CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-3activeadmin
elersong
elersong

Reputation: 857

What is " undefined method `rails' ", and how do I fix it?

I'm building a simple setup of ActiveAdmin to get my feet wet with basic admin coding in RoR. Nothing fancy. I generated a "post" controller and resource and model, as shown below. My issue is that I am still getting the following error:

NoMethodError in Admin::PostsController#index
undefined method `rails' for #<Admin::PostsController:0x00000107ad3038>

It's correct in that I haven't defined a rails method, but I also haven't called one. In fact, there's no rails method called anywhere in any of my code. This leads me to believe that I have a syntax issue somewhere, but I can't seem to find it. Please help me make sense of this.

/admin/post.rb

ActiveAdmin.register Post do

  scope_to :rails

  permit_params :title, :slug, :blurb, :content, :category_id

  index do
    column :title
    column :slug
    column :blurb
    column :created_at
    actions
  end

  form :html => {:enctype => "multipart/form-data"} do |f|
    f.inputs "Details" do
      f.input :title
      f.input :slug
      f.input :blurb
      f.input :category
      f.input :content, :as => :text
    end

    f.inputs "Images" do
      f.input :image, :label => 'Post Image', :as => :file
    end
    f.actions
  end

end

/controllers/posts_controller.rb

class PostsController < ApplicationController

  def index
    @posts = Post.all
  end

  def show
   @post = Post.find(params[:id])
  end

end

/models/post.rb

class Post < ActiveRecord::Base

  belongs_to :category
  scope :rails, -> { where(category_id: 1) }

end

As you can see, I never call any rails method in my code. Where is that error coming from?

Upvotes: 0

Views: 607

Answers (1)

manishie
manishie

Reputation: 5322

This error is probably coming from this line in your view admin/post.rb:

scope_to :rails

Try commenting that out.

Then try something like this instead:

ActiveAdmin.register Post do
  controller do
    def resource
      Post.where(category_id: 1)
    end
  end
end

Upvotes: 1

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