Rake db:seed 因“不知道如何构建任务 db.seed”而失败

Question

运行 rake db.seed 时出现以下错误，我该如何解决？

（我尝试删除seed.rb并重新创建它，但没有成功）

rake 中止！不知道如何构建任务'db.seed'

/Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rake/task_manager.rb:62:in []' /Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rake/application.rb:149:in invoke_task' /Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rake/application.rb:106:in block (2 levels) in top_level' /Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rake/application.rb:106:in each' /Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rake/application.rb:106:in block in top_level' /Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rake/application.rb:115:in run_with_threads' /Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rake/application.rb:100:in top_level' /Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rake/application.rb:78:in block 正在运行' /Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rake/application.rb:176:in standard_exception_handling' /Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rake/application.rb:75:in run' /Users/user/.rbenv/versions/2.2.1/bin/rake:33:in `

背景资料：

我正在关注tutorial，我在 db.seed 文件中创建了一个模拟用户。

用户创建！电子邮件：'test@test.com'，密码：'密码'， password_confirmation: '密码'

现在当我运行命令 rake db:seed 时，我得到了上面的错误。如何成功运行命令？

Answer 1

为避免将来出现此类错误，您可以在项目目录中键入 bundle exec rake -T 以列出 Rails 应用程序的所有可用 rake 任务：

➜  bundle exec rake -T
rake db:create                          # Creates the database from DATABASE_URL or config/database.yml for the current RAILS_ENV (use db:create:all to create all databa...
rake db:drop                            # Drops the database from DATABASE_URL or config/database.yml for the current RAILS_ENV (use db:drop:all to drop all databases in...
rake db:fixtures:load                   # Load fixtures into the current environment's database
rake db:migrate                         # Migrate the database (options: VERSION=x, VERBOSE=false, SCOPE=blog)
rake db:migrate:status                  # Display status of migrations
rake db:rollback                        # Rolls the schema back to the previous version (specify steps w/ STEP=n)
rake db:schema:cache:clear              # Clear a db/schema_cache.dump file
rake db:schema:cache:dump               # Create a db/schema_cache.dump file
rake db:schema:dump                     # Create a db/schema.rb file that is portable against any DB supported by AR
rake db:schema:load                     # Load a schema.rb file into the database
rake db:seed                            # Load the seed data from db/seeds.rb

然后，只需复制您要查找的任务（在本例中为rake db:seed）并运行 rake 任务！