How to delete nested record - ruby-on-rails

Question

My girl model has comments with using gem 'acts_as_commentable'
When I access example.com/girls/show/1
It shows ID#1 girl's profile.
All the posted comments are shown in the bottom of this page.
For each comment row, I want to add delete button to delete a comment.
If it should pass the parameter to girls_controller.rb's comment_destroy action.
How action part and view should be??
It keeps undefined local variable or method `girls' error with codes below.
"girls/show.html.erb" view should be something like this. Just a part.
<table>
<tr>
<th>ID</th>
<th>Title</th>
<th>Body</th>
<th>Subject</th>
<th>Delete</th>
</tr>
<% #all_comments.each do |comment| %>
<tr>
<td><%= comment.id %></td>
<td><%= comment.title %></td>
<td><%= comment.body %></td>
<td><%= comment.subject %></td>
<td><%= button_to 'comment_destroy', girls, confirm: 'Are you sure?', :disable_with => 'deleting...', method: :delete %></td>
</tr>
<% end %>
</table>
girls_controller.rb's comment_destroy action should be something like this
def comment_destroy
#comment = comment.find(params[:id])
#comment.destroy
respond_to do |format|
format.html { redirect_to girls_url }
format.json { head :ok }
end
redirect_to :controller => 'girls', :action => 'show', :id => params[:girls][:id]
flash[:notice] = "comment deleted!"
end

Answer 1

It looks like you have comments nested under a girl, and you want to delete the comment.
Routes
resources :girls do
resources :comments, only: [:create, :destroy]
end
Then, you have a comments controller that handles your creation and destroy.
<%= button_to 'comment_destroy', [#girl, comment], confirm: 'Are you sure?', :disable_with => 'deleting...', method: :delete %>
The destroy method in your comments controller:
def destroy
#girl = Girl.find(params[:girl_id])
#comment = #girl.comments.find(params[:id])
if #comment.destroy
redirect_to #girl, notice: "Comment Removed"
else
redirect_to #girl, error: "We could not remove the comment"
end
end
end
UPDATE -- based on user's request to use a non-restful solution
Routes:
resources :girls do
member do
delete :delete_comment, to: "girls#delete_comment", as: "delete_comment"
end
end
controller
def delete_comment
#girl = Girl.find(params[:id])
#comment = #girl.comments.find(params[:comment_id])
if #comment.destroy
redirect_to #girl, notice: "Comment Removed"
else
redirect_to #girl, error: "We could not remove the comment"
end
end
View link
<%= button_to 'comment_destroy', delete_comment_path(#girl, comment_id: comment.id), confirm: 'Are you sure?', :disable_with => 'deleting...', method: :delete %>
Final note: I really don't like this solution. You should have a Comments controller and go with my first solution.