rails_autolink gem for my comments issues - ruby-on-rails

Question

I can't seem to implement this option: On my app, users can create posts and comment on posts as well. If a user wants to show a URL in either the www format or http format, how should I display that using the rails_autolink gem? I want the url to be clickable and take you to the link. I have already installed the gem and I added it to my posts controller. Another user suggested that gem to me but I do not understand how to implement it. Users create comments from the posts show template. Does the gem need to be used in the show template or the posts_controller?
this is my post show.html.erb:
<div class="page-header">
<h2>
<%= #post.title %>
<small>
posted by <%= link_to #post.creator.username %> <%= time_ago_in_words(#post.created_at) + ' ago' %>
| <%= link_to 'go to link', fix_url(#post.url) %>
<% if logged_in? && (#post.creator == current_user) %> |
<%= link_to 'edit', edit_post_path(#post) %> |
<i class="icon-user icon"></i>
<% end %>
</small>
</h2>
</div>
<h3><%= #post.description %></h3>
<%= render 'shared_partials/errors', errors_obj: #comment %>
<%= form_for [#post, #comment] do |f| %>
<%= f.text_area :body, :class=> "span4", :placeholder=> "Comment goes here", :rows => "7" %>
</br>
<div class="button">
<%= f.submit "Create a comment", class: 'btn btn-primary' %>
</div>
<% end %>
<div class="page-header">
<h4>All Comments</h4>
</div>
<% #post.newest_comments.each do |comment| %>
<div class="comments">
<h5><%= comment.body %></h5>
<li>
<small class="muted">
posted by <%= link_to comment.creator.username %> <%= time_ago_in_words(comment.created_at) + ' ago' %>
<% if logged_in? && (comment.creator == current_user) %> |
<%= link_to 'edit', edit_post_comment_path(#post, comment) %> |
<i class="icon-user icon"></i>
<% end %>
</small>
</li>
</div>
<% end %>
and my posts_controller:
require 'rails_autolink'
class PostsController < ApplicationController
before_action :set_post, only: [:show, :edit, :update, :vote]
before_action :require_user, only: [:new, :create, :edit, :update, :vote]
before_action :require_creator, only:[:edit, :update]
def index
#posts = Post.page(params[:page]).order('created_at DESC').per_page(15)
end
def show
#comment = Comment.new
end
def new
#post = Post.new
end
def create
#post = Post.new(post_params)
#post.creator = current_user
if #post.save
flash[:notice] = "You created a post!"
redirect_to posts_path
else
render :new
end
end
def edit
end
def update
#post = Post.find(params[:id])
if #post.update(post_params)
flash[:notice] = "You updated the post!"
redirect_to post_path(#post)
else
render :edit
end
end
def vote
Vote.create(voteable: #post, creator: current_user, vote: params[:vote])
respond_to do |format|
format.js { render :vote } # Renders views/posts/vote.js.erb
end
end
private
def post_params
params.require(:post).permit(:url, :title, :description)
end
def set_post
#post = Post.find(params[:id])
end
def require_creator
access_denied if #post.creator != current_user
end
end

Answer 1

I'm not entirely sure that rails_autolink will do what you're looking to accomplish. Basically, per the documentation, the gem interpolates URLs in outputted text to a hyperlink that encloses the URL as text. By default, markup is outputted as sanitized html_safe strings:
auto_link("Go to http://www.rubyonrails.org and say hello")
# => "Go to http://www.rubyonrails.org and say hello"
You should be using it directly in your view/template and you should not need to require it in our controller. Rails typically requires gem dependencies at application load, so you don't need to include them at runtime.