Ruby On Rails. Destroy Method does not work if link has been voted on *Reddit Clone*

I am able to delete the links that are assigned to each user, unless they are voted upon. If a link has any votes on it the delete method being called no longer works.

This is the error I am getting.

undefined method `name' for nil:NilClass

Extracted source (around line #59):

# DELETE /links/1.json
def destroy
    @link.destroy
    respond_to do |format|
      format.html { redirect_to links_url, notice: 'Link was successfully destroyed.' }
      format.json { head :no_content }

Rails.root: /Users/ipbyrne/FirstRailsApp/raddit

Application Trace | Framework Trace | Full Trace app/controllers/links_controller.rb:59:in `destroy' Request

Parameters:

{"_method"=>"delete",
 "authenticity_token"=>"3JyyNGNPHhdVcQ7tZQ64t+ouQjiNFnwxQXw25fgJGX4=",
 "id"=>"5"}

The first block below is my show.html.erb where the destroy method is being called from

The second block is my links_controller.rb file.

<div class="page-header">
    <h1><a href="<%= @link.url %>"><%= @link.title %></a><br> <small>Submitted by <%= @link.user.name %></small></h1>
</div>

<div class="btn-group">
        <%= link_to 'Visit URL', @link.url, class: "btn btn-primary" %>
</div>

<div class="btn-group pull-right">
  <%= link_to like_link_path(@link), method: :put, class: "btn btn-default btn-sm" do %>
    <span class="glyphicon glyphicon-chevron-up"></span>
    Upvote
    <%= @link.get_upvotes.size %>
  <% end %>
  <%= link_to dislike_link_path(@link), method: :put, class: "btn btn-default btn-sm" do %>
    <span class="glyphicon glyphicon-chevron-down">
    Downvote
    <%= @link.get_downvotes.size %>
  <% end %>
</div>

<% if @link.user == current_user -%>
        <div class="btn-group">
                <%= link_to 'Edit', edit_link_path(@link), class: "btn btn-default" %>
                <%= link_to 'Destroy', @link, method: :delete, data: { confirm: 'Are you sure?' }, class: "btn btn-default" %>
        </div>
<% end %>

<h3 class="comments_title">
  <%= @link.comments.count %> Comments
</h3>

<div id="comments">
  <%= render :partial => @link.comments %>
</div>
<%= simple_form_for [@link, Comment.new]  do |f| %>
  <div class="field">
    <%= f.text_area :body, class: "form-control" %>
  </div>
  <br>
  <%= f.submit "Add Comment", class: "btn btn-primary" %>
<% end %>

class LinksController < ApplicationController
  before_action :set_link, only: [:show, :edit, :update, :destroy]
  before_action :authenticate_user!, except: [:index, :show]
  before_action :authorized_user, only: [:edit, :update, :destroy]

  # GET /links
  # GET /links.json
  def index
    @links = Link.all
  end

  # GET /links/1
  # GET /links/1.json
  def show
  end

  # GET /links/new
  def new
    @link = current_user.links.build
  end

  # GET /links/1/edit
  def edit
  end

  # POST /links
  # POST /links.json
  def create
    @link = current_user.links.build(link_params)

    respond_to do |format|
      if @link.save
        format.html { redirect_to @link, notice: 'Link was successfully created.' }
        format.json { render :show, status: :created, location: @link }
      else
        format.html { render :new }
        format.json { render json: @link.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /links/1
  # PATCH/PUT /links/1.json
  def update
    respond_to do |format|
      if @link.update(link_params)
        format.html { redirect_to @link, notice: 'Link was successfully updated.' }
        format.json { render :show, status: :ok, location: @link }
      else
        format.html { render :edit }
        format.json { render json: @link.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /links/1
  # DELETE /links/1.json
  def destroy
    @link.destroy
    respond_to do |format|
      format.html { redirect_to links_url, notice: 'Link was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  def upvote
    @link = Link.find(params[:id])
    @link.upvote_by current_user
    redirect_to :back
  end

  def downvote
    @link = Link.find(params[:id])
    @link.downvote_from current_user
    redirect_to :back
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_link
      @link = Link.find(params[:id])
    end

    def authorized_user
      @link = current_user.links.find_by(id: params[:id])
      redirect_to links_path, notice: "Not authorized to edit this link" if @link.nil?
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def link_params
      params.require(:link).permit(:title, :url)
    end
end