升级到 Ruby 2.7.6

在撰写本文时，Ruby v2.7.6 是 v3.0 之前的最新版本，如果应用程序使用依赖于 BigDecimal 的库，升级到 v2.7.6 可能会遇到重大问题。

The problem

NoMethodError:
  undefined method `new' for BigDecimal:Class

The reason for the above error is since ruby v2.7, the bigdecimal gem is upgraded to v2.0 with a breaking change that drops BigDecimal.new support.

The solution

  • For app code, replace BigDecimal.new with BigDecimal()
- bd = BigDecimal.new(100)
+ bd = BigDecimal(100)
  • For app using database gem such as mysql2 with version older than v0.5, upgrade the gem to v5.0+ in Gemfile and run bundle update mysql2
- gem 'mysql2', '0.4.10'
+ gem 'mysql2', '0.5.4'
  • (Not-recommended) Lock bigdecimal to an older version before v2.0 if no other solutions work, for example
gem 'bigdecimal', '1.4.4'

参考资料

ruby

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