Unable to query in a rails has_many :through relation

Question

I am trying to get my relationships worked out but I am having trouble using the associations.

So I have three models User, Shop and Access. A user should have many shops and a shop should have many users.

The models are :

class User < ActiveRecord::Base
  has_many :accesses
  has_many :stores, through: :accesses
end

class Store < ActiveRecord::Base
  has_many :accesses
  has_many :users, through: :accesses
end

class Access < ActiveRecord::Base
  belongs_to :user
  belongs_to :store
end

The corresponding schema is

ActiveRecord::Schema.define(version: 20140108102103) do

  create_table "accesses", force: true do |t|
    t.integer  "user_id"
    t.integer  "store_id"
    t.string   "permission"
    t.datetime "created_at"
    t.datetime "updated_at"
  end

  create_table "stores", force: true do |t|
    t.string   "tin"
    t.text     "address"
    t.datetime "created_at"
    t.datetime "updated_at"
    t.string   "store_name"
    t.float    "credit"
  end

  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,  null: false
    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"
    t.datetime "updated_at"
  end

  add_index "users", ["email"], name: "index_users_on_email", unique: true
  add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true

end

Now, when I query User.first.stores

ActiveRecord::HasManyThroughAssociationNotFoundError: Could not find the association :accesss in model User

Does anyone have any idea why I am getting this error?

Answer 1

I'm kind of shooting in the dark here, but try:

# config/initializers/inflections.rb
ActiveSupport::Inflector.inflections do |inflect|
  inflect.irregular 'access', 'accesses'
end

Answer 2

I've copied all your code on a new project.

 => #<User id: 1, email: "test@test.com", encrypted_password: "", reset_password_token: nil, reset_password_sent_at: nil, remember_created_at: nil, sign_in_count: 0, current_sign_in_at: nil, last_sign_in_at: nil, current_sign_in_ip: nil, last_sign_in_ip: nil, created_at: "2014-01-08 16:52:01", updated_at: "2014-01-08 16:52:01"> 
 2.0.0-p353 :004 > User.first
 User Load (0.2ms)  SELECT "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT 1
 => #<User id: 1, email: "test@test.com", encrypted_password: "", reset_password_token: nil, reset_password_sent_at: nil, remember_created_at: nil, sign_in_count: 0, current_sign_in_at: nil, last_sign_in_at: nil, current_sign_in_ip: nil, last_sign_in_ip: nil, created_at: "2014-01-08 16:52:01", updated_at: "2014-01-08 16:52:01"> 
 2.0.0-p353 :005 > User.first.stores
 User Load (0.2ms)  SELECT "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT 1
 Store Load (0.2ms)  SELECT "stores".* FROM "stores" INNER JOIN "accesses" ON "stores"."id" = "accesses"."store_id" WHERE "accesses"."user_id" = ?  [["user_id", 1]]
 => #<ActiveRecord::Associations::CollectionProxy []>

Everything works fine. Rails 4.0.1, ruby 2.0.0-p353. Seems problem is in some other code. Or in a typo, but I've copied code directly from here into a new model.

Also just a blind shot: do you store each model in a separate file?