Looks like I had not run the generator to get the views. With this generator, you get the hashtag helper file which includes this method.
def linkify_hashtags(hashtaggable_content)
regex = SimpleHashtag::Hashtag::HASHTAG_REGEX
hashtagged_content = hashtaggable_content.to_s.gsub(regex) do
link_to($&, hashtag_path($2), {class: :hashtag})
end
hashtagged_content.html_safe
end
That's the method to use to get the hashtags to turn into links.