在rails/rails仓库执行rake test:mysql2时遭遇NoMethodError错误

在rails/rails代码仓库执行rake test:mysql2命令时，触发如下错误：

/Users/dorianmariefr/src/rails/activerecord/lib/active_record/dynamic_matchers.rb:22:in `method_missing': undefined method `reset_default_attributes!' for class ARUnit2Model (NoMethodError)
Did you mean?  reset_default_attributes
    from /Users/dorianmariefr/src/rails/activerecord/lib/active_record/attributes.rb:267:in `reload_schema_from_cache'
    from /Users/dorianmariefr/src/rails/activerecord/lib/active_record/timestamp.rb:86:in `reload_schema_from_cache'
    from /Users/dorianmariefr/src/rails/activerecord/lib/active_record/attributes.rb:292:in `reset_default_attributes'
    from /Users/dorianmariefr/src/rails/activerecord/lib/active_record/attributes.rb:6:in `reload_schema_from_cache'
    from <internal:kernel>:187:in `loop'
    from <internal:prelude>:5:in `irb'
    from /Users/dorianmariefr/src/rails/activerecord/lib/active_record/attributes.rb:266:in `reload_schema_from_cache'
    from /Users/dorianmariefr/src/rails/activerecord/lib/active_record/timestamp.rb:86:in `reload_schema_from_cache'
    from /Users/dorianmariefr/src/rails/activerecord/lib/active_record/model_schema.rb:568:in `inherited'
    from /Users/dorianmariefr/src/rails/activerecord/lib/active_record/inheritance.rb:286:in `inherited'
    from /Users/dorianmariefr/src/rails/activerecord/lib/active_record/locking/optimistic.rb:195:in `inherited'
    from /Users/dorianmariefr/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/activemodel-7.1.2/lib/active_model/attribute_methods.rb:381:in `inherited'
    from /Users/dorianmariefr/src/rails/activerecord/lib/active_record/attribute_methods.rb:262:in `inherited'
    from /Users/dorianmariefr/src/rails/activerecord/lib/active_record/attribute_methods/primary_key.rb:147:in `inherited'
    from /Users/dorianmariefr/src/rails/activerecord/lib/active_record/reflection.rb:136:in `inherited'
    from /Users/dorianmariefr/src/rails/activerecord/test/models/arunit2_model.rb:3:in `<top (required)>'
    ... 19 levels...

错误核心是代码中调用了不存在的reset_default_attributes!方法，系统提示的正确方法是reset_default_attributes。

解决步骤 #

1. 打开文件/Users/dorianmariefr/src/rails/activerecord/lib/active_record/attributes.rb
2. 定位到第267行，将reset_default_attributes!修改为reset_default_attributes
3. 保存文件后重新执行rake test:mysql2

原因分析 #

这是典型的代码笔误，在reload_schema_from_cache方法中错误地调用了带感叹号的方法名，而Active Record实际提供的是不带感叹号的reset_default_attributes方法。

内容的提问来源于stack exchange，提问作者Dorian