错误 - 活动模型：：未知属性错误：用于查看的未知属性"名称"

Question

我运行时：

rails db:seed

在命令行中，我得到以下错误：

ActiveModel::UnknownAttributeError: unknown attribute 'name' for Review..........................................................

我运行时也会遇到相同的错误：

rails db:seed

seeds.rb

movie = Movie.find_by(title: 'Iron Man')
movie.reviews.create!(name: "Roger Ebert", stars: 3, comment: "I laughed, I cried, I spilled my popcorn!")
movie.reviews.create!(name: "Gene Siskel", stars: 5, comment: "I'm a better reviewer than he is.")
movie.reviews.create!(name: "Peter Travers", stars: 4, comment: "It's been years since a movie superhero was this fierce and this funny.")
movie = Movie.find_by(title: 'Superman')
movie.reviews.create!(name: "Elvis Mitchell", stars: 5, comment: "It's a bird, it's a plane, it's a blockbuster!")

Genre.create!(name: "Action")
Genre.create!(name: "Comedy")
Genre.create!(name: "Drama")
Genre.create!(name: "Romance")
Genre.create!(name: "Thriller")
Genre.create!(name: "Fantasy")
Genre.create!(name: "Documentary")
Genre.create!(name: "Adventure")
Genre.create!(name: "Animation")
Genre.create!(name: "Sci-Fi")

这是我的架构文件[sic]：

ActiveRecord::Schema.define(version: 20181218222845) do
  # These are extensions that must be enabled in order to support this database
  enable_extension "plpgsql"
  create_table "characterizations", force: :cascade do |t|
    t.bigint "movie_id"
    t.bigint "genre_id"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.index ["genre_id"], name: "index_characterizations_on_genre_id"
    t.index ["movie_id"], name: "index_characterizations_on_movie_id"
  end
  create_table "favorites", force: :cascade do |t|
    t.bigint "movie_id"
    t.bigint "user_id"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.index ["movie_id"], name: "index_favorites_on_movie_id"
    t.index ["user_id"], name: "index_favorites_on_user_id"
  end
  create_table "genres", force: :cascade do |t|
    t.string "name"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
  end
  create_table "movies", force: :cascade do |t|
    t.string "title"
    t.string "rating"
    t.decimal "total_gross"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.text "description"
    t.date "released_on"
    t.string "cast"
    t.string "director"
    t.string "duration"
    t.string "image_file_name", default: ""
    t.string "image_content_type"
    t.integer "image_file_size"
    t.datetime "image_updated_at"
    t.string "main_image"
    t.string "slug"
  end
  create_table "reviews", force: :cascade do |t|
    t.integer "stars"
    t.text "comment"
    t.bigint "movie_id"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.integer "user_id"
    t.index ["movie_id"], name: "index_reviews_on_movie_id"
  end
  create_table "users", force: :cascade do |t|
    t.string "name"
    t.string "email"
    t.string "password_digest"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.string "username"
    t.boolean "admin", default: false
  end
  add_foreign_key "characterizations", "genres"
  add_foreign_key "characterizations", "movies"
  add_foreign_key "favorites", "movies"
  add_foreign_key "favorites", "users"
  add_foreign_key "reviews", "movies"
end

Answer 1

您的reviews表没有name列，这是Rails告诉您的。

我不知道您的应用程序是如何工作的，但是我确实在reviews表上看到了user_id列，并且users表具有name列，所以我想您需要使用该名称属性创建一个用户，然后将用户转到您正在创建的评论中。

没有看到您的Review和User型号，我无法确定。

Answer 2

至少需要创建一个迁移＆amp;运行它以将name字段添加到您的reviews表：

rails generate migration AddNameToReviews name:string
rails db:migrate

这应该解决您报告的错误。