组件上的 addToMasterFrontAction 失败："object is not an instance of declaring class"

Question

我的用例： 我正在使用基于组件作为模型的视图。在此视图中，我需要一个操作来向列表中添加一个新行。

在model.groovy中声明的组件：

Component('ComposeLoading') {
  //fields
  date_time  'etd'

  //reference
  reference 'offerPlan', ref:'OfferPlan'

  //lists
  list 'loadings', ref:'Loading'
  list 'transportOrders', ref:'TransportOrder'
}

在view.groovy中声明的视图：

border('ComposeTrain.wizard.first.view', model:'ComposeLoading') {
  north {
    form {
      fields {
        propertyView name:'etd'
        propertyView name:'offerPlan'
      }
    }
  }
  center {
    split_horizontal {
      left {
        table(permId:'ComposeLoading.loadings.table',
               model:'ComposeLoading-loadings',
               selectionMode:'MULTIPLE_INTERVAL_CUMULATIVE_SELECTION')
      }
      right {
        split_vertical(cascadingModels:true) {
          top {
            table(permId:'ComposeLoading.transportOrders.table',
                  model:'ComposeLoading-transportOrders')
            {
              actionMap () {
                actionList('TRANSPORT_ORDER') {
                  action(ref:'addToMasterFrontAction')
                }
              }
            }
          }
          bottom {
            table(permId:'ComposeLoading.TransportOrders.loadings.table',
                   model:'TransportOrder-loadings')
          }
        }
      }
    }
  }
}

我的问题： 当我运行应用程序并单击“添加”按钮时，addToMasterFrontAction 失败并显示："object is not an instance of declaring class"

请在堆栈跟踪下方找到：

ERROR <2015-04-24 08:48:44,014> org.jspresso.framework.application.frontend.controller.AbstractFrontendController : An unexpected error occurred for user demo on session 6b2afee4.
java.lang.RuntimeException: java.lang.IllegalArgumentException: object is not an instance of declaring class
  at org.jspresso.framework.util.accessor.bean.BeanCollectionAccessor.addToValue(BeanCollectionAccessor.java:78)
  at org.jspresso.framework.application.backend.action.AbstractAddCollectionToMasterAction.execute(AbstractAddCollectionToMasterAction.java:116)
  at org.jspresso.framework.application.backend.AbstractBackendController.execute(AbstractBackendController.java:393)
  at org.jspresso.framework.application.frontend.controller.AbstractFrontendController.executeBackend(AbstractFrontendController.java:1534)
  at org.jspresso.framework.application.frontend.controller.AbstractFrontendController.execute(AbstractFrontendController.java:574)
  at org.jspresso.framework.application.action.AbstractAction.execute(AbstractAction.java:114)
  at org.jspresso.framework.application.frontend.action.std.AddCollectionToMasterAction.execute(AddCollectionToMasterAction.java:85)
  at org.jspresso.framework.application.frontend.controller.AbstractFrontendController.executeFrontend(AbstractFrontendController.java:1547)
  at org.jspresso.framework.application.frontend.controller.AbstractFrontendController.execute(AbstractFrontendController.java:576)
  at org.jspresso.framework.view.remote.RemoteActionFactory$ActionAdapter.actionPerformed(RemoteActionFactory.java:235)
...

Answer 1

阅读您的视图名称，您似乎在向导操作中使用了它。向导操作并不像您期望的那样使用标准模型（例如 ComposeLoading 组件实例），但它绑定了一个 Map 实例作为其视图的根模型。它对 Jspresso 绑定层是完全透明的，因为它可以在 Java bean（使用访问器）或映射（使用 getXXX() 和 putXXX()）上无差别地操作。

然而，对依赖于模型的集合（如 adToMasterFrontAction 或 removeFromMasterFrontAction）进行操作的标准集合操作不是那么通用并且不能很好地与地图一起使用...这绝对是一个错误我在 Jspresso GitHub 中为此打开了一个 issue。

组件上的 addToMasterFrontAction 失败："object is not an instance of declaring class"

addToMasterFrontAction fails on component : "object is not an instance of declaring class"

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