没有为 `MessagesApi` 找到符合条件的 bean

Question

我已将messagesApi 作为documented (Play 2.4.x) 注入到我的控制器中：

@Scope(value = "singleton")
@Component
class MyController @Inject()(val messagesApi: MessagesApi) extends Controller with I18nSupport

但在启动时：

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [play.api.i18n.MessagesApi] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}

Answer 1

您需要使用BaseController 或InjectedController 扩展您的控制器；所以你的代码将是：

class MyController @Inject()(val messagesApi: MessagesApi) extends InjectedController with I18nSupport{}

欲了解更多详情，您可以查看 Play 的documents。