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POHow do I access data from a joined table in my index.html.erb?
 

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  1. POHow do I access data from a joined table in my index.html.erb?
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    <p>I have a Rails 4 app with two models Campus and Stat. Campus has_many stats and Stat belongs_to Campus. </p> <p>The problem I have is I can the data from my Campus table in my show action, but not in my index action. Here's the relevant code from the controllers.</p> <pre><code> def index @stats = Stat.all end def show end </code></pre> <p>Here's my show.html.erb:</p> <pre><code>&lt;p id="notice"&gt;&lt;%= notice %&gt;&lt;/p&gt; &lt;p&gt; &lt;strong&gt;Attendance:&lt;/strong&gt; &lt;%= @stat.attendance %&gt; &lt;/p&gt; &lt;p&gt; &lt;strong&gt;Salvations:&lt;/strong&gt; &lt;%= @stat.salvations %&gt; &lt;/p&gt; &lt;p&gt; &lt;strong&gt;Visitors:&lt;/strong&gt; &lt;%= @stat.visitors %&gt; &lt;/p&gt; &lt;p&gt; &lt;strong&gt;Offering:&lt;/strong&gt; &lt;%= @stat.offering %&gt; &lt;/p&gt; &lt;p&gt; &lt;strong&gt;Campus:&lt;/strong&gt; &lt;%= @stat.campus.name %&gt; &lt;/p&gt; &lt;p&gt; &lt;strong&gt;Date:&lt;/strong&gt; &lt;%= @stat.date %&gt; &lt;/p&gt; &lt;%= link_to 'Edit', edit_stat_path(@stat) %&gt; | &lt;%= link_to 'Back', stats_path %&gt; </code></pre> <p>It's outputs the following:</p> <p>Attendance: 23</p> <p>Salvations: 0</p> <p>Visitors: 3</p> <p>Offering: 5000.0</p> <p>Campus: Revelstoke</p> <p>Date: 2013-07-05</p> <p>Edit | Back</p> <p>Here's the relevant portion of my index.html.erb:</p> <pre><code>&lt;% @stats.each do |stat| %&gt; &lt;tr&gt; &lt;td&gt;&lt;%= stat.attendance %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= stat.salvations %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= stat.visitors %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= stat.offering %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= stat.date %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= stat.time %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= stat.campus.name %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= link_to 'Show', stat %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= link_to 'Edit', edit_stat_path(stat) %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= link_to 'Destroy', stat, method: :delete, data: { confirm: 'Are you sure?' } %&gt;&lt;/td&gt; &lt;/tr&gt; &lt;% end %&gt; </code></pre> <p>The output gives me a undefined method `name' for nil:NilClass for the stat.campus.name</p> <p>I can't figure out why the difference. What am I doing wrong?</p>
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    1. PO
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    1. USDave Olson
    1. USDave Olson
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      1. POHow do I access data from a joined table in my index.html.erb?
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      1. VTUpMod
    1. COLook at the `@stat.campus.name` in show and `stat.campus` in index. Remove `stat.time` in index and change `stat.campus` to `stat.campus.name` and you have the same output.
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      1. POHow do I access data from a joined table in my index.html.erb?
      1. USHiasinho
    2. COSorry, my first post was incorrect. With the stat.campus.name in index.html.erb it returns an undefined method error
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      1. POHow do I access data from a joined table in my index.html.erb?
      1. USDave Olson
 

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