ruby on rails - why it keep saying undefined method -

problem undefined method"title" #category

but knows parameters:

{"id"=>"1"}

this cloth.rb

class cloth < activerecord::base belongs_to :category end 

this category.rb

class category < activerecord::base has_many :cloth end 

this category.html.erb problem @ line 16 = <%=@categories.title%>

  <div class="col-md-9">             <div class="dreamcrub">              <ul class="breadcrumbs">                  <li class="home">                    <a href="index.html" title="go home page">home</a>&nbsp;                    <span>&gt;</span>                 </li>                 <li class="home">&nbsp;                     apparel&nbsp;                     <span>&gt;</span>&nbsp;                 </li>                 <li>                    <%=@categories.title%>                 </li>              </ul>             <ul class="previous">                 <li><a href="index.html">back previous page</a></li>             </ul>             <div class="clearfix"></div>            </div> 

this cloths_controller.rb

 class clothscontroller < applicationcontroller  before_action :set_cloth, only: [:show, :edit, :update, :destroy]   def category   @cloths = cloth.all   @categories = category.all   end     # /cloths  # /cloths.json  def index   @cloths = cloth.all   @categories = category.all    @cloths = cloth.paginate(:page => params[:page], :per_page => 3)  end   # /cloths/1  # /cloths/1.json  def show   @cloths = cloth.all   @categories = category.all   @comments = comment.where("cloth_id = ?", @cloth.id)   @comments = comment.paginate(:page => params[:page], :per_page => 3)  end       #private   private  # use callbacks share common setup or constraints between actions.  def set_cloth   @cloth = cloth.find(params[:id]) end  # never trust parameters scary internet, allow white list through. def cloth_params   params.require(:cloth).permit(:title, :category_id, :description) end  def comment_params   params.require(:comment).permit(:author,:email,:message) end  def category_params   params.require(:category).permit(:title,:id,:description) end end 

    there error in category model. association should like,     has_many :cloths      besides this, @categories array must have iterate on @categories array title of each category given below:  <div class="col-md-9">   <div class="dreamcrub">    <ul class="breadcrumbs">        <li class="home">          <a href="index.html" title="go home page">home</a>&nbsp;          <span>&gt;</span>       </li>       <li class="home">&nbsp;           apparel&nbsp;           <span>&gt;</span>&nbsp;       </li>       <li>          <% @categories.each |category| %>            <%= category.title %>          <% end %>       </li>    </ul>   <ul class="previous">       <li><a href="index.html">back previous page</a></li>   </ul>   <div class="clearfix"></div> </div>