Question

I have a blogging application that has posts that can receive votes through a vote action in the posts controller.
Because I allow voting in both the index and show views, I redirect_to :back after a vote is made, as below.

def vote
  # voting logic goes here
  redirect_to :back
end

This redirects me to the correct page, but I want to redirect to the specific post within the page. To do this, I added an identifying anchor to my post partial div.

<div id="post_<%= post.id %>">
  <%= post.content %>
</div>

How can I reference this in my redirect_to :back? I tried the below, which doesn’t work.

# this doesn't work!
redirect_to :back, anchor: "post_#{@post.id}"

Alternatively, if I were to use an if clause for the show and index views, how do I do that? I tried the below, which returns undefined method 'current_page' for VocabsController.

#this doesn't work!
if current_page?(posts_path)
  redirect_to posts_path(anchor: "post_#{@post.id}"
else
  redirect_to @post
end

Answer 1

I ended up using Javascript instead.

posts_controller.rb

def vote
  @post = Post.find(params[:id])
  #voting logic
  respond_to do |format|
    format.html { redirect_to :back }
    format.js
  end
end

posts/_post.html.erb

<div class="post_partial" id="post_<%= post.id %>">
  <%= post.content %>
  <div id="vote_button_<%= post.id %>">
    <%= link_to "up", vote_path, method: "post", remote: true %>
  </div>
</div>

posts/vote.js.erb

$('#post_<%= @post.id %>').html('<%= j render @post %>');