我无法通过user.preferences.regions访问Preference
这是我的class Preference < ApplicationRecord
belongs_to :user
has_many :preference_regions
has_many :regions, through: :preference_regions
has_many :preference_home_airports
has_many :home_airports, through: :preference_home_airports, source: :airport
has_many :vacations
accepts_nested_attributes_for :vacations
end
类（忽略单个/多个偏好之间的混淆，我已经照顾好了）
User这是我的require_relative './user/omniauth'
class User < ApplicationRecord
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :validatable
devise :omniauthable, omniauth_providers: %i[facebook]
has_one :preferences, class_name: "Preference"
has_many :vacations, through: :preferences
has_many :regions, through: :preferences
has_many :home_airports, through: :preferences
after_create do |user|
user.preferences = Preference.create
end
end
课
preferences.regions我认为user.home_airports是多对多的事实，但另一种通过关系的ActiveRecord::Schema.define(version: 2019_02_05_181942) do
create_table "preference_home_airports", force: :cascade do |t|
t.bigint "preference_id"
t.bigint "airport_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["airport_id"], name: "index_preference_home_airports_on_airport_id"
t.index ["preference_id"], name: "index_preference_home_airports_on_preference_id"
end
create_table "preference_regions", force: :cascade do |t|
t.bigint "preference_id"
t.bigint "region_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["preference_id"], name: "index_preference_regions_on_preference_id"
t.index ["region_id"], name: "index_preference_regions_on_region_id"
end
create_table "preferences", force: :cascade do |t|
t.integer "user_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "regions", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "slug"
end
create_table "user_airports", force: :cascade do |t|
t.integer "user_id"
t.integer "airport_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "user_regions", force: :cascade do |t|
t.integer "user_id"
t.integer "region_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "users", force: :cascade 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.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "provider"
t.string "uid"
t.string "first_name"
t.string "last_name"
t.index ["email"], name: "index_users_on_email", unique: true
t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
end
create_table "vacations", force: :cascade do |t|
t.string "name"
t.date "start_date"
t.date "end_date"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "preference_id"
end
add_foreign_key "deal_origins", "airports"
add_foreign_key "deal_origins", "deals", on_delete: :cascade
add_foreign_key "preference_home_airports", "airports"
add_foreign_key "preference_home_airports", "preferences", column: "preference_id"
add_foreign_key "preference_regions", "preferences", column: "preference_id"
add_foreign_key "preference_regions", "regions"
end
可以正常工作。
有什么想法吗？
PS。这是我的架构的相关部分：
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