Connect Ruby Gem to Rails database

Question

I'm modifying a Ruby Gem to allow it to modify a Rails database via a rake task.

I was able to connect the database and modify its content by passing the database configuration as parameters to the rake task, which then called the ActiveRecord::Base.establish_connection. My question is, how could the Gem connect to the Rails database without having to specify the database configuration as parameters in the rake task.

Cereal · Accepted Answer · 2019-11-13 17:21:46Z

2

Assuming the gem has access to the Rails.application, you can access the database config file with

db_config = Rails.application.config.database_configuration[Rails.env]

If it doesn't, you can parse the file yourself.

db_config = YAML.load(ERB.new(File.read('./config/database.yml')).result)

Once you have your configuration, you can pass it into the connector.

answered Nov 13, 2019 at 17:21

Cereal

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1 Comment

Ben Over a year ago

My gem has access to Rails.application and the first line works well, thank you!

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