help is highly appreciated.

Answer 1

Rails is not like angular that you are trying to use :q variable to pass the value of selection to the button. You can create a drop-down menu instead of using select field to send them to different action for different option. Still if you want to use select field, then you need javascript to handle the front-end task here.

Answer 2

I have slightly modified my code to made it work. The idea is to get use the rails params and execute the corresponding action in my controller using case/when.
My view code:
= form_tag({:controller=>"r4d", :action=>"result"}, method: :get) do
= label_tag(:q, "Trip Type: ")
= select_tag(:q, options_for_select({"a" => "1", "b" => "2"})
= submit_tag("GetDetails")
My Contoller code:
class R4dController < ApplicationController
##client=ServiceModel.new
def r4d_result
result = case params[:q]
when "1"
##client.1
when "2"
##client.2
end
#value = result.value
end
end
By this way, i am able to pass the selected value of the drop down and execute the corresponding thing.