Rails - routing error on delete -

update rephrased after learning

i have extended app new model called 'tag' (very similar set comments in blog).

intended outcome: user stay on page when clicking link_to button delete tag; routing error (below) , don't understand why.

no route matches [delete] "/annotations/7/tags"

the tag list added view annotations this:

<div class="panel panel-default" style="background-color: white;  word-wrap: break-word; font-size: 0.9em;">     <table id="tags" class="table table-hover">         <thead>             <tr>                 <th>tag</th>                 <th>type</th>                 <th></th>             </tr>         </thead>         <tbody>             <% @annotation.tags.each |tag| %>                 <tr>                     <td><%= tag.content %></td>                     <td><%#= tag.tagtype_id | tag.tagtype.typeoftag %></td>                     <td><%= link_to '', [tag.annotation, tag], method: :delete, data: { confirm: 'please confirm deletion!' }, :class => "glyphicon glyphicon-remove" %></td>                 </tr>             <% end -%>         </tbody>     </table> </div> 

these routes:

rails.application.routes.draw   root 'dashboard#index'   devise_for :users   resources :users, :documenttypes, :tagtypes    resources :documents     resources :tags     "pdf", on: :member     end    resources :annotations     resources :comments, :tags     "pdf", on: :member  end  "annotations/:id/annotate" => "annotations#annotate", as: 'annotate' "angular_test", to: "angular_test#index"  mount pdfjsviewer::rails::engine => "/pdfjs", as: 'pdfs' 

and tags.controller

class tagscontroller < applicationcontroller  def create @annotation = annotation.find(params[:annotation_id]) @comment = @annotation.tags.create(tag_params) redirect_to annotation_path(@annotation) end  def destroy   @annotation = annotation.find(params[:annotation_id])   @comment = @annotation.tags.find(params[:id])   @comment.destroy   redirect_to annotate_path(@annotation) end  private  def tag_params    params.require(:tag).permit(:content, :location, :tagtype_id)  end  end 

update table in view has empty row, cannot delete. routing error. rows created when adding tag, not happen , can delete them. why getting empty row?

this needs done using ajax (asynchronously), need have destroy action respond javascript. can adding remote option link deletion below:

<td><%= link_to 'delete', [tag.annotation, tag], method: :delete, remote: true, data: { confirm: 'please confirm deletion!' }, :class => "glyphicon glyphicon-remove" %></td> 

the remote: true option makes request ajax. on controller side need respond resulting javascript code want execute, hiding row want delete.

in views folder, under tags controller need create file called destroy.js , in file specify code want executed handling hide example row.