Some votestuff

appcontrollerstweets_controller.rb

...
  def upvote
    @tweet = Tweet.find(params[:tweet_id])
    @tweet.goodvotes = @tweet.goodvotes + 1
    @tweet.save
    redirect_to :root
  end

  def downvote
    @tweet = Tweet.find(params[:tweet_id])
    @tweet.badvotes = @tweet.badvotes + 1
    @tweet.save
    redirect_to :root
  end
...

appviewstweetsshow.html.erb

<p>
  <b>Author:</b>
  <%= @tweet.author %>
</p>

<p>
  <b>Content:</b>
  <%= @tweet.content %>
</p>

<%= form_tag({:controller => "tweets", :action => "upvote"}, :method => "post") do %>
<%= hidden_field_tag :tweet_id, @tweet.id %>
<%= submit_tag("This is legitimate fact.") %>
<% end %>

<%= form_tag({:controller => "tweets", :action => "downvote"}, :method => "post") do %>
<%= hidden_field_tag :tweet_id, @tweet.id %>
<%= submit_tag("This is horse shit.") %>
<% end %>

<%= link_to 'Edit', edit_tweet_path(@tweet) %> |
<%= link_to 'Back', tweets_path %>

configroutes.rb

  match ':controller(/:action(/:id(.:format)))'