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I’m currently trying to get ActiveAdmin to work on a model of mine but always get the error:
NoMethodError in Admin/hotel_rooms#index
Showing /home/maxp/.rvm/gems/ruby-1.9.3-p125/gems/activeadmin-0.4.3/app/views/active_admin/resource/index.html.arb where line #1 raised:
undefined method `join' for nil:NilClass
Extracted source (around line #1):
1: render renderer_for(:index)
And I’m kinda clueless why this is happening. I hope someone can help.
The table in the database didn’t have an ID as primary key.