update_attributes with none-standard form

I have cobbled together a form due to some oddities in my code and routes. Things work for adding data to the database, but I can't quite seem to figure out how to update data. Here is some code.

new.html.erb

<% form_tag '/list' do %>
    Episodes Completed: 
    <%= text_field_tag "completed"  %>
    Watch Status
    <%= collection_select(nil, 'id', @show_status, :id, :state) %>
    <%= hidden_field_tag('show_id', @show.id) %>
    <%= submit_tag 'Add' %>
<% end %>

edit.html.erb

<% form_tag("/list/#{@show_completion.show.id}", :method => :put ) do %>
    Episodes Completed: 
    <%= text_field_tag "completed", @show_completion.episodes_completed  %>
    Watch Status
    <%= collection_select(nil, 'id', @show_status, :id, :state) %>
    <%= hidden_field_tag('show_id', @show_completion.show.id) %>
    <%= submit_tag 'Edit' %>
<% end %>

Here is the controller's Create and Update methods

def create
  @show_completetion = ShowCompletionStatus.new
  @show_completetion.user_id = current_user.id
  @show_completetion.episodes_completed = params[:completed]
  @show_completetion.status_state_id = params[:id]
  @show_completetion.show_id = params[:show_id]
  @show_completetion.save
end

def update
  @show_completion = ShowCompletionStatus.find(params[:id])

  @show_completion.episodes_completed = params[:completed]
  @show_completion.status_state_id = params[:id]
  @show_completion.show_id = params[:show_id]

  if @show_completion.update_attribute('episodes_completed', params[:completed])
    redirect_to "/list/#{current_user.username}"
  else
     redirect_to "/list/#{params[:id]}/edit"
  end
end

Here are my routes for these:

match "list/" => "list#create", :via => :post
match "list/new/:show_id" => "list#new", :constraints => { :s开发者_如何学JAVAhow_id => /[0-9]+/ }
match "list/:id/edit" => "list#edit", :constraints => { :id => /[0-9]+/ }, :via => :get
match "list/:id" => "list#update", :constraints => { :id => /[0-9]+/ }, :via => :put

I have been trying different things to get this to work for the better part of 4 hours now. I think I am just missing something, but I just can't see it.

Is there a better way to do the form that makes it work better?

Any help is appreciated.

I solved this issue by making a hash and passing it to the update attributes with the key value pairs of what the objects attributes would be. Since updates_attributes takes a hash and not an object it was a simple solution once the connection was made.

Try to replace your update_attribute call for a save call.

Also, if you're writing everything from scratch instead of using the builtins, try to use save! instead of save: it will raise an exception if it fails, unlike the plain save that just returns false.