问题:

I'm in Rails 4 using Bootstrap

This is my create action in my controller:

  def create
    @contest = Contest.new(contest_params) 
    if @contest.save
      flash[:notice] = "Contest saved successfully"
        redirect_to @contest
    else
        redirect_to root_path, :notice => 'Project not saved'
    end
  end

How come there is no notice when I submit the form? Is there something I am missing? I'm a beginner and have not been able to figure this out.

I have the following in my layout already:

  <body>
    <p class="notice"><%= flash[:notice] %></p>
      <p class="alert"><%= flash[:alert] %></p>

    <%= render 'layouts/header' %>

      <%= yield %>

    <%= render 'layouts/footer' %>

  </body>

回答1:

try like this:

 flash[:notice] = 'Project saved successfully'
 redirect_to about_path

redirect with flash was broken in some versions. Workaround if you want to try:

redirect_to url, :flash => { :notice => "notice" }

also edit your layout

Remove the layouts header in case it conflicts.

 <body>
     <p class="notice"><%= flash[:notice] %></p>
      <p class="alert"><%= flash[:alert] %></p>

      <%= yield %>

    <%= render 'layouts/footer' %>

  </body>

回答2:

Read about the flash. You must display the flash content in your html views, preferably in your layout.

<html>
  <body>
    <% flash.each do |name, msg| -%>
      <%= content_tag :div, msg, class: name %>
    <% end -%>
  </body>
</html>

回答3:

Set <%= flash[:notice] %> in root_path in your html view.

rails notices not appearing

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