Ruby on rails: How to update the view with a new query - mysql

Question

I'm new at Ruby on Rails (I started studying this week by myself) and I'm facing some issues that I cannot solve.
I have created a project called 'projeto_ajuda' and i'm using mysql database. I access the aplication on http://localhost:3000/menu/index. It shows me a table with 5 columns, and the last one, is for a button.
What I want is: when the button is clicked, it calls a method from the controller that 'refresh' the table with a new select (i add a new condition in where statement).
Ps¹: the view show to filled rows in the table, but when I click on the button, nothing changes on the view, but the URL does: http://localhost:3000/menu/index.%23%3CMenu::ActiveRecord_Relation:0x007f5ce5891608%3E?id=6
Ps²: If I refresh_table(6) instead of refresh_table(nil) on the index method, it works just fine, selecting what I want from the database.
And if I look at the database, there is a record with the id 6.
menu_controller.rb:
class MenuController < ApplicationController
helper :all
def index
refresh_table(nil)
end
def abrir
refresh_table(params[:id])
end
private
def refresh_table(id)
if(id.nil?)
#menus = Menu.where("codigopai IS NULL")
else
#teste = Menu.find(id)
#menus = Menu.where("codigopai = '" + #teste.codigopai.to_s + #teste.codigo.to_s + "'")
end
end
end
index.html.erb:
<h1> List all </h1>
<table>
<tr>
<th>Codigo</th>
<th>CodigoPai</th>
<th>Descrição</th>
<th>Conteúdo</th>
<th></th>
</tr>
<% #menus.each do |m| %>
<tr>
<td><%= m.codigo %></td>
<td><%= m.codigopai %></td>
<td><%= m.descricao %></td>
<td><%= m.conteudo %></td>
<td><%= button_to 'Abrir', menu_index_path(#menus, :id => m.id), method: :post %></td>
</tr>
<% end %>
</table>
routes.rb:
Rails.application.routes.draw do
resources :menus
post 'menu/index'
get 'menu/index'
# For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
end

Answer 1

Try this
menu_controller.rb
class MenuController < ApplicationController
helper :all
def index
refresh_table(params[:id])
end
private
def refresh_table(id)
if id
#teste = Menu.find(id)
#menus = Menu.where(codigopai: "#{#teste.codigopai}#{#teste.codigo}")
else
#menus = Menu.where(codigopai: nil)
end
end
end
index.html.erb
<h1> List all </h1>
<table>
<tr>
<th>Codigo</th>
<th>CodigoPai</th>
<th>Descrição</th>
<th>Conteúdo</th>
<th></th>
</tr>
<% #menus.each do |m| %>
<tr>
<td><%= m.codigo %></td>
<td><%= m.codigopai %></td>
<td><%= m.descricao %></td>
<td><%= m.conteudo %></td>
<td><%= button_to 'Abrir', menu_index_path(id: m.id), method: :post %></td>
</tr>
<% end %>
</table>
I think you can read Query with Active Record and routing