undefined local variable or method `blog'?

I am working on a rails application and I have a Dashboard::user(dashboard/user) controller and I would like for users to update their blog post through the backend of the site. That works fine but when I am trying to get a list of the latest blog post a user has created I get an error.

dashboard/users_controller

def content
   @blog = Blog.new
   render ('content')
 end
 

dashboard/blogs/_blog_list.html.erb

<%= div_for(:dashboard ,blog) do %>
   <%= link_to image_tag(blog.preview.url(:thumb)), dashboard_blog_path(blog) %>
   <h1><%= link_to (blog.title),dashboard_blog_path(blog) %></h1>
    <p><%= truncate blog.excerpt, length: 160 %></p>
   <%= blog.published_at %>
   <%= blog.site_id %>
 <% end %>
 

Any reason why this is not working?

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