Question

我正在做hartle教程的第12章。当我运行bundle exec rake db:seed时出现此错误：

ActiveRecord::RecordInvalid: Validation failed: Email has already been taken

我试着跑

rake db:reset
rake db:migrate
rake db:test:prepare

最后

rake db:populate

但他们没有解决问题。当我运行rake db:populate时，它会给出：

Don't know how to build task 'db:populate'

这是我的seeds.rb文件：

    # Users
User.create!(name:  "Example User",
             email: "example@railstutorial.org",
             password:              "foobar",
             password_confirmation: "foobar",
             admin:     true,
             activated: true,
             activated_at: Time.zone.now)

99.times do |n|
  name  = Faker::Name.name
  email = "example-#{n+1}@railstutorial.org"
  password = "password"
  User.create!(name: name,
              email: email,
              password:              password,
              password_confirmation: password,
              activated: true,
              activated_at: Time.zone.now)
end

# Microposts
users = User.order(:created_at).take(6)
50.times do
  content = Faker::Lorem.sentence(5)
  users.each { |user| user.microposts.create!(content: content) }
end

# Following relationships
users = User.all
user  = users.first
following = users[2..50]
followers = users[3..40]
following.each { |followed| user.follow(followed) }
followers.each { |follower| follower.follow(user) }

我想问题可能是这一行email = "example-#{n+1}@railstutorial.org"

Answer 1

尝试使用：

如果案例已经是现有的电子邮件，它将解决它。

email = "example-#{rand(100000)}@railstutorial.org"

您还可以看到错误：

user = User.new(name:  "Example User",
         email: "example@railstutorial.org",
         password:              "foobar",
         password_confirmation: "foobar",
         admin:     true,
         activated: true,
         activated_at: Time.zone.now)
user.errors
user.save if user.valid

Answer 2

你的Gemfile中是否安装了faker和populator？这很可能是问题的一部分。确保你已经运行：

gem install populator #From the command line

并将其包含在您的Gemfile中：

gem 'populator'

以下是Git repo https://github.com/ryanb/populator/tree/master

的链接

这里还有很棒的文章：http://sudharti.github.io/articles/using-faker-and-populator-rails/

rake db：seed验证失败

2 个答案: