在 heroku 上上传种子数据时出错

Question

首先，这是edX Saas课程的家庭作业问题，但我仍然在这里发布，因为错误与我的家庭作业没有直接关系。

我使用 Ruby on Rails 制作了一个应用程序，并将其托管在 heroku 上。我的本地主机上的应用程序显示所有电影的名称，但是当我在heroku上打开它时，看不到电影名称。

我使用heroku run rake:seed来更新我的种子数据。这是我的种子文件：

if count = Movie.count  > 0
Movie.delete_all
puts "deleting #{count} old rows of seed data"
end
movies = [{:title => 'Aladdin', :rating => 'G', :release_date => '25-Nov-1992'},
        {:title => 'The Terminator', :rating => 'R', :release_date => '26-Oct-1984'},
        {:title => 'When Harry Met Sally', :rating => 'R', :release_date => '21-Jul-1989'},
      {:title => 'The Help', :rating => 'PG-13', :release_date => '10-Aug-2011'},
      {:title => 'Chocolat', :rating => 'PG-13', :release_date => '5-Jan-2001'},
      {:title => 'Amelie', :rating => 'R', :release_date => '25-Apr-2001'},
      {:title => '2001: A Space Odyssey', :rating => 'G', :release_date => '6-Apr-1968'},
      {:title => 'The Incredibles', :rating => 'PG', :release_date => '5-Nov-2004'},
      {:title => 'Raiders of the Lost Ark', :rating => 'PG', :release_date => '12-Jun-1981'},
      {:title => 'Chicken Run', :rating => 'G', :release_date => '21-Jun-2000'},
     ]
movies.each do |movie|
 Movie.create!(movie)
end

当我尝试运行heroku run rails console然后Movie.all.我的数据库是：

[#<Movie id: 53, title: nil, rating: nil, description: nil, release_date: nil, created_at: "2014-11-30 18:29:18", updated_at: "2014-11-30 18:29:18">, #<Movie id: 54, title: nil, rating: nil, description: nil, release_date: nil, created_at: "2014-11-30 18:29:18", updated_at: "2014-11-30 18:29:18">, #<Movie id: 55, title: nil, rating: nil, description: nil, release_date: nil, created_at: "2014-11-30 18:29:18", updated_at: "2014-11-30 18:29:18">, #<Movie id: 56, title: nil, rating: nil, description: nil, release_date: nil, created_at: "2014-11-30 18:29:18", updated_at: "2014-11-30 18:29:18">, #<Movie id: 57, title: nil, rating: nil, description: nil, release_date: nil, created_at: "2014-11-30 18:29:18", updated_at: "2014-11-30 18:29:18">, #<Movie id: 58, title: nil, rating: nil, description: nil, release_date: nil, created_at: "2014-11-30 18:29:18", updated_at: "2014-11-30 18:29:18">, #<Movie id: 59, title: nil, rating: nil, description: nil, release_date: nil, created_at: "2014-11-30 18:29:18", updated_at: "2014-11-30 18:29:18">, #<Movie id: 60, title: nil, rating: nil, description: nil, release_date: nil, created_at: "2014-11-30 18:29:18", updated_at: "2014-11-30 18:29:18">, #<Movie id: 61, title: nil, rating: nil, description: nil, release_date: nil, created_at: "2014-11-30 18:29:18", updated_at: "2014-11-30 18:29:18">, #<Movie id: 62, title: nil, rating: nil, description: nil, release_date: nil, created_at: "2014-11-30 18:29:18", updated_at: "2014-11-30 18:29:18">]

为什么标题、评级、描述等数据为零，而我可以在本地托管的应用程序中看到它们？

Answer 1

尝试这样的事情：

m = Movie.new :title => 'Aladdin', :rating => 'G', :release_date => '25-Nov-1992'
m.save

然后尝试：

movies.each do |movie|
 m = Movie.new(movie) #given that movie is in the format above. 
 m.save
end