モデルの不明な属性 'type'

Question

私はイメージを作成してギャラリーに追加するレールでバックグラウンドジョブを実行しています。後でイメージを他のギャラリーに追加することができます。したがって、それらのイメージ間にhas_many_throughの関係があるのは当然です。ジョブは、以下の行に達する

、私はエラーを取得する：

unknown attribute 'type' for GalleryImages. 

私はので、私は、問題は、私はレールを使用する方法で、または完全に何かのいずれかあると思います任意の属性「タイプ」を使用していませんよ私の心の皆さんがこの問題で私を助けてくれることを願っています。

関連宝石

gem 'rails', '4.2.6' 
gem 'sqlite3' 
gem 'delayed_job_active_record' 
gem 'daemons' 

job.rb

class Job < Struct.new(:museum_id) 
    def perform 
     puts "starting bg job" 
     museum = Museum.find(museum_id) 
     begin 
      gallery = museum.gallery.create(name: 'somename', description: 'some virtual museum',) 
     rescue => e 
      puts e 
     end 
     path = '/home/parrot/pic.png' 
     puts path 
     md5 = Digest::MD5.hexdigest(File.read(path)) 
     puts md5 
     begin 
      image = Image.create!(path: path, md5: md5) # create! raises an exception if validation fails 
      gallery.images << image 
     rescue => e 
      puts e.message 
      puts e.backtrace.join("\n") 
     end 
    end 
end 

gallery_image.rb

class GalleryImage < ActiveRecord::Base 
    belongs_to :gallery 
    belongs_to :image 
end 

image.rb

class Image < ActiveRecord::Base 
    has_many :gallery_images, :class_name => 'GalleryImage' 
    has_many :galleries, through: :gallery_images 
    validates :path, :md5, presence: true 
    validates :md5, uniqueness: true 
end 

gallery.rb

class Gallery < ActiveRecord::Base 
    belongs_to :museum 
    has_many :gallery_images, :class_name => 'GalleryImage' 
    has_many :images, through: :gallery_images 
end 

20160427100528_create_gallery_images移行

class CreateGalleryImages < ActiveRecord::Migration 
    def change 
    create_table :gallery_images, id: false do |t| 
     t.belongs_to :gallery, index: true 
     t.belongs_to :image, index: true 
    end 
    end 
end 

schema.rb

ActiveRecord::Schema.define(version: 20160427100528) do 

    create_table "delayed_jobs", force: :cascade do |t| 
    t.integer "priority", default: 0, null: false 
    t.integer "attempts", default: 0, null: false 
    t.text  "handler",    null: false 
    t.text  "last_error" 
    t.datetime "run_at" 
    t.datetime "locked_at" 
    t.datetime "failed_at" 
    t.string "locked_by" 
    t.string "queue" 
    t.datetime "created_at" 
    t.datetime "updated_at" 
    end 

    add_index "delayed_jobs", ["priority", "run_at"], name: "delayed_jobs_priority" 

    create_table "images", force: :cascade do |t| 
    t.string "md5" 
    t.string "path" 
    t.datetime "created_at", null: false 
    t.datetime "updated_at", null: false 
    end 

    create_table "gallery_images", force: :cascade do |t| 
    t.integer "gallery_id" 
    t.integer "image_id" 
    t.datetime "created_at", null: false 
    t.datetime "updated_at", null: false 
    end 

    add_index "gallery_images", ["image_id"], name: "index_gallery_images_on_image_id" 
    add_index "gallery_images", ["gallery_id"], name: "index_gallery_images_on_gallery_id" 

    create_table "galleries", force: :cascade do |t| 
    t.integer "name" 
    t.integer "description" 
    t.integer "museum_id" 
    t.datetime "created_at", null: false 
    t.datetime "updated_at", null: false 
    end 

    create_table "museum_galleries", force: :cascade do |t| 
    t.integer "gallery_id" 
    t.integer "museum_id" 
    end 

    create_table "museums", force: :cascade do |t| 
    t.string "name" 
    t.string "description" 
    t.integer "gallery_id" 
    t.datetime "created_at", null: false 
    t.datetime "updated_at", null: false 
    end 
end 

e.backtrace

/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/attribute_assignment.rb:59:in `rescue in _assign_attribute' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/attribute_assignment.rb:54:in `_assign_attribute' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/attribute_assignment.rb:41:in `block in assign_attributes' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/attribute_assignment.rb:35:in `each' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/attribute_assignment.rb:35:in `assign_attributes' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/core.rb:566:in `init_attributes' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/core.rb:281:in `initialize' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/inheritance.rb:61:in `new' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/inheritance.rb:61:in `new' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/reflection.rb:141:in `build_association' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/association.rb:250:in `build_record' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/collection_association.rb:146:in `build' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/has_many_through_association.rb:95:in `build_through_record' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/has_many_through_association.rb:117:in `save_through_record' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/has_many_through_association.rb:66:in `insert_record' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/collection_association.rb:563:in `block (2 levels) in concat_records' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/collection_association.rb:408:in `replace_on_target' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/collection_association.rb:403:in `add_to_target' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/collection_association.rb:562:in `block in concat_records' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/collection_association.rb:560:in `each' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/collection_association.rb:560:in `concat_records' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/has_many_association.rb:180:in `concat_records' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/has_many_through_association.rb:44:in `concat_records' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/collection_association.rb:168:in `block in concat' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/collection_association.rb:183:in `block in transaction' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/connection_adapters/abstract/database_statements.rb:213:in `block in transaction' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/connection_adapters/abstract/transaction.rb:184:in `within_new_transaction' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/connection_adapters/abstract/database_statements.rb:213:in `transaction' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/transactions.rb:220:in `transaction' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/collection_association.rb:182:in `transaction' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/collection_association.rb:168:in `concat' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/has_many_through_association.rb:38:in `concat' 
/home/parrot/.gem/ruby/2.2.0/gems/activerecord-4.2.6/lib/active_record/associations/collection_proxy.rb:970:in `<<' 
/home/parrot/learn-rails/onlinemuseum/app/jobs/job.rb:24:in `perform' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/backend/base.rb:100:in `block in invoke_job' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:61:in `call' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:61:in `block in initialize' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:66:in `call' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:66:in `execute' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:40:in `run_callbacks' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/backend/base.rb:97:in `invoke_job' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/worker.rb:224:in `block (2 levels) in run' 
/home/parrot/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/timeout.rb:89:in `block in timeout' 
/home/parrot/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/timeout.rb:99:in `call' 
/home/parrot/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/timeout.rb:99:in `timeout' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/worker.rb:224:in `block in run' 
/home/parrot/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/benchmark.rb:303:in `realtime' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/worker.rb:223:in `run' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/worker.rb:300:in `block in reserve_and_run_one_job' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:61:in `call' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:61:in `block in initialize' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:66:in `call' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:66:in `execute' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:40:in `run_callbacks' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/worker.rb:300:in `reserve_and_run_one_job' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/worker.rb:207:in `block in work_off' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/worker.rb:206:in `times' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/worker.rb:206:in `work_off' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/worker.rb:169:in `block (4 levels) in start' 
/home/parrot/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/benchmark.rb:303:in `realtime' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/worker.rb:168:in `block (3 levels) in start' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:61:in `call' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:61:in `block in initialize' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:66:in `call' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:66:in `execute' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:40:in `run_callbacks' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/worker.rb:167:in `block (2 levels) in start' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/worker.rb:166:in `loop' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/worker.rb:166:in `block in start' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/plugins/clear_locks.rb:7:in `call' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/plugins/clear_locks.rb:7:in `block (2 levels) in <class:ClearLocks>' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:79:in `call' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:79:in `block (2 levels) in add' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:61:in `call' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:61:in `block in initialize' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:79:in `call' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:79:in `block in add' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:66:in `call' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:66:in `execute' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/lifecycle.rb:40:in `run_callbacks' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/worker.rb:165:in `start' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/command.rb:131:in `run' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/command.rb:119:in `block in run_process' 
/home/parrot/.gem/ruby/2.2.0/gems/daemons-1.2.3/lib/daemons/application.rb:265:in `call' 
/home/parrot/.gem/ruby/2.2.0/gems/daemons-1.2.3/lib/daemons/application.rb:265:in `block in start_proc' 
/home/parrot/.gem/ruby/2.2.0/gems/daemons-1.2.3/lib/daemons/application.rb:274:in `call' 
/home/parrot/.gem/ruby/2.2.0/gems/daemons-1.2.3/lib/daemons/application.rb:274:in `start_proc' 
/home/parrot/.gem/ruby/2.2.0/gems/daemons-1.2.3/lib/daemons/application.rb:295:in `start' 
/home/parrot/.gem/ruby/2.2.0/gems/daemons-1.2.3/lib/daemons/controller.rb:59:in `run' 
/home/parrot/.gem/ruby/2.2.0/gems/daemons-1.2.3/lib/daemons.rb:193:in `block in run_proc' 
/home/parrot/.gem/ruby/2.2.0/gems/daemons-1.2.3/lib/daemons/cmdline.rb:88:in `call' 
/home/parrot/.gem/ruby/2.2.0/gems/daemons-1.2.3/lib/daemons/cmdline.rb:88:in `catch_exceptions' 
/home/parrot/.gem/ruby/2.2.0/gems/daemons-1.2.3/lib/daemons.rb:192:in `run_proc' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/command.rb:117:in `run_process' 
/home/parrot/.gem/ruby/2.2.0/gems/delayed_job-4.1.1/lib/delayed/command.rb:93:in `daemonize' 
./bin/delayed_job:5:in `<main>' 

Answer 1

あなたは012のようにテーブル名を持っている場合

アプリ/モデル/ gallery_image.rb：

create_table :gallery_images, id: false do |t| 

のモデルとファイル名名前を変更：

class GalleryImage < ActiveRecord::Base 

するか、もしそうであればは、yuorモデルは、GalleryImageと呼ばれるべきですモデル名はGalleryImages、表名は:gallery_imagesesです。

Answer 2

経験豊富な学生の助けを借りて問題を調査したところ、私の環境は壊れていました。それをすべて掃除したらうまくいった。