如何在 ruby​​ on rails 中修复未定义的方法“alias_method_chain”错误？

Question

我刚刚克隆了一个 github repo https://github.com/maxitron93/p2pcollective.com，当我在探索这个很棒的 p2p 借贷应用时遇到了一个错误

NoMethodError：ActiveRecord::ConnectionAdapters::PostgreSQLColumn:Class 的未定义方法 `alias_method_chain'

迁移数据库或运行服务器时。我正在使用 cloud9 ide 来避免我的电脑环境。

浏览了几个解决方案帖子，我用 device 和 erubis 更新了我的 gem 商店，但仍然返回到那个 'alias_method_chain' 错误。

这是我的日志的 sn-p：

rake db:migrate
rake aborted!
NoMethodError: undefined method `alias_method_chain' for ActiveRecord::ConnectionAdapters::PostgreSQLColumn:Class
Did you mean?  alias_method
/usr/local/rvm/gems/ruby-2.3.4/gems/activerecord-postgres-hstore-0.7.8/lib/activerecord-postgres-hstore/activerecord.rb:80:in `<class:PostgreSQLColumn>'
/usr/local/rvm/gems/ruby-2.3.4/gems/activerecord-postgres-hstore-0.7.8/lib/activerecord-postgres-hstore/activerecord.rb:74:in `<module:ConnectionAdapters>'
/usr/local/rvm/gems/ruby-2.3.4/gems/activerecord-postgres-hstore-0.7.8/lib/activerecord-postgres-hstore/activerecord.rb:70:in `<module:ActiveRecord>'
/usr/local/rvm/gems/ruby-2.3.4/gems/activerecord-postgres-hstore-0.7.8/lib/activerecord-postgres-hstore/activerecord.rb:2:in `<top (required)>'
/usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `require'
/usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `block in require'
/usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:256:in `block in load_dependency'
/usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:662:in `new_constants_in'
/usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:256:in `load_dependency'
/usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `require'
/usr/local/rvm/gems/ruby-2.3.4/gems/activerecord-postgres-hstore-0.7.8/lib/activerecord-postgres-hstore/railties.rb:18:in `block (2 levels) in <class:Hstore>'
/usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-5.1.6/lib/active_support/lazy_load_hooks.rb:69:in `instance_eval'
/usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-5.1.6/lib/active_support/lazy_load_hooks.rb:69:in `block in execute_hook'
/usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-5.1.6/lib/active_support/lazy_load_hooks.rb:60:in `with_execution_control'

我希望我的 Rails 服务器从这里顺利运行。

Answer 1

alias_method_chain 在 Rails 5 中已被弃用和删除，但在此之前就存在。看起来已经安装的依赖项（可能是pg）不兼容。您或许可以使用 bundle update pg 解决问题，如果不能，更广泛的 bundle update 应该可以解决问题。

编辑：

这是我在喝咖啡之前上网的结果。负责的 gem 在您的堆栈跟踪中：activerecord-postgres-hstore，它不在您链接到的项目中，这表明您已经进行了其他更改。 Rails 4+ 不需要那个 gem。 More info here