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PORuby on Rails: undefined method "comments" for nil:NilClass
 

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  1. PORuby on Rails: undefined method "comments" for nil:NilClass
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    <p>I am developing an app with users where they each have set of microposts displayed on their pages. I am trying to add comments to these microposts. Every time I visit localhost:3000/users/(user_id_#)</p> <p>I get this error: undefined method `comments' for nil:NilClass</p> <p>This error only comes when the user has microposts to show. Otherwise it just shows their blank page. The error comes from this view for app/views/users/show.html.erb This view renders this partial, where the error occurs in line 13. </p> <pre><code>&lt;li&gt; &lt;span class="content"&gt;&lt;%= micropost.content %&gt;&lt;/span&gt; &lt;span class="timestamp"&gt; Posted &lt;%= time_ago_in_words(micropost.created_at) %&gt; ago. &lt;/span&gt; &lt;% if current_user?(micropost.user) %&gt; &lt;%= link_to "delete", micropost, method: :delete, confirm: "You sure?", title: micropost.content %&gt; &lt;% end %&gt; &lt;h2&gt;Comments&lt;/h2&gt; &lt;% micropost.comments.each do |comment| %&gt; &lt;p&gt; &lt;b&gt;Commenter:&lt;/b&gt; &lt;%= comment.commenter %&gt; &lt;/p&gt; &lt;p&gt; &lt;b&gt;Comment:&lt;/b&gt; &lt;%= comment.body %&gt; &lt;/p&gt; &lt;% end %&gt; &lt;h3&gt;Add a comment:&lt;/h3&gt; &lt;%= form_for([micropost, micropost.comments.build]) do |f| %&gt; &lt;div class="field"&gt; &lt;%= f.label :commenter %&gt;&lt;br /&gt; &lt;%= f.text_field :commenter %&gt; &lt;/div&gt; &lt;div class="field"&gt; &lt;%= f.label :body %&gt;&lt;br /&gt; &lt;%= f.text_area :body %&gt; &lt;/div&gt; &lt;div class="actions"&gt; &lt;%= f.submit %&gt; &lt;/div&gt; &lt;% end %&gt; &lt;/li&gt; </code></pre> <p>Here is my comment.rb file</p> <pre><code>class Comment &lt; ActiveRecord::Base belongs_to :micropost attr_accessible :body, :user_id end </code></pre> <p>and my micropost.rb file</p> <pre><code>class Micropost &lt; ActiveRecord::Base attr_accessible :content belongs_to :user has_many :comments validates :content, presence: true, length: { maximum: 140 } validates :user_id, presence: true end </code></pre> <p>and my comments_controller.rb</p> <pre><code>class CommentsController &lt; ApplicationController def create @micropost = Micropost.find(params[:micropost_id]) @comment = @micropost.comments.create(params[:comment]) redirect_to micropost_path(@micropost) end end </code></pre> <p>and finally my microposts_controller.rb</p> <pre><code>class MicropostsController &lt; ApplicationController before_filter :signed_in_user before_filter :correct_user, only: :destroy def create @micropost = current_user.microposts.build(params[:micropost]) if @micropost.save flash[:success] = "Micropost created!" redirect_to root_path else @feed_items = [] render 'static_pages/home' end end def new @micropost = Micropost.new(params[:micropost]) end def show @micropost = Micropost.find(params[:id]) end def destroy @micropost.destroy redirect_back_or root_path end private def correct_user @micropost = current_user.microposts.find_by_id(params[:id]) redirect_to root_path if @micropost.nil? end end class CommentsController &lt; ApplicationController def create @micropost = Micropost.find(params[:micropost_id]) @comment = @micropost.comments.create(params[:comment]) redirect_to micropost_path(@micropost) end end </code></pre> <p>also here is the users_controller.rb</p> <pre><code>class UsersController &lt; ApplicationController before_filter :signed_in_user, only: [:index, :edit, :update, :destroy, :following, :followers] before_filter :correct_user, only: [:edit, :update] before_filter :admin_user, only: :destroy def index @users = User.paginate(page: params[:page]) end def show @user = User.find(params[:id]) @micropost = @user.microposts.first @comment = Comment.new end def new @user = User.new end def create @user = User.new(params[:user]) if @user.save sign_in @user flash[:success] = "Welcome to the Sample App!" redirect_to @user else render 'new' end end def edit end def update if @user.update_attributes(params[:user]) flash[:success] = "Profile updated" sign_in @user redirect_to @user else render 'edit' end end def destroy User.find(params[:id]).destroy flash[:success] = "User destroyed." redirect_to users_path end def following @title = "Following" @user = User.find(params[:id]) @users = @user.followed_users.paginate(page: params[:page]) render 'show_follow' end def followers @title = "Followers" @user = User.find(params[:id]) @users = @user.followers.paginate(page: params[:page]) render 'show_follow' end private def correct_user @user = User.find(params[:id]) redirect_to(root_path) unless current_user?(@user) end def admin_user redirect_to(root_path) unless current_user.admin? end end </code></pre> <p>from the error it sounds like the @micropost isnt being initialized in the microposts_controller.rb file under def show. but I think it is? What am I doing wrong? Thanks </p> <p>also here is app/views/users/show.html.erb</p> <pre><code>&lt;% provide(:title, @user.name) %&gt; &lt;div class="row"&gt; &lt;aside class="span4"&gt; &lt;section&gt; &lt;h1&gt; &lt;%= gravatar_for @user %&gt; &lt;%= @user.name %&gt; &lt;/h1&gt; &lt;/section&gt; &lt;/aside&gt; &lt;div class="span8"&gt; &lt;%= render 'follow_form' if signed_in? %&gt; &lt;% if @user.microposts.any? %&gt; &lt;h3&gt;Microposts (&lt;%= @user.microposts.count %&gt;)&lt;/h3&gt; &lt;ol class="microposts"&gt; &lt;%= render @microposts %&gt; &lt;/ol&gt; &lt;%= will_paginate @microposts %&gt; &lt;% end %&gt; &lt;/div&gt; &lt;/div&gt; </code></pre>
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    1. USBigBoy1337
    1. USBigBoy1337
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    1. CODo you have a UsersController? By convention, I would expect users/(user_id_#) to be routed there.
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      1. PORuby on Rails: undefined method "comments" for nil:NilClass
      1. USRich Drummond
    2. COi just added the users_controller.rb. Should I somehow define the comments method in this under def show? how should I write it? Would a line like @comment = @micropost.comments.create(params[:comment]) work?
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      1. USBigBoy1337
 

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