Ruby on rails PG:：ConnectionBad:无法连接到服务器（heroku）

我可以推到heroku很好。。但是，当我运行rake时，会出现以下错误： PG:：ConnectionBad:无法连接到服务器

我可以在本地运行，所以不太清楚为什么我在推heroku时遇到问题-任何帮助都会很好

我怀疑这与我的database.yml文件有关：

# SQLite version 3.x
#   gem install sqlite3
#
#   Ensure the SQLite 3 gem is defined in your Gemfile
#   gem 'sqlite3'
#
default: &default
  adapter: postgresql
  pool: 5
  timeout: 5000

development:
  <<: *default
  database: db/development.sqlite3

# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
  <<: *default
  database: db/test.sqlite3




production:
  <<: *default
  database: db/production.sqlite3

---

您不应将database.yml提交到heroku：

When Rails applications are deployed to Heroku a database.yml file is
automatically generated for your application that configures
ActiveRecord to use a PostgreSQL connection and to connect to the
database located at DATABASE_URL. This behavior is only needed up to
Rails 4.1. Any later version contains direct support for specifying a
connection URL and configuration in the database.yml so we do not have
to overwrite it.

---

阅读相关内容。

我怎么能不提交此文件？请将您的database.yml重命名为其他文件。将更改提交到您的存储库中。这将使你的heroku应用程序正常工作。在根文件夹中有一个.gitignore文件。编辑此文件并将/config/database.yml添加到其中。在修改.gitignore之后，您可以将该文件重命名回database.yml，因为现在它被git忽略了。您可以根据需要为它提供扩展名。请记住，在将更改提交给heroku并将这一行/config/database.yml添加到.gitignore中后，将其发回database.yml。为了让应用程序在本地机器上工作，您必须这样做。它只会在Rails 5上进行引导循环

When Rails applications are deployed to Heroku a database.yml file is
automatically generated for your application that configures
ActiveRecord to use a PostgreSQL connection and to connect to the
database located at DATABASE_URL. This behavior is only needed up to
Rails 4.1. Any later version contains direct support for specifying a
connection URL and configuration in the database.yml so we do not have
to overwrite it.