Ruby on Rails - Edit not working - ruby-on-rails

Question

Trying to update a post that I've made in my Ruby on Rails project but nothing happens. It is really annoying since I don't get any errors and can't seem to figure out what I am doing wrong.
I think it worked before, but since I first wrote the different actions I've added multiple things to my "feed"-model, such as impressions and tags. Don't know if this has affected my update action...
My controller looks like this:
def edit
#feed = Feed.find(params[:id])
end
def update
#feed = Feed.find(params[:id])
respond_to do |format|
if #feed.update_attributes(params[:feed])
format.html { redirect_to #feed, notice: 'Feed was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: "edit" }
format.json { render json: #feed.errors, status: :unprocessable_entity }
end
end
end
My feed model looks like this:
attr_accessible :content, :tag_list, :guid, :language, :location, :published_at, :summary, :url, :title, :user_id, :thumbnail_url, :url_to_feed, :type_of_feed
has_many :impressions, :as=>:impressionable
validates_length_of :tag_list, :maximum => 10
acts_as_taggable
My view looks like this:
<h1>Editing feed</h1>
<%= render 'form' %>
<%= link_to 'Show', #feed %> |
<%= link_to 'Back', feeds_path %>
____________________ form
<%= form_for(#feed) do |f| %>
<% if #feed.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#feed.errors.count, "error") %> prohibited this feed from being saved:</h2>
<ul>
<% #feed.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :title %><br />
<%= f.text_field :title %>
</div>
<div class="field">
<%= f.label :content %><br />
<%= f.text_area :content %>
</div>
<div class="field">
<%= f.label :location %><br />
<%= f.text_field :location %>
</div>
<div class="field">
<%= f.label :language %><br />
<%= f.text_field :language %>
</div>
<div class="field">
<%= f.label :tag_list, "Tags (seperated by spaces)" %><br />
<%= f.text_field :tag_list %>
</div>
<div class="actions">
<%= f.submit %>
</div>

Answer 1

The log entry
Started PUT "/feeds/1" for 127.0.0.1 at 2013-02-17 12:27:36 +0100 Processing by FeedsController#show as HTML
says,that the PUT request (sending your form data) is being processed by FeedsController#show, but it has to be processed by FeedsController#update. So your routes seem to be wrong. Check out the Rails Routing Guide.
I would use a feeds ressource, because it creates the correct routes automatically:
resources :feeds