method

spec

v5.1.7 - Show latest stable - Class: ActiveRecord::ConnectionAdapters::ConnectionSpecification::Resolver

spec(config)

public

Returns an instance of ConnectionSpecification for a given adapter. Accepts a hash one layer deep that contains all connection information.

Example

config = { "production" => { "host" => "localhost", "database" => "foo", "adapter" => "sqlite3" } }
spec = Resolver.new(config).spec(:production)
spec.adapter_method
# => "sqlite3_connection"
spec.config
# => { "host" => "localhost", "database" => "foo", "adapter" => "sqlite3" }

# File activerecord/lib/active_record/connection_adapters/connection_specification.rb, line 179
        def spec(config)
          spec = resolve(config).symbolize_keys

          raise(AdapterNotSpecified, "database configuration does not specify adapter") unless spec.key?(:adapter)

          path_to_adapter = "active_record/connection_adapters/#{spec[:adapter]}_adapter"
          begin
            require path_to_adapter
          rescue Gem::LoadError => e
            raise Gem::LoadError, "Specified '#{spec[:adapter]}' for database adapter, but the gem is not loaded. Add `gem '#{e.name}'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord)."
          rescue LoadError => e
            raise LoadError, "Could not load '#{path_to_adapter}'. Make sure that the adapter in config/database.yml is valid. If you use an adapter other than 'mysql2', 'postgresql' or 'sqlite3' add the necessary adapter gem to the Gemfile.", e.backtrace
          end

          adapter_method = "#{spec[:adapter]}_connection"

          unless ActiveRecord::Base.respond_to?(adapter_method)
            raise AdapterNotFound, "database configuration specifies nonexistent #{spec.config[:adapter]} adapter"
          end

          ConnectionSpecification.new(spec.delete(:name) || "primary", spec, adapter_method)
        end

spec

Example

Related methods