如何在play framework2.5的特征中正确注入DBApi？

Question

I am upgrading to play framework 2.5 and as mentioned by play the following code needs to be with dependency injection

trait DataSource {
  import play.api.Play.current
  def dataSource = DB.getDataSource()}

is it possible to use DI with trait?

Answer 1

No and Yes;).

No because you need at least one Implementation.

If you have one Implementation, the only thing is that it must be a simple Class (not a case class).

class MyDataSource @Inject()(val dataSource: PlayDataSource) extends DataSource 

With @Inject()(...) you can inject whatever you want and for example override stuff from the trait .