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POhaving error while association in models
 

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  1. POhaving error while association in models
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    <p>i have a simple project in which i created a <code>view</code>, <code>controller</code>,<code>model</code>, <code>migration</code> using the following syntax: </p> <pre><code>rails g scaffold user name:string contact:string </code></pre> <p>then i created a model only with the following command:</p> <pre><code>rails g model event event_name:string event_place:string </code></pre> <p>then i created association in the models which you can see in the following code.</p> <p>code of <code>user.rb</code> class is following:</p> <pre><code>class User &lt; ActiveRecord::Base has_many :events attr_accessible :contact, :name, :events_attributes accepted_nested_attributes_for :events end </code></pre> <p>code of <code>event.rb</code> class is following:</p> <pre><code>class Event &lt; ActiveRecord::Base belongs_to :user attr_accessible :event_name, :event_place end </code></pre> <p>the code of the <code>index.html.erb</code> is following:</p> <pre><code>&lt;h1&gt;Listing users&lt;/h1&gt; &lt;table&gt; &lt;tr&gt; &lt;th&gt;Name&lt;/th&gt; &lt;th&gt;Contact&lt;/th&gt; &lt;th&gt;&lt;/th&gt; &lt;th&gt;&lt;/th&gt; &lt;th&gt;&lt;/th&gt; &lt;/tr&gt; &lt;% @users.each do |user| %&gt; &lt;tr&gt; &lt;td&gt;&lt;%= user.name %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= user.contact %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= link_to 'Show', user %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= link_to 'Edit', edit_user_path(user) %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= link_to 'Destroy', user, method: :delete, data: { confirm: 'Are you sure?' } %&gt;&lt;/td&gt; &lt;/tr&gt; &lt;% end %&gt; &lt;/table&gt; &lt;br /&gt; &lt;%= link_to 'New User', new_user_path %&gt; </code></pre> <p>and i haven't changed anything in my views..... as the scaffold generate itself. when i run my code on browser it shows following error:</p> <pre><code> NoMethodError in Users#index Showing /home/wasif/projects/club/app/views/users/index.html.erb where line #12 raised: undefined method `each' for nil:NilClass Extracted source (around line #12): 9: &lt;th&gt;&lt;/th&gt; 10: &lt;/tr&gt; 11: 12: &lt;% @users.each do |user| %&gt; 13: &lt;tr&gt; 14: &lt;td&gt;&lt;%= user.name %&gt;&lt;/td&gt; 15: &lt;td&gt;&lt;%= user.contact %&gt;&lt;/td&gt; </code></pre> <p>This is the code of <code>users_controller.rb</code></p> <pre><code>class UsersController &lt; ApplicationController # GET /users # GET /users.json def index @users = user.all respond_to do |format| format.html # index.html.erb format.json { render json: @user } end end # GET /users/1 # GET /users/1.json def show @User = User.find(params[:id]) respond_to do |format| format.html # show.html.erb format.json { render json: @user } end end # GET /user/new # GET /user/new.json def new @user = User.new respond_to do |format| format.html # new.html.erb format.json { render json: @user } end end # GET /user/1/edit def edit @user = User.find(params[:id]) end # POST /users # POST /users.json def create @user = User.new(params[:user]) respond_to do |format| if @user.save format.html { redirect_to @user, notice: 'User was successfully created.' } format.json { render json: @user, status: :created, location: @user } else format.html { render action: "new" } format.json { render json: @user.errors, status: :unprocessable_entity } end end end # PUT /users/1 # PUT /users/1.json def update @user = User.find(params[:id]) respond_to do |format| if @user.update_attributes(params[:user]) format.html { redirect_to @user, notice: 'User was successfully updated.' } format.json { head :no_content } else format.html { render action: "edit" } format.json { render json: @user.errors, status: :unprocessable_entity } end end end # DELETE /users/1 # DELETE /users/1.json def destroy @user = User.find(params[:id]) @user.destroy respond_to do |format| format.html { redirect_to user_url } format.json { head :no_content } end end end </code></pre> <p>I dont know what to do now, and how can i remove error, as i m beginner so please help me what to do now. Thanks in Advance! </p>
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    1. USwasi khn
    1. USwasi khn
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      1. VTDownMod
    1. COShow your `users_controller.rb` please.
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      1. USPeter Tretyakov
    2. COU r missing something in your controller code.paste the `UsersController` Code Here.
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      1. USAbibullah Rahamathulah
    3. COdid you run 'rake db:migrate' ?
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      1. USThaha kp
 

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