resolve_all

# File activerecord/lib/active_record/connection_adapters/connection_specification.rb, line 152
        def resolve_all
          config = configurations.dup

          if env = ActiveRecord::ConnectionHandling::DEFAULT_ENV.call
            env_config = config[env] if config[env].is_a?(Hash) && !(config[env].key?("adapter") || config[env].key?("url"))
          end

          config.reject! { |k, v| v.is_a?(Hash) && !(v.key?("adapter") || v.key?("url")) }
          config.merge! env_config if env_config

          config.each do |key, value|
            config[key] = resolve(value) if value
          end

          config
        end