grails - Grails Controller 映射，完全误解

Question

好的，我正在尝试学习grails，但我不了解UrlMappings是如何工作的。

这是我的代码:

package naturalselector

class UrlMappings {

static mappings = {
    "/pleasemapit"(view: '/index')
    "/creatures/" {
      controller = 'NaturalSelectionController'
      action = 'viewCreatures'
    }
    "500"(view:'/error')
    "404"(view:'/notFound')
}
}

Controller 类:

package naturalselector

class NaturalSelectionController {

def viewCreatures() {
  println("HIT viewCreatures")
  List creatures
  6.times { idx ->
    creatures.add(new RandomCreature())
    println creatures.get(idx)
  }
  redirect (view: "/index")
}
}

Controller 位于grails-app \ controllers \ naturalselector \中
网址映射位于同一目录中。

在所有示例中， Controller 均具有小写值。
我不明白是包吗？为什么将 Controller 指定为软件包？
我只想在 Controller 中执行方法，我还不想渲染任何页面，只需重定向回索引即可。谢谢。

Answer 1

Is it a package?

没有。

Why would you specify controller as a package?

你不会的

代替这个...

static mappings = {
    "/pleasemapit"(view: '/index')
    "/creatures/" {
        controller = 'NaturalSelectionController'
        action = 'viewCreatures'
    }
    "500"(view:'/error')
    "404"(view:'/notFound')
}

用这个...

static mappings = {
    "/pleasemapit"(view: '/index')
    "/creatures" {
        controller = 'naturalSelection'
        action = 'viewCreatures'
    }
    "500"(view:'/error')
    "404"(view:'/notFound')
}

或这个...

static mappings = {
    "/pleasemapit"(view: '/index')
    "/creatures"(controller: 'naturalSelection', action: 'viewCreatures')
    "500"(view:'/error')
    "404"(view:'/notFound')
}