运行简单的控制台命令（例如Release.first（也尝试过release.first）时出现此错误。在尝试其他表时，我也遇到了类似的错误。
我的release.rb是
module default
class Release < ActiveRecord::Base
self.table_name = 'releases'
self.inheritance_column = 'ruby_type'
self.primary_key = 'id'
if ActiveRecord::VERSION::STRING < '4.0.0' || defined?(ProtectedAttributes)
attr_accessible :artist, :all_artists, :format, :title, :label, :label_no_country, :link, :genre, :date, :image, :favourite, :time, :category, :format_category, :soundclip_1, :soundclip_2, :spotify, :digital_link, :display, :zero_inch_id, :zero_inch_link, :zero_release_url
end
has_many :alerts_sents, :foreign_key => 'release_id', :class_name => 'AlertsSent'
has_many :audio_links, :foreign_key => 'release_id', :class_name => 'AudioLink'
has_many :charts_extendeds, :foreign_key => 'release_id', :class_name => 'ChartsExtended'
has_many :juno_sales, :foreign_key => 'release_id', :class_name => 'JunoSale'
has_many :not_recommendeds, :foreign_key => 'release_id', :class_name => 'NotRecommended'
has_many :num_release_recs, :foreign_key => 'release_id', :class_name => 'NumReleaseRec'
has_many :recommendations, :foreign_key => 'release_id', :class_name => 'Recommendation'
has_many :release_artists, :foreign_key => 'release_id', :class_name => 'ReleaseArtist'
has_many :spotifies, :foreign_key => 'release_id', :class_name => 'Spotify'
has_many :twitter_posteds, :foreign_key => 'release_id', :class_name => 'TwitterPosted'
has_many :user_adds, :foreign_key => 'release_id', :class_name => 'UserAdd'
end
end
错误是
NameError: uninitialized constant Release
from (irb):1
from /Users/siquick/.rvm/gems/ruby-2.1.3/gems/railties-4.2.1/lib/rails/commands/console.rb:110:in `start'
from /Users/siquick/.rvm/gems/ruby-2.1.3/gems/railties-4.2.1/lib/rails/commands/console.rb:9:in `start'
from /Users/siquick/.rvm/gems/ruby-2.1.3/gems/railties-4.2.1/lib/rails/commands/commands_tasks.rb:68:in `console'
from /Users/siquick/.rvm/gems/ruby-2.1.3/gems/railties-4.2.1/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from /Users/siquick/.rvm/gems/ruby-2.1.3/gems/railties-4.2.1/lib/rails/commands.rb:17:in `<top (required)>'
from /Users/siquick/Rails/soundshelter/bin/rails:8:in `<top (required)>'
from /Users/siquick/.rvm/rubies/ruby-2.1.3/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Users/siquick/.rvm/rubies/ruby-2.1.3/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from -e:1:in `<main>'
数据库位于远程服务器上，我使用rare_map
生成模型schema.rb
# encoding: UTF-8
# This file is auto-generated from the current state of the database. Instead
# of editing this file, please use the migrations feature of Active Record to
# incrementally modify your database, and then regenerate this schema definition.
#
# Note that this schema.rb definition is the authoritative source for your
# database schema. If you need to create the application database on another
# system, you should be using db:schema:load, not running all the migrations
# from scratch. The latter is a flawed and unsustainable approach (the more migrations
# you'll amass, the slower it'll run and the greater likelihood for issues).
#
# It's strongly recommended that you check this file into your version control system.
ActiveRecord::Schema.define(version: 20150910131323) do
create_table "releases", force: :cascade do |t|
t.string "artist", limit: 255, null: false
t.string "all_artists", limit: 200, null: false
t.string "format", limit: 80, null: false
t.string "title", limit: 255, null: false
t.string "label", limit: 255, null: false
t.string "label_no_country", limit: 255, null: false
t.text "link", limit: 65535, null: false
t.string "genre", limit: 50, null: false
t.string "date", limit: 80, null: false
t.text "image", limit: 65535, null: false
t.string "favourite", limit: 1, null: false
t.string "time", limit: 20, null: false
t.string "category", limit: 30, null: false
t.string "format_category", limit: 20, null: false
t.string "soundclip_1", limit: 255, null: false
t.string "soundclip_2", limit: 255, null: false
t.string "spotify", limit: 100, null: false
t.string "digital_link", limit: 255, null: false
t.string "display", limit: 1, null: false
t.integer "zero_inch_id", limit: 4, null: false
t.text "zero_inch_link", limit: 65535, null: false
t.string "zero_release_url", limit: 150, null: false
end
add_index "releases", ["all_artists"], name: "all_artists", using: :btree
add_index "releases", ["all_artists"], name: "all_artists_2", using: :btree
add_index "releases", ["all_artists"], name: "all_artists_3", using: :btree
add_index "releases", ["all_artists"], name: "all_artists_4", using: :btree
add_index "releases", ["all_artists"], name: "all_artists_5", using: :btree
add_index "releases", ["artist"], name: "artist", using: :btree
add_index "releases", ["artist"], name: "artist_2", using: :btree
add_index "releases", ["artist"], name: "artist_3", using: :btree
add_index "releases", ["artist"], name: "artist_4", using: :btree
add_index "releases", ["category"], name: "category", using: :btree
add_index "releases", ["date"], name: "date", using: :btree
add_index "releases", ["format"], name: "format", using: :btree
add_index "releases", ["format_category"], name: "format_category", using: :btree
add_index "releases", ["format_category"], name: "format_category_2", using: :btree
add_index "releases", ["genre"], name: "genre", using: :btree
add_index "releases", ["genre"], name: "genre_2", using: :btree
add_index "releases", ["genre"], name: "genre_3", using: :btree
add_index "releases", ["genre"], name: "genre_4", using: :btree
add_index "releases", ["id"], name: "id", using: :btree
add_index "releases", ["id"], name: "id_2", using: :btree
add_index "releases", ["label"], name: "label", using: :btree
add_index "releases", ["label"], name: "label_2", using: :btree
add_index "releases", ["label_no_country"], name: "label_no_country", using: :btree
add_index "releases", ["label_no_country"], name: "label_no_country_2", using: :btree
add_index "releases", ["label_no_country"], name: "label_no_country_3", using: :btree
add_index "releases", ["label_no_country"], name: "label_no_country_4", using: :btree
add_index "releases", ["label_no_country"], name: "label_no_country_5", using: :btree
add_index "releases", ["spotify", "zero_release_url"], name: "spotify_2", using: :btree
add_index "releases", ["spotify"], name: "spotify", using: :btree
add_index "releases", ["title"], name: "title", using: :btree
add_index "releases", ["zero_inch_id"], name: "zero_inch_id", using: :btree
add_foreign_key "releases", "charts_extended", column: "id", primary_key: "release_id", name: "releases_ibfk_1"
end
答案 0 :(得分：1)
您的Release类是在default模块中定义的（由于Ruby类/模块应该从大写开始，btw也会拼写错误），因此您将无法仅使用{{{{}}来引用它。 1}}在模块范围之外。
更改定义并取出模块。
Report您可能还想删除所有各种不必要的设置，例如 class Release < ActiveRecord::Base
self.table_name = 'releases'
self.inheritance_column = 'ruby_type'
self.primary_key = 'id'
if ActiveRecord::VERSION::STRING < '4.0.0' || defined?(ProtectedAttributes)
attr_accessible :artist, :all_artists, :format, :title, :label, :label_no_country, :link, :genre, :date, :image, :favourite, :time, :category, :format_category, :soundclip_1, :soundclip_2, :spotify, :digital_link, :display, :zero_inch_id, :zero_inch_link, :zero_release_url
end
has_many :alerts_sents, :foreign_key => 'release_id', :class_name => 'AlertsSent'
has_many :audio_links, :foreign_key => 'release_id', :class_name => 'AudioLink'
has_many :charts_extendeds, :foreign_key => 'release_id', :class_name => 'ChartsExtended'
has_many :juno_sales, :foreign_key => 'release_id', :class_name => 'JunoSale'
has_many :not_recommendeds, :foreign_key => 'release_id', :class_name => 'NotRecommended'
has_many :num_release_recs, :foreign_key => 'release_id', :class_name => 'NumReleaseRec'
has_many :recommendations, :foreign_key => 'release_id', :class_name => 'Recommendation'
has_many :release_artists, :foreign_key => 'release_id', :class_name => 'ReleaseArtist'
has_many :spotifies, :foreign_key => 'release_id', :class_name => 'Spotify'
has_many :twitter_posteds, :foreign_key => 'release_id', :class_name => 'TwitterPosted'
has_many :user_adds, :foreign_key => 'release_id', :class_name => 'UserAdd'
end
并删除table_name，除非您使用旧版本的Rails。
看起来你使用的生成器添加了一堆不必要的代码。