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Ruby Building Web Apps with Sinatra Updating Data Submitting the Edit Form Via PUT Request

8,027 Points

Whats going wrong there? Task 5/6

Hello, please can someone explain me why i've got an error where i didn't edit something? Invalid conversion...

<p>Please enter your name below.</p>

<form method="post" action="/signatures/<%=@index%>">
  <input type="hidden" name="_method" value="put">
  <input type="text" name="signature" value="<%= @signature %>">
  <input type="submit">
require "sinatra"

def load_signature(index)
  # Code omitted for brevity

# Updates the line at the given index and re-saves the file.
def update_signature(index, signature)
  lines = File.readlines("signatures.txt")
  index = index.to_i
  lines[index] = signature
  File.open("signatures.txt", "w") do |file|
    file.puts lines

get "/:index/edit" do
  # Code omitted for brevity

get "/signatures/new" do
  # Code omitted for brevity

put "/signatures/:index" do
  update_signature(:index, params['signature'])

1 Answer

Jay McGavren
Jay McGavren
Treehouse Teacher

The update_signature method is expecting a string containing a number (like "1"), but instead it's getting a symbol. So the problem is actually in the put "/signatures/:index" route, where update_signature is called. You need to use the :index symbol to get a value from params hash, then pass that value to update_signature. But instead, the :index symbol is getting passed to update_signature directly.