rake db:create - rake中止

Question

您好，我正在尝试使用此链接创建一个刮板程序，但我在尝试创建一个db https://towardsdatascience.com/job-board-scraping-with-rails-872c432ed2c8时遇到了困难。

当我尝试在文件夹内部和外部创建rake db:create时，我得到了这个错误，我不确定为什么，非常感谢。我一直在密切关注链接，所以我有所有相同的文件，并确保一切都安装正确。

rake aborted!
ActiveRecord::DatabaseConfigurations::InvalidConfigurationError: 
'{ default =>  }' is not a valid configuration. Expected '' to be a URL string or a Hash.

这是我的database.yml文件

# SQLite. Versions 3.8.0 and up are supported.
#   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: scraper_development

test:
<<: *default
database: scraper_test

production:
<<: *default
url: <%= ENV['DATABASE_URL'] %> 

# 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.

提前感谢大家！

更新

谢谢你的指针，我把database.yml文件缩进了，但我觉得有个错误告诉我要去掉制表符。现在的新问题：

could not connect to server: No such file or directory
Is the server running locally and accepting connections on Unix domain socket "/tmp/.s.PGSQL.5432"?
Couldn't create 'scraper_development' database.
Please check your configuration.

rails aborted!

PG::ConnectionBad: could not connect to server: No such file or directory

Is the server running locally and accepting connections on Unix domain socket "/tmp/.s.PGSQL.5432"

Answer 1

该文件位于YAML format中。子项必须缩进。

default: &default
  adapter: postgresql
  pool: 5
  timeout: 5000

development:
  <<: *default  
  database: scraper_development

Answer 2

您可以在gem文件中添加“gem 'pg'，‘YAML 0.18'，'< 2.0’”，并在>=文件中进行必要的设置。