embedded ruby in css id of form_for text_area

Question

I have a text_area in a rails form helper:

<%= form_for(@comment, remote: true) do |f| %>
  <%= f.text_area :content, placeholder: "Comment...", class: "common", 
id: "comments-@post.id"%>
  <span><%= hidden_field_tag :post_id, @post.id %></span>
  <%= f.submit "Post Comment", class: "comment-submit btn btn-primary" %>
<% end %>

I would like to add an id number to the text_area's css id, so that once translated it is something like id="comments-1" or id="comments-42"

In order to do this I need to use some embedded ruby as the id number is stored in the variable @post.id, however I'm getting an error because I'm putting embedded ruby: ( @post.id ) into more embedded ruby: ( <%= f.text_area ... %> )

is there a way to get around this?

Answer 1

将id: "comments-@post.id"替换为id: "comments-#{@post.id}"