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我想在我的評論控制器寫我的刪除方法。我的評論模型與其他模型具有多態關聯,但在這種情況下,我們只關注旅行。換句話說,@trip = @commentable。無法重定向到無評論控制器#銷燬(多態協會)
該評論被刪除就好了,但我不斷收到錯誤ActionController::ActionControllerError in CommentsController#destroy: Cannot redirect to nil!
當我redirect_to @commentable這將是評論屬於的旅程。
我也在我的創建動作(評論控制器)中重定向到@commentable,並且在用戶創建新評論時工作得很好。
任何提示?
視圖(人次/ show.html.erb)
<% if [email protected]? %>
<% @commentable.comments.each do |comment| %>
<!-- Content -->
<%= link_to comment, :method => :delete do %> delete <% end %>
<% end %>
<% end %>
評論的形式,對創建工作的行動
<%= form_for [@commentable, Comment.new] do |f| %>
<%= f.text_area :content %>
<div id="comment_submit_button"><%= f.submit "Comment" %></div>
<% end %>
trips_controller.rb
def show
@trip = @commentable = Trip.find(params[:id])
@comments = Comment.all
end
comments_controller.rb
def create
@commentable = find_commentable
@comment = @commentable.comments.build(params[:comment])
@comment.user_id = current_user.id
if @comment.save
redirect_to @commentable
end
end
def destroy
# @commentable = find_commentable this line was wrong
@comment = Comment.find(params[:id])
@commentable = @comment.commentable #this line fixed it
if @comment.destroy
redirect_to @commentable
end
end
def find_commentable
params.each do |name, value|
if name =~ /(.+)_id$/
return $1.classify.constantize.find(value)
end
end
nil
end