在heroku上，rake db：migrate失败，并显示“数据库配置未指定适配器”。

通过已部署的应用程序添加数据会成功，但会运行 heroku run rake db：migrate 仍然失败。

这是我的Gemfile：

我建议删除数据库：

如果您要在heroku上托管，请继续并使用postgres查看您的所有环境。删除sqlite gem并且只包含 pre $ $ b $ c $ <$ pre

靠近您的Gemfile顶部。

执行a：

尝试再次提交并重新推送（您已知道如何执行此操作）。

让我知道如果这样做't work。

PS，这里是我的database.yml文件的样子：

I've followed the Rails Tutorial up to the linked point.

Here's the shell output:

I've consulted the Heroku quick start, and done a bit of Googling. I suspected the problem was with config/database.yml since that is full of references to sqlite3 in my development environment. However, on the server, the same file includes these lines, among others:

Adding data through the deployed application succeeds, but running heroku run rake db:migrate still fails.

Here's my Gemfile:

I would recommend dropping your databases with:

If you are going to be hosting on heroku, go ahead and use postgres for all of your environments. Delete the sqlite gem and just include

near the top of your Gemfile.

Peform a:

Try to commit and push again (you know how to do that already).

Let me know if that doesn't work.

PS, here is what my database.yml file looks like: