No Method Error in Lists#Show - ruby-on-rails

Question

So I've done some research on Stack Overflow and tried a variety of solutions but nothing seems to be working. I'm trying to render my ListsController show page, but I keep getting the error : undefined method `name' for nil:NilClass. When I use the rails console, my params are passing the ID through, and I can call #list = List.find(params[:id] and then #list.name. However, I keep getting the same error message. My controller looks like this:
class ListsController < ApplicationController
def index
#lists = List.order("created_at DESC")
#list = List.new
end
def create
#list = List.new(list_params)
if #list.save
if request.xhr?
# somehow only send back the html for the page update
render :layout => false
else
redirect_to root_path
end
else
#lists = List.all
render :index
end
def show
#list = List.find(params[:id])
end
end
private
def list_params
params.require(:list).permit(:name)
end
end
My view currently looks like this:
<section class="todoapp">
<header class="header">
<h1><%= #list.name %></h1>
</header>
<section class="main">
<input class="toggle-all" type="checkbox">
<label for="toggle-all">Mark all as complete</label>
<ul class="todo-list">
<%= render #list.items %>
<!-- exactly the same as: -->
<%#= render :collection => #list.items, :partial => "items/item" %>
</ul>
</section>
</section>
I've tried using the line <%= #list.name if #list.name %> but that doesn't seem to be ruling out the event of nil class either (even though params currently have an ID).

Answer 1

class ListsController < ApplicationController
def index
#lists = List.order("created_at DESC")
#list = List.new
end
def create
#list = List.new(list_params)
if #list.save
if request.xhr?
# somehow only send back the html for the page update
render :layout => false
else
redirect_to root_path
end
else
#lists = List.all
render :index
end
end
def show
#list = List.find(params[:id])
end
private
def list_params
params.require(:list).permit(:name)
end
end