Undefined method `user' in Posts>Show view - ruby-on-rails

Question

Getting this error in posts>show when I try to load up a form.
The form is for users to send messages to each other. Grateful for any feedback!
Thanks.
NoMethodError in Posts#show
Showing /Users/fkhalid2008/loand/app/views/posts/show.html.erb where line #1 raised:
undefined method `user' for #<Post:0x12e2ae930>
Extracted source (around line #1):
1: <%= form_remote_tag (:update => 'message', :url => {:controller => 'main', :action => 'send_message', :user_id => #post.user.id}) do %>
2: <br>
3: <br />
4: <br />
POSTS>SHOW VIEW
<%= form_remote_tag (:update => 'message', :url => {:controller => 'main', :action => 'send_message', :user_id => #post.user.id}) do %>
<br>
<br />
<br />
<div class="field">
Hello! My name is <%= f.text_field :subject %> and I'm contacting you in response to your ad. I'm interested in learning more so get in touch! Here's my contact details: <%= f.text_field :body %>.
</div>
<button type="submit" class="btn span6 large">Submit</button>
<% end %>
POSTS CONTROLLER
def new
#post = Post.new
respond_to do |format|
format.html # new.html.erb
format.json { render :json => #post }
end
end
def edit
#post = Post.find(params[:id])
end
def create
#post = Post.new(params[:post])
respond_to do |format|
if verify_recaptcha && #post.save
format.html { redirect_to :action=> "index"}
format.json { render :json => #post, :status => :created, :location => #post }
else
format.html { render :action => "new" }
format.json { render :json => #post.errors, :status => :unprocessable_entity }
end
end
end
MAIN CONTROLLER
class MainController < ApplicationController
def send_message
message = Message.new
message.subject = params[:subject]
message.body = params[:message]
message.sender = User.find session[:user]
message.recipient = User.find params[:user_id]
if message.save
ContactMailer.deliver_message_email message.recipient.email, message.id, request.host
return redirect_to "/posts"
else
render :text => "Hmm. Something seems to be wrong...let me look into it"
end
CONTACT MAILER
class ContactMailer < ActionMailer::Base
def message_email (recipient, id, host)
recipients [ recipient ]
subject "Weddoo: You have received a new message"
from "admin#weddoo.com"
bcc ["admin#weddoo.com"]
content_type "text/html"
body :message_id => id, :host => host
sent_on Time.now
end
end
end
ROUTES.RB
Mysalary::Application.routes.draw do
resources :users do
resources :messages
end
resources :profiles
resources :pages
resources :posts
get "pages/home"
get "pages/about"
get "pages/legal"
get "pages/feedback"
root :to => 'posts#new'
end
POST MODEL
class Post < ActiveRecord::Base
attr_accessible :title, :job, :location, :salary
validates :title, :job, :location, :salary, :presence => true
validates :salary, :numericality => {:greater_than_or_equal_to => 1}
default_scope :order => 'posts.created_at DESC'
end

Answer 1

The error is saying there is no method user on the Post model. It points you directly to the first line.
<%= form_remote_tag (:update => 'message', :url => {:controller => 'main', :action => 'send_message', :user_id => #post.user.id}) do %>
so I'd say
#post.user.id is your problem statement, that model doesn't have a method user but it's hard to know for sure without seeing the Post model.

Answer 2

I think you have missed to add relationship.
class Post < ActiveRecord::Base
belongs_to :user
end