Establish a connection to another database only in a block?

Question

In a rails application, I have this code in pure ruby :

class LinkCreator
  attr_accessor :animal

  def initialize(animal:)
    @animal = animal
  end

  de         


        

Answer 1

It might help to use an instance variable to store the connection. Something like this:

def connection
  @connection ||= ActiveRecord::Base.establish_connection(
    adapter:  "mysql",
    host:     ENV["MYSQL_HOST"],
    username: ENV["MYSQL_USERNAME"],
    password: ENV["MYSQL_PASSWORD"],
    database: ENV["MYSQL_DB_NAME"]
  ).connection
end

That way the existing connection is retrieved on future connection attempts, rather than establishing a new one.