Question

Right now I have this in my video show view:

<% @video.topics.each do |topic| %>
  <%= topic.name %>
<% end %>

Problem is that if a video has been associated with two of the same topics, it shows the topic twice. How can I fix this so that it only shows the unique topics?

Answer 1

While you should probably have some validations in your model(s) to prevent this from happening, you can call #uniq on the array of topics:

@video.topics.uniq.each do |topic|