Question

我有一个控制器类，如下所示

class MenuAccessor @Inject()  extends securesocial.core.SecureSocial{
  def findAllMenus(): List[Menu] = {
  MorphiaHelper.datastore.find(classOf[Menu]).order("+order").toList
  }
}

我曾经直接在play 2.3.x中的视图中将其称为

  @for(menu <- MenuAccessor.findAllMenus()) {
                    <li class="@menu.menuliclass">

这是否意味着我必须创建路由才能在Play 2.5中调用它？

Answer 1

Routes will help you only if you want to get a link to the action (i.e. reverse routing).

You want to get data from some static method - then just call it from the template. Something like this (do not forget packages):

object MenuAccessor{
  def findAllMenus(): List[Menu] = {
    MorphiaHelper.datastore.find(classOf[Menu]).order("+order").toList
  }
}

....

@for(menu <- MenuAccessor.findAllMenus()) {
                <li class="@menu.menuliclass">

However, I prefer to pass parameters as it described in the documentation:

@(products: List[Product])

<ul>
@for(p <- products) {
  <li>@p.name ($@p.price)</li>
}
</ul>

Play 2.5 is all about injection, so getting some data from the static objects or function is not a good idea for the future. Better to refactor your code to pass data as parameters into a template.

If you want "to avoid passing parameters everywhere in play2", then look this very good answer How to avoid passing parameters everywhere in play2? (it's old but still usable)

如何在play framework 2.5中的视图中调用控制器类

1 个答案: