Question

I have an application with Users, Machines, and Tests.
Users have many Machines and Tests
Machines belong to Users
Tests belong to Machines

*While on the Test Show page, I want to add a link to go to that Test’s parent Machine Show page. *

My TestsController reads:

  def show
@test = Test.find(params[:id])
...
end

My Test show page has the following link:

<%= link_to 'Back to Machine', machine_path(@machine) %>

For some reason the link is sending the user to

 /machines/test_id

instead of

/machines/machine_id  

I think I need something in the TestsController Show section like:

def show
@test = Test.find(params[:id])
@machine = Machine.find(params[:id])
...
end

but it must not be correct because I’m getting errors.

Answer 1

Try something like this

def show
  @test = Test.find(params[:id])
  @machine = @test.machine
  ...
end