Unable to pass param on clicking button in rails - ruby-on-rails

Question

I have a controller models_controller.rb as following:
class ModelsController < ApplicationController
def list
#models=["A","E","M","I"]
end
def get_config
Rails.logger.info(params[:model_id])
//some logic based on params[:model_id] value
end
end
The corresponding list.html.erb is as follows:
<table>
<thead>
<tr>
<th>Model</th>
<th></th>
</tr>
</thead>
<tbody>
<% #models.each_with_index do |model, index| %>
<tr>
<td><%= model %></td>
<td><%= button_to "view", {:controller => :models, :action => :get_config, :model_id => index }, :method => :get %></td>
</tr>
<% end %>
</tbody>
</table>
Each row of this table has a button, where upon clicking, I am passing the index of the element. But I am not been able to access it in the get_config method. Logger is printing an empty string. routes.rb is as follows:
DemoApp::Application.routes.draw do
get "models/list"
get "models/get_config"
get "models/list/:model_id" => "models#get_config"
end
What am I doing wrong? I am not able to figure that out.

Answer 1

Rails routes are matched in the order they are specified. So get "models/get_config" is catching the request before get "models/list/:model_id" => "models#get_config". Try changing the order to this:
DemoApp::Application.routes.draw do
get "models/list"
get "models/list/:model_id" => "models#get_config"
get "models/get_config"
end