执行“heroku db:migrate”并收到错误“请安装 postgresql 适配器”
我正在尝试使用 mySQL 数据库执行 heroku db:migrate ，但收到错误/建议：
请安装 postgresql 适配器： gem install activerecord-postgresql-adapter （pg 不属于将其添加到 Gemfile 中。）
我尝试将“gem install activerecord-postgresql-adapter”放入我的 gem 文件中，但是当我运行捆绑安装时，我得到：
夏洛特-dator:showwwdown holgersindbaek$ 捆绑安装 /Users/holgersindbaek/Projekter/Showwwdown/showwwdown/Gemfile:34:in evaluate': 未定义的局部变量或方法activerecord' for # (NameError) 来自 /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler/definition.rb:17:in build' 来自 /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler.rb:138:in定义' 来自 /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler/cli.rb:219:in install' 来自 /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler/vendor/thor/task.rb:22:in发送' 来自 /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler/vendor/thor/task.rb:22:in run' 来自 /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler/vendor/thor/inspiration.rb:118:ininvoke_task' 来自 /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler/vendor/thor.rb:263:in dispatch' 来自 /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler/vendor/thor/base.rb:386:instart' 来自/Library/Ruby/Gems/1.8/gems/bundler-1.0.21/bin/bundle:13 来自 /usr/bin/bundle:19:in `load' 来自 /usr/bin/bundle:19
希望你能帮忙。谢谢！
I'm trying to do a heroku db:migrate with my mySQL database and I'm getting the error/suggestion:
Please install the postgresql adapter: gem install activerecord-postgresql-adapter (pg is not part of the bundle. Add it to Gemfile.)
I try to put the "gem install activerecord-postgresql-adapter" in my gem-file, but when I run bundle install, I get:
charlotte-dator:showwwdown holgersindbaek$ bundle install
/Users/holgersindbaek/Projekter/Showwwdown/showwwdown/Gemfile:34:in evaluate': undefined local variable or methodactiverecord' for # (NameError)
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler/definition.rb:17:in build'definition'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler.rb:138:in
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler/cli.rb:219:in install'send'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler/vendor/thor/task.rb:22:in
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler/vendor/thor/task.rb:22:in run'invoke_task'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler/vendor/thor/invocation.rb:118:in
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler/vendor/thor.rb:263:in dispatch'start'
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/lib/bundler/vendor/thor/base.rb:386:in
from /Library/Ruby/Gems/1.8/gems/bundler-1.0.21/bin/bundle:13
from /usr/bin/bundle:19:in `load'
from /usr/bin/bundle:19
Hope you can help. Thanks!
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将以下行添加到您的 gemfile（相反）：
如果您在开发中不使用 Postgres，您可以这样做：
Add the following line to your gemfile (instead):
If you don't use Postgres in development, you can do this:
确保您推送到 heroku 的分支是 master 分支。
就我而言，我已经尝试了以上所有内容&它不起作用。当我推送 git 存储库时，我犯了另一个错误，我没有推送 master 分支，而是推送了另一个“命名”分支。因此，即使更新 gem 文件等后，我的更改也没有得到反映。
Make sure the branch you are pushing to heroku is master branch.
In my case i had tried all above & it was not working. I had done another mistake when i pushed my git repository i didn't push master branch but instead another 'named' branch. So my changes were not getting reflected even after updating gem file etc .