Loads and returns the entire raw configuration of database from values
stored in config/database.yml.
# File railties/lib/rails/application/configuration.rb, line 165
def database_configuration
path = paths["config/database"].existent.first
yaml = Pathname.new(path) if path
config = if yaml && yaml.exist?
require "yaml"
require "erb"
loaded_yaml = YAML.load(ERB.new(yaml.read).result) || {}
shared = loaded_yaml.delete("shared")
if shared
loaded_yaml.each do |_k, values|
values.reverse_merge!(shared)
end
end
Hash.new(shared).merge(loaded_yaml)
elsif ENV["DATABASE_URL"]
# Value from ENV['DATABASE_URL'] is set to default database connection
# by Active Record.
{}
else
raise "Could not load database configuration. No such file - #{paths["config/database"].instance_variable_get(:@paths)}"
end
config
rescue Psych::SyntaxError => e
raise "YAML syntax error occurred while parsing #{paths["config/database"].first}. " "Please note that YAML must be consistently indented using spaces. Tabs are not allowed. " "Error: #{e.message}"
rescue => e
raise e, "Cannot load database configuration:\n#{e.message}", e.backtrace
end