我正在閱讀Hartl ruby on rails教程（第2.2節(jié)），而在遷移數(shù)據(jù)庫(kù)時(shí)遇到了麻煩。一切似乎都正常，然后我運(yùn)行rails generate scaffold User name:string email:string 之后，我嘗試運(yùn)行包exec rake db：migrate并收到以下錯(cuò)誤消息：$ bundle exec rake db:migrate == 20141125234257 CreateUsers: migrating ======================================-- create_table(:users) -> 0.0079s== 20141125234257 CreateUsers: migrated (0.0080s) =============================rake aborted!StandardError: An error has occurred, this and all later migrations canceled:wrong number of arguments (1 for 0)/usr/local/rvm/gems/ruby-2.1.4@rails4/gems/activerecord-4.2.0.beta4/lib/active_record/connection_adapters/abstract_adapter.rb:271:in `initialize'/usr/local/rvm/gems/ruby-2.1.4@rails4/gems/activerecord-4.2.0.beta4/lib/active_record/connection_adapters/abstract_adapter.rb:271:in `new'/usr/local/rvm/gems/ruby-2.1.4@rails4/gems/activerecord-4.2.0.beta4/lib/active_record/connection_adapters/abstract_adapter.rb:271:in `substitute_at'/usr/local/rvm/gems/ruby-2.1.4@rails4/gems/activerecord-4.2.0.beta4/lib/active_record/relation.rb:97:in `block in substitute_values'/usr/local/rvm/gems/ruby-2.1.4@rails4/gems/activerecord-4.2.0.beta4/lib/active_record/relation.rb:96:in `each'/usr/local/rvm/gems/ruby-2.1.4@rails4/gems/activerecord-4.2.0.beta4/lib/active_record/relation.rb:96:in `each_with_index'/usr/local/rvm/gems/ruby-2.1.4@rails4/gems/activerecord-4.2.0.beta4/lib/active_record/relation.rb:96:in `substitute_values'/usr/local/rvm/gems/ruby-2.1.4@rails4/gems/activerecord-4.2.0.beta4/lib/active_record/relation.rb:56:in `insert'/usr/local/rvm/gems/ruby-2.1.4@rails4/gems/activerecord-4.2.0.beta4/lib/active_record/persistence.rb:521:in `_create_record'/usr/local/rvm/gems/ruby-2.1.4@rails4/gems/activerecord-4.2.0.beta4/lib/active_record/counter_cache.rb:139:in `_create_record'Tasks: TOP => db:migrate(See full trace by running task with --trace)我嘗試返回到較早的提交，然后再次運(yùn)行所有內(nèi)容，但收到相同的錯(cuò)誤消息。我是否還應(yīng)該添加其他文件來(lái)幫助解決此問(wèn)題？
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尚方寶劍之說(shuō)
TA貢獻(xiàn)1788條經(jīng)驗(yàn) 獲得超4個(gè)贊
以上更改gemfile的解決方案。
gem 'arel', '6.0.0.beta2'
我收到以下錯(cuò)誤消息。
You have requested:arel = 6.0.0.beta2
The bundle currently has arel locked at 6.0.0.
Try running `bundle update arel`
后
bundle update arel
有效
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