ArgumentError：参数数量错误（0表示1）

Question

我正在尝试测试在sqlite3 db中插入一行，对于第7章中的Rails教程。我已经多次查看代码并且它看起来是正确的，但是在控制台中我收到以下错误。有什么建议？

  

    

User.create（name =＆gt;“test user”，：email =＆gt;“testuser@example.com”，：password =＆gt;“foobar”，：password_confirmation =＆gt;“foobar”）     ArgumentError：参数数量错误（0表示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:in 发送'         from /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:in load'         from /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:in new_constants_in'         from /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:in require_or_load'         from /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:in const_missing'         from /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:in const_missing'         来自（irb）：8

  

Answer 1

应为User.create(:name...（name之前有冒号），而不是User.create(name...