[HELP] NameError in Discussions#index

Hi everybody!

I’m currently in the process of writing my first ruby on rails app. I’m quite new to the whole thing and I could use some help with an issue i’ve been stuck on for a while.

The goal here is to crease a discussion board where users can comment with microposts. Very simple. The issue is that I am getting the error

NameError in Discussions#index

undefined local variable or method `discussion' for #<#<Class:0x00000103eb4e08>:0x00000103e78bb0>

I’m sure the fix is quite simple. Here’s the relevant code

discussion controller

class DiscussionsController < ApplicationController

before_filter :signed_in_user, only: [:index, :edit, :update]

def show

@user = User.find(params[:id])

@discussions = @user.discussion.paginate(page: params[:page])

@microposts = @user.micropost.paginate(page: params[:page])

end

def index

@discussions = Discussion.all

end

def create

@discussion = current_user.discussions.build(params[:discussion])

if @discussion.save

  flash[:success] = "Discussion Started!"

  redirect_to root_url

else

  render 'static_pages/home'

end

end

def destroy

end

def edit

end

def update

end

def new

end

end

micropost controller

class MicropostsController < ApplicationController

before_filter :signed_in_user, only: [:create, :destroy]

def index

end

def create

@discussion = current_user.discussions.new

@micropost = current_user.microposts.build(params[:micropost])

if @micropost.save

  flash[:success] = "Posted!"

  redirect_to root_url

else

  render 'static_pages/home'

end

end

def destroy

end

end

discussion board

<% content_for :script do %>

<%= javascript_include_tag 'hover_content' %>

<% end %>

  • <%=discussion.intro %>
    <span class = "content"><%= discussion.content %></span>
    
    <div class = "buttons">
    
      <div class = "vote-neg"><%= link_to "Break Up", signup_path,class: "btn btn-large btn-breakup" %></div>
    
      <div class = "vote-plus"><%= link_to "Stay Together", signup_path,class: "btn btn-large btn-staytogether" %></div>
    
    </div>
    
  • Posted <%= time_ago_in_words(discussion.created_at) %> ago.
    

    <% discussion.microposts.each do |micropost|%>

      <li>
    
        <div class = "post-comment"><%= micropost.content%></div>
    
      </li>
    

    <% end %>

    <% if signed_in? %>

    <div class = "row">
    
      <aside class = "span4">
    
        <section>
    
          <%= render 'shared/micropost_form', :locals => {:discussion => discussion }%>
    
        </section>
    
      </aside>
    
    </div>
    

    <% end %>

    micropost form partial

    <% @micropost = Micropost.new %>

    <% @micropost.discussion_id = discussion.id %>

    <%= form_for(@micropost) do |f| %>

    <%= render ‘shared/error_messages’, object: f.object %>

    <%= f.text_area :content, placeholder: “Compose new micropost…” %>

    <%= f.hidden_field :discussion_id, discussion.id%>

    <%= f.submit “Post”, class: “btn btn-large btn-primary” %>

    <% end %>

    thanks!

    You have failed to show us two vital things, firstly which line of
    code the error occurs at, look in the server terminal window and you
    should see the full message and call stack. It should tell you which
    line of your code is generating the error. Secondly you have not told
    us the relations between the models (has_many, belongs_to etc). If
    you do not understand what that means then I suggest starting with a
    good tutorial such as railstutorial.org (free to use online) which
    will show you the basics of rails. In fact I suggest working right
    through a tutorial before starting your own app even if you do
    understand what I mean. Also read (and make sure you understand) the
    Rails Guides.

    Colin

    Change this line:

    @discussions =
    @user.discussion.paginate(page: params[:page])

    for

    @discussions =
    @user.discussions.paginate(page: params[:page])