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POHow to display associated model's attribute in Active Admin index with belongs_to/has_many relationship (Rails 3.2/Active Admin)
 

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  1. POHow to display associated model's attribute in Active Admin index with belongs_to/has_many relationship (Rails 3.2/Active Admin)
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    <p>I'm building a daily deal Rails app to learn RoR.</p> <p>I am facing a problem for the past few hours : i can't get a model's attribute of an other associated model on active admin. Let me show you exactly the problem :</p> <p>I have two models: Brand (i.e the brand of the deal) and Deal. A deal belongs to a Brand but a Brand can have many Deals.</p> <p>models/deal.rb is like this:</p> <pre><code>class Deal &lt; ActiveRecord::Base belongs_to :brand </code></pre> <p>and we have models/brand.rb:</p> <pre><code>class Brand &lt; ActiveRecord::Base has_many :deals attr_accessible :name </code></pre> <p>And i did the t.belongs_to in my migrations so this is ok.</p> <p>In Active Admin's Deals' create form , i type, as admin, which brand the deal is associated with:</p> <p>admin/game.rb</p> <pre><code>ActiveAdmin.register Deal do # -- Form ----------------------------------------------------------- form do |f| f.inputs "Brand (i.e. client)" do f.input :brand_id, :label =&gt; "Select a brand:", :as =&gt; :select, :collection =&gt; Brand.all end </code></pre> <p>it works great, and i can create Deals with a certain brand. but <strong>I CAN'T manage to display the NAME of the Brand in my list of Deals</strong>:</p> <pre><code>ActiveAdmin.register Deal do index do selectable_column # id_column column :title column :deal_amount column :brand do |deal| link_to deal.brand.name end </code></pre> <p>...doesn't work.</p> <p>How can I do that ?</p> <p>I tried everything but <strong>i basically don't know how to fetch the name of a Brand given it matches the brand_id in the Deal's table</strong>.</p> <p>Any help appreciated.</p>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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