JayData "Uncaught RangeError: Maximum call stack size exceeded"

Question

有一个模型，我想通过这样做来记录连接的设备类型：

var connections = DataLayer.context.ConnectionSet.filter(function(item) {
     return item.Id == id;
}, {id: 1});
connections.forEach(function(item) {
     console.log(item.Sender.Device.DeviceType);
});

item.Sender.Device.DeviceType导致此错误：Uncaught RangeError: Maximum call stack size exceeded

这是我的型号：

 $data.Entity.extend('SubliminalData.Connection', {
    'Id': { 'key':true,'type':'Edm.Int32','nullable':false,'computed':true },
    'Sender': { 'type':'SubliminalData.DevicePort','required':true },
    'Receiver': { 'type':'SubliminalData.DevicePort','required':true }
  });
  $data.Entity.extend('SubliminalData.Device', {
    'Id': { 'key':true,'type':'Edm.Int32','nullable':false,'computed':true },
    'DeviceType': { 'type':'Edm.String','nullable':false,'required':true }
  });
  $data.Entity.extend('SubliminalData.Port', {
    'Id': { 'key':true,'type':'Edm.Int32','nullable':false,'computed':true }
  });
  $data.Entity.extend('SubliminalData.DevicePort', {
    'Id': { 'key':true,'type':'Edm.Int32','nullable':false,'computed':true },
    'Device': { 'type':'SubliminalData.Device','required':true },
    'Port': { 'type':'SubliminalData.Port','required':true }
  });

为什么这会给我一个最大调用异常，我该如何修复它？我找不到。

--更新--

我最近一直在努力让它发挥作用，我已经改变了我的模型，这样我就有了向后导航的属性。这现在更有意义了，但现在我有另一个问题。

新型号：

$data.Entity.extend('SubliminalData.Connection', {
    'Id': { 'key':true,'type':'Edm.Int32','nullable':false,'computed':true },
    'Sender': { 'type':'SubliminalData.DevicePort','required':true,'inverseProperty':'SendingConnections' },
    'Receiver': { 'type':'SubliminalData.DevicePort','required':true,'inverseProperty':'ReceivingConnections' }
  });
  $data.Entity.extend('SubliminalData.Device', {
    'Id': { 'key':true,'type':'Edm.Int32','nullable':false,'computed':true },
    'DeviceType': { 'type':'Edm.String','nullable':false,'required':true },
    'DevicePorts': { 'type':'Array','elementType':'SubliminalData.DevicePort','inverseProperty':'Device' }
  });
  $data.Entity.extend('SubliminalData.Port', {
    'Id': { 'key':true,'type':'Edm.Int32','nullable':false,'computed':true },
    'PortType': { 'type':'Edm.String','nullable':false,'required':true },
    'DevicePorts': { 'type':'Array','elementType':'SubliminalData.DevicePort','inverseProperty':'Port' }
  });
  $data.Entity.extend('SubliminalData.DevicePort', {
    'Id': { 'key':true,'type':'Edm.Int32','nullable':false,'computed':true },
    'Device': { 'type':'SubliminalData.Device','required':true,'inverseProperty':'DevicePorts' },
    'Port': { 'type':'SubliminalData.Port','required':true,'inverseProperty':'DevicePorts' },
    'SendingConnections': { 'type':'Array','elementType':'SubliminalData.Connection','inverseProperty':'Sender' },
    'ReceivingConnections': { 'type':'Array','elementType':'SubliminalData.Connection','inverseProperty':'Receiver' }
  });
  $data.EntityContext.extend('DataLayer.SubliminalDataContainer', {
    'ConnectionSet': { type: $data.EntitySet, elementType: SubliminalData.Connection },
    'DeviceSet': { type: $data.EntitySet, elementType: SubliminalData.Device },
    'PortSet': { type: $data.EntitySet, elementType: SubliminalData.Port },
    'DevicePortSet': { type: $data.EntitySet, elementType: SubliminalData.DevicePort }
  });
  $data.generatedContexts = $data.generatedContexts || [];
  $data.generatedContexts.push(DataLayer.SubliminalDataContainer);
  /*Context Instance*/
  DataLayer.context = new DataLayer.SubliminalDataContainer( { name:'oData', oDataServiceHost: 'http://localhost:57703/WcfDataService1.svc' });

我的新问题是：

var connections = DataLayer.context.ConnectionSet.filter(function(item) {
        return item.Id == id;
    }, {id: 1});
connections.forEach(function(item) {
    l(item); //works great!
    l(item.Sender); //undefined :[
});

为什么我的发件人未定义？我以为我理解JayData，但我相信我不理解。

Answer 1

您的代码看起来不错，我们认为您从代码的其他部分得到了这个错误，很可能来自递归函数调用。你能用你的代码创建一个jsfiddle吗？这样我们就可以测试它了？