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copied!<p>Couldn't you just have the form on the post's show form? And then pass the form values to your messages create action?</p> <p>./app/controllers/message_controller.rb</p> <pre><code>class MessageController < ApplicationController def create @message = Message.create(create_message_params) @message.send end private def create_message_params {}.tap do |h| h[:from_user_id] = params[:from_user_id] h[:to_user_id] = params[:to_user_id] h[:text] = params[:text] end end end </code></pre> <p>./app/controllers/post_controller.rb</p> <pre><code>class PostController < ApplicationController def show @post = Post.find(params[:id]) @message = Message.new end end </code></pre> <p>./app/views/posts/show.html.erb</p> <pre><code> <% form_for(@message, url: messages_path do |f| %> <%= hidden_field_tag(:to_user_id, @post.author.id ) %> <%= text_area_tag(:text, @message.text) %> <br/> <%= f.submit("Send Message") %> <% end %> </code></pre> <p><strong>Edit 2013.08.25 from the comments, the wish was for the messages to be in a different view</strong></p> <p>First you'd have a link in the Post's "show" view:</p> <pre><code><%= link_to "Send a message", new_messages_path(to_user_id: @post.author.id) %> </code></pre> <p>Then you'd have to create the new action, and a view, which takes in the incoming <code>to_user_id</code>, and stores it in a hidden field, perhaps. Then when they post to the <code>message_path</code> by submitting that messages form, you'd have the <code>to_user_id</code>, and the message, coupled with the current_user.id. </p> <p>Does that make sense?</p>

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