Active Admin NoMethodError Error - ruby-on-rails

Question

Im setting up active admin on my rails app. I ran the generator to create the user resource but when i click on the users link on the admin dashboard i get:
NoMethodError in Admin/users#index
Showing /Users/nelsonkeating/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/gems/1.9.1/gems/activeadmin-0.4.4/app/views/active_admin/resource/index.html.arb where line #1 raised:
undefined method `city_id_contains' for #<MetaSearch::Searches::User:0x007fde92d69840>
Extracted source (around line #1):
1: render renderer_for(:index)
I have no clue what is generating this or where the error is coming from.. Any ideas? Thanks! (please let me know if you need to see any other files)
Models:
user.rb
class User < ActiveRecord::Base
rolify
devise :database_authenticatable, :registerable, :confirmable,
:recoverable, :rememberable, :trackable, :validatable
attr_accessible :province_id, :city_id
belongs_to :province
belongs_to :city
province.rb
class Province < ActiveRecord::Base
has_many :cities
has_many :users
end
city.rb
class City < ActiveRecord::Base
belongs_to :province
has_many :users
end
schema.rb
create_table "users", :force => true do |t|
t.string "email", :default => "", :null => false
t.string "encrypted_password", :default => "", :null => false
t.string "reset_password_token"
t.datetime "reset_password_sent_at"
t.datetime "remember_created_at"
t.integer "sign_in_count", :default => 0
t.datetime "current_sign_in_at"
t.datetime "last_sign_in_at"
t.string "current_sign_in_ip"
t.string "last_sign_in_ip"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
t.string "name"
t.date "date_of_birth"
t.string "address"
t.string "gender"
t.integer "zipcode"
t.string "city"
t.string "status"
t.string "confirmation_token"
t.datetime "confirmed_at"
t.datetime "confirmation_sent_at"
t.string "unconfirmed_email"
t.integer "province_id"
t.integer "city_id"
end
create_table "provinces", :force => true do |t|
t.string "name"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
end
create_table "cities", :force => true do |t|
t.string "name"
t.integer "province_id"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
end

Answer 1

This question helped me solve my problem. I had to read the comments to figure out how to solve it so I am providing the answer here:
If you have a model that contains a belongs_to relationship, Active Admin will not like it if you have a column name that matches your belongs to foreign key id column name.
For instance in this case your foreign key is 'city_id' but you also have a column named 'city'. Active Admin doesn't like this. And likewise it really doesn't make sense to have that column to begin with. Since you will access the city through the relationship.
To fix this you should create a migration that removes the city column.
class RemoveCityFromUser < ActiveRecord::Migration
def up
remove_column :users, :city
end
end