ArgumentError：参数数量错误（0 代表 1）答案

【问题标题】：ArgumentError: wrong number of arguments (0 for 1)ArgumentError：参数数量错误（0 代表 1）
【发布时间】：2011-07-05 08:42:26
【问题描述】：

我正在尝试在第 7 章的 Rails 教程中测试在 sqlite3 db 中插入一行。我已经检查了很多次代码，它看起来是正确的，但是在控制台中我得到了以下错误。有什么建议？

User.create(name=>"test user",:email=>"testuser@example.com",:password=>"foobar",:password_confirmation=>"foobar") ArgumentError：参数数量错误（0 代表 1）来自 /Library/Ruby/Gems/1.8/gems/activerecord-3.0.3/lib/active_record/base.rb:442:in maximum' from /Library/Ruby/Gems/1.8/gems/activerecord-3.0.3/lib/active_record/base.rb:442:insend' 来自 /Library/Ruby/Gems/1.8/gems/activerecord-3.0.3/lib/active_record/base.rb:442:in maximum' from /Users/gabemcmillan/rails_projects/sample_app/app/models/user.rb:10 from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:454:inload' 来自 /Library/Ruby/Gems/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:454:in load_file' from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:596:innew_constants_in' 来自 /Library/Ruby/Gems/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:453:in load_file' from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:340:inrequire_or_load' 来自 /Library/Ruby/Gems/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:491:in load_missing_constant' from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:183:inconst_missing' 来自 /Library/Ruby/Gems/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:181:in each' from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:181:inconst_missing' 来自 (irb):8

【问题讨论】：

标签： ruby-on-rails

【解决方案1】：

应该是User.create(:name...（name 之前有一个冒号），而不是User.create(name...

【讨论】：

解决了！！非常感谢！