Question

I’m currently using the following gems in my application to provide pagination, search, linkable tags, and a tag cloud.

gem ‘will_paginate’, ‘~> 3.0.2’
gem ‘acts-as-taggable-on’, ‘~>2.1.0’

I have everything implemented so far in Rails 3.1 except the tag links. I have them displayed below every post and in the tag cloud and both link to different views and neither works.

A link in the tag cloud (Test1) links me to: /posts/tag?id=Test1 which gives me an error “Couldn’t find Post with id=tag”

And a link in the post redirects me to /posts?tag=Test2&view=tag which doesn’t change anything. All my posts are still displayed.

Here’s what I’ve changed so far to try and implement this:

The edited part of my routes.rb:

resources :posts do
collection do
  get :tag
end

end

My post.rb:

acts_as_taggable_on :tags
def self.tag_post_list(page, tag)

  Post.tagged_with(tag).by_date.paginate(:page => params[page], :per_page => 20)

end

Post_Controller.rb:

def index
  @posts = Post.search(params[:search], params[:page])
  @tags = Post.tag_counts_on(:tags)
  if request.xhr?
    render :partial => @posts
  end
end
def tag
  @posts = Post.tagged_with(params[:id])
  @tags = Post.tag_counts_on(:tags)
  render :action => 'index'
end
def show
  @post = Post.find(params[:id])
  @tags = Post.tag_counts_on(:tags)

  respond_to do |format|
    format.html # show.html.erb
    format.json { render json: @post }
  end
end

Posts_helper.rb:

include ActsAsTaggableOn::TagsHelper

Tag cloud in application.html.erb

<% tag_cloud(@tags, %w(css1 css2 css3 css4)) do |tag, css_class| %>
<%= link_to tag.name, { :action => :tag, :id => tag.name }, :class => css_class %>
<% end %>

Tag cloud definition in application_controller.rb

def tag_cloud
  @tags = Post.tag_counts_on(:tags)
end

Links in my posts:

<% for tag in post.tags %>
<%= link_to tag.name, posts_path(:view =>'tag', :tag => tag.name) %>
<% end %>

The error in my console:

Started GET "/posts/tag?id=Test1" for 127.0.0.1 at 2011-11-05 00:35:00 -0700
Processing by PostsController#show as HTML
Parameters: {"id"=>"tag"}
Post Load (0.0ms)  SELECT "posts".* FROM "posts" WHERE "posts"."id" = $1 LIMIT 1  [["id", "tag"]]
Completed 404 Not Found in 3ms

ActiveRecord::RecordNotFound (Couldn't find Post with id=tag): app/controllers/posts_controller.rb:33:in `show'

I’ve searched the internet for the past 5 hours trying to figure this out, but nothing is up to date or entirely relevant.

I get that it is passing “tag” to the show action, but how do I get it to pass the relevant ID and anything else I need to show the correct posts with that tag?

Answer 1

Stupid mistake:

I wasn’t passing paginate to the @posts array in the tag definition.

@posts = Post.tagged_with(params[:id]).paginate(:page => params[:page], :per_page => 10)

Work’s perfectly. Thanks for the help, you were part of the solution.