加载“ mysql2”活动记录适配器时出错 [英] Error loading the 'mysql2' Active Record adapter

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问题描述

我正在尝试升级我的应用程序,这是部署应用程序时遇到的错误:

I am trying to upgrade my app and this is the error I am getting while deploying the app:


加载'mysql2时出错'Active Record适配器。缺少它所依赖的宝石?无法激活mysql2(<0.6.0,> = 0.4.4),已经激活了mysql2-0.3.21。确保所有依赖项都已添加到Gemfile中。

Error loading the 'mysql2' Active Record adapter. Missing a gem it depends on? can't activate mysql2 (< 0.6.0, >= 0.4.4), already activated mysql2-0.3.21. Make sure all dependencies are added to Gemfile.

这是我的Gemfile:
https://github.com/BI-CTSICN/sparc-request/blob/master/Gemfile

here is my Gemfile: https://github.com/BI-CTSICN/sparc-request/blob/master/Gemfile

 gem 'mysql2', '~> 0.3.18'
 gem 'rails', '~> 5.1', '>= 5.1.4'

我正在使用ruby 2.4.2

I am using ruby 2.4.2

推荐答案

您使用的 mysql2 版本( 0.3.21 ,在 Gemfile.lock 中签入)太旧,需要其中一个比 0.4.4

Your mysql2 version you use (0.3.21, checked in Gemfile.lock) is too old, required one is newer than 0.4.4.

通过更改 Gemfile 中的版本来升级 mysql2 gem并运行捆绑更新mysql2 。当然,在那之前,请检查版本之间的变化,然后运行测试以检查升级是否没有任何问题。

Upgrade your mysql2 gem by changing version in Gemfile and running bundle update mysql2. Of course before that check what changed between versions and then run your tests to check if upgrade didn't break anything.

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