我有一个格式正确的 JSON 文件，因为当我将它加载到在线 JSON 查看器中时，树会呈现：
现在我想使用 Sencha ExtJS 做类似的事情，但较低的级别不呈现：
即使我将所有节点重命名为“children”，问题也是一样的。当我尝试扩展树的第二级时，从萤火虫中出现此错误：
TypeError: records[i] is undefined
ns[i].viewRecordId = records[i].internalId;
ext-all-debug.js (line 60517)
错误是什么意思？我的代码是
/*
* File: app/controller/CheckNode.js
*
* This file was generated by Sencha Architect version 2.2.3.
* http://www.sencha.com/products/architect/
*
* This file requires use of the Ext JS 4.0.x library, under independent license.
* License of Sencha Architect does not include license for Ext JS 4.0.x. For more
* details see http://www.sencha.com/license or contact license@sencha.com.
*
* This file will be auto-generated each and everytime you save your project.
*
* Do NOT hand edit this file.
*/
Ext.define('MyApp.controller.CheckNode', {
extend: 'Ext.app.Controller',
models: [
'CheckNode'
],
stores: [
'CheckNodes'
],
views: [
'CheckedNodeTree'
],
refs: [
{
ref: 'checkedTree',
selector: 'checkedtree'
}
],
onButtonClick: function(button, e, eOpts) {
var records = this.getCheckedTree().getView().getChecked(),
names = [];
Ext.Array.each(records, function(rec){
names.push(rec.get('text'));
});
Ext.MessageBox.show({
title: 'TODO',
msg: names.join('<br />Not implemented'),
icon: Ext.MessageBox.INFO
});
},
init: function(application) {
this.control({
"button[action='getCheckedNodes']": {
click: this.onButtonClick
}
});
}
});
/*
* File: app/model/CheckNode.js
*
* This file was generated by Sencha Architect version 2.2.3.
* http://www.sencha.com/products/architect/
*
* This file requires use of the Ext JS 4.0.x library, under independent license.
* License of Sencha Architect does not include license for Ext JS 4.0.x. For more
* details see http://www.sencha.com/license or contact license@sencha.com.
*
* This file will be auto-generated each and everytime you save your project.
*
* Do NOT hand edit this file.
*/
Ext.define('MyApp.model.CheckNode', {
extend: 'Ext.data.Model',
fields: [
{
name: 'name'
}
]
});
/*
* File: app/store/CheckNodes.js
*
* This file was generated by Sencha Architect version 2.2.3.
* http://www.sencha.com/products/architect/
*
* This file requires use of the Ext JS 4.0.x library, under independent license.
* License of Sencha Architect does not include license for Ext JS 4.0.x. For more
* details see http://www.sencha.com/license or contact license@sencha.com.
*
* This file will be auto-generated each and everytime you save your project.
*
* Do NOT hand edit this file.
*/
Ext.define('MyApp.store.CheckNodes', {
extend: 'Ext.data.TreeStore',
requires: [
'MyApp.model.CheckNode'
],
constructor: function(cfg) {
var me = this;
cfg = cfg || {};
me.callParent([Ext.apply({
autoLoad: true,
model: 'MyApp.model.CheckNode',
storeId: 'CheckNodes',
proxy: {
type: 'ajax',
url: 'data/tree.json'
}
}, cfg)]);
}
});
/*
* File: app/view/CheckedNodeTree.js
*
* This file was generated by Sencha Architect version 2.2.3.
* http://www.sencha.com/products/architect/
*
* This file requires use of the Ext JS 4.0.x library, under independent license.
* License of Sencha Architect does not include license for Ext JS 4.0.x. For more
* details see http://www.sencha.com/license or contact license@sencha.com.
*
* This file will be auto-generated each and everytime you save your project.
*
* Do NOT hand edit this file.
*/
Ext.define('MyApp.view.CheckedNodeTree', {
extend: 'Ext.tree.Panel',
alias: 'widget.checkedtree',
frame: true,
height: 400,
width: 640,
title: 'Product Offerings',
store: 'CheckNodes',
displayField: 'name',
lines: false,
rootVisible: false,
initComponent: function() {
var me = this;
Ext.applyIf(me, {
viewConfig: {
},
dockedItems: [
{
xtype: 'toolbar',
dock: 'top',
items: [
{
xtype: 'button',
action: 'getCheckedNodes',
text: 'Add new'
}
]
}
]
});
me.callParent(arguments);
}
});
/*
* File: app/view/Viewport.js
*
* This file was generated by Sencha Architect version 2.2.3.
* http://www.sencha.com/products/architect/
*
* This file requires use of the Ext JS 4.0.x library, under independent license.
* License of Sencha Architect does not include license for Ext JS 4.0.x. For more
* details see http://www.sencha.com/license or contact license@sencha.com.
*
* This file will be auto-generated each and everytime you save your project.
*
* Do NOT hand edit this file.
*/
Ext.define('MyApp.view.Viewport', {
extend: 'MyApp.view.CheckedNodeTree',
renderTo: Ext.getBody()
});
JSON文件的开头是
{"productOfferings":[{"@class":"BundledProductOffering","id":26,"name":"Mobile subscription with Internet access 2GB and iPad 32GB","description":"Joors 2GB mobile broadband and iPad 32GB","status":null,"brand":{"id":"Joors SE"},"validFor":{"startDateTime":1382514501359,"endDateTime":null},"productOfferings":[{"@class":"SimpleProductOffering","id":5,"name":"Ipad with 32 GB storage","description":"A iPad 32 GB Product Offering","status":"active","brand":{"id":"Joors SE"},"validFor":{"startDateTime":1382514501222,"endDateTime":null},"productSpecification":{"@class":"MobileProductSpecification","id":5,"name":"IPad","description":"","productNumber":"1234567","validFor":{"startDateTime":1382514501111,"endDateTime":null},"brand":{"id":"Joors SE"},"characteristics":null,"resourceSpecification":{"@class":"PhysicalDeviceSpecification","id":13,"resourceCapacity":null,"logicalResourceSpecification":null,"modelNumber":"A1460","partNumber":null,"skuNumber":null,"vendorName":"Apple","tags":[{"name":"hardware","value":"IPad"},{"name":"hardwareCategory","value":"tablet"},{"name":"hardwareBrand","value":"Apple"}],"descriptorId":null,"characteristics":[{"id":1,"name":"Color","description":null,"minCardinality":null,"maxCardinality":null,"validFor":null,"values":[{"valueType":"COLOR","defaultValue":false,"value":"WHITE","valueFrom":null,"valueTo":null,"unitOfMeasure":null,"validFor":{"startDateTime":1382514500714,"endDateTime":null}},{"valueType":"COLOR","defaultValue":false,"value":"BLACK","valueFrom":null,"valueTo":null,"unitOfMeasure":null,"validFor":{"startDateTime":1382514500713,"endDateTime":null}}],"valueType":null,"descriptorId":null},{"id":2,"name":"Storage size","description":null,"minCardinality":null,"maxCardinality":null,"validFor":null,"values":[{"valueType":"INTEGER","defaultValue":false,"value":"32","valueFrom":null,"valueTo":null,"unitOfMeasure":"GB","validFor":{"startDateTime":1382514500745,"endDateTime":null}},{"valueType":"INTEGER","defaultValue":false,"value":"16","valueFrom":null,"valueTo":null,"unitOfMeasure":"GB","validFor":{"startDateTime":1382514500745,"endDateTime":null}}],"valueType":null,"descriptorId":null}]},"serviceSpecification":null,"lifecycleStatus":null,"mobileNetworkOperator":{"id":2,"name":"Tele2 Sweden","mobileCountryCode":"240","mobileNetworkCode":"07","issuerIdentificationNumber":"894607","country":{"name":"Sweden","code":"SE"}},"tags":null,"descriptorId":null},"descriptorId":null,"tags":null,"productOfferingPrice":{"@class":"ProductOfferingPriceChargeDto","id":4,"description":"The price when buying a iPad with 32 GB memory together with a subscription","name":"iPad 32 GB product offering price","validFor":{"startDateTime":1382514501222,"endDateTime":null},"productSpecificationId":5,"productSpecificationCharacteristicValueUse":null,"resourceSpecificationCharacteristicValueUse":{"productOfferingReference":{"id":5,"name":"Ipad with 32 GB storage","sortOrder":null},"productSpecificationReference":{"id":5,"name":"IPad","sortOrder":null},"resourceSpecificationReference":{"id":13,"name":"iPad with Retina","sortOrder":null},"resourceSpecificationCharacteristicReference":{"id":2,"name":"Storage size","sortOrder":null},"resourceSpecificationCharacteristicValueDto":{"valueType":"INTEGER","defaultValue":false,"value":"32","valueFrom":null,"valueTo":null,"unitOfMeasure":"GB","validFor":{"startDateTime":1382514500745,"endDateTime":null}}},"serviceSpecificationCharacteristicValueUse":null,"money":{"amount":6890.00,"currency":"SEK"},"unitOfMeasure":{"amount":1,"units":"PIECE"}}},{"@class":"SimpleProductOffering","id":8,"name":"Mobile subscription with Sim Card and Internet access 2GB","description":"Mobile subscription with Sim Card and Internet access 2GB","status":"active","brand":{"id":"Joors SE"},"validFor":{"startDateTime":1382514501068,"endDateTime":null},"productSpecification":{"@class":"ProductSpecificationComposite","id":9,"name":"Mobile subscription with sim card and Internet access","description":"Mobile subscription with sim card and Internet access","productNumber":null,"validFor":{"startDateTime":1382514501068,"endDateTime":null},"brand":{"id":"Joors SE"},"characteristics":null,"resourceSpecification":null,"serviceSpecification":null,"productSpecifications":[{"@class":"MobileTelephonyProductSpecification","id":2,"name":"Mobile subscription with Sim Card","description":"This is the classic Subscription product of a Mobile Network totally void of Services, so it can only be used for accessing a HPLMN. Simply put a MSISDN + SIM","productNumber":null,"validFor":{"startDateTime":1382514501068,"endDateTime":null},"brand":{"id":"Joors SE"},"characteristics":null,"resourceSpecification":{"@class":"CompoundResourceSpecificationDto","id":15,"characteristics":null,"resourceSpecifications":[{"@class":"PhysicalSimCardResourceSpecification","id":1,"resourceCapacity":null,"logicalResourceSpecification":null,"modelNumber":null,"partNumber":"163","skuNumber":null,"vendorName":"Stralfors","name":"Sim Card","cardCarrier":"full-size","format":"Full size sim","uiccPartNumber":"","tags":null,"descriptorId":null,"characteristics":[]},{"@class":"MsisdnResourceSpecification","id":11,"resourceCapacity":null,"characteristics":[],"msisdnRegExp":".*","tags":null,"descriptorId":null}],"tags":null,"descriptorId":null,"resourceCapacity":null},"serviceSpecification":null,"lifecycleStatus":"active","mobileNetworkOperator":{"id":2,"name":"Tele2 Sweden","mobileCountryCode":"240","mobileNetworkCode":"07","issuerIdentificationNumber":"894607","country":{"name":"Sweden","code":"SE"}},"tags":[{"name":"subscription","value":"standard"}],"descriptorId":null},{"@class":"MobileProductSpecification","id":4,"name":"Mobile Internet access","description":"This is a GPRS Service for a Mobile Network Access Product for accessing Internet","productNumber":null,"validFor":{"startDateTime":1382514501106,"endDateTime":null},"brand":{"id":"Joors SE"},"characteristics":null,"resourceSpecification":null,"serviceSpecification":{"@class":"CompositeServiceSpecification","id":null,"name":"Joors Packet Data Access Service","description":null,"characteristics":null,"tags":null,"version":1,"serviceSpecifications":[{"@class":"MobilePacketDataNetworkAccessServiceSpecificationAtomic","id":1,"name":"Joors Domain Packet Data Access Service","description":null,"characteristics":[{"id":1,"name":"Quality of service max bandwidth","description":"Quality of service max bandwidth","minCardinality":null,"maxCardinality":null,"validFor":null,"values":[{"valueType":"FLOAT","defaultValue":false,"value":"10.0","valueFrom":null,"valueTo":null,"unitOfMeasure":"MBPS","validFor":null}],"valueType":"FLOAT","descriptorId":null}],"tags":null,"version":1,"sourceNetwork":"HPLMN","destinationNetwork":"joors.com","descriptorId":null,"mobileNetworkOperator":{"id":1,"name":"TeliaSoneraSE","mobileCountryCode":"240","mobileNetworkCode":"01","issuerIdentificationNumber":"894601","country":{"name":"Sweden","code":"SE"}}},{"@class":"MobilePacketDataNetworkAccessServiceSpecificationAtomic","id":2,"name":"Default Packet Data Access Service","description":null,"characteristics":[{"id":1,"name":"Quality of service max bandwidth","description":"Quality of service max bandwidth","minCardinality":null,"maxCardinality":null,"validFor":null,"values":[{"valueType":"FLOAT","defaultValue":false,"value":"10.0","valueFrom":null,"valueTo":null,"unitOfMeasure":"MBPS","validFor":null}],"valueType":"FLOAT","descriptorId":null}],"tags":null,"version":1,"sourceNetwork":"HPLMN","destinationNetwork":"*","descriptorId":null,"mobileNetworkOperator":{"id":1,"name":"TeliaSoneraSE","mobileCountryCode":"240","mobileNetworkCode":"01","issuerIdentificationNumber":"894601","country":{"name":"Sweden","code":"SE"}}},{"@class":"MobilePacketDataNetworkAccessServiceSpecificationAtomic","id":3,"name":"Fallback Packet Data Access Service","description":null,"characteristics":[{"id":2,"name":"Quality of service min bandwidth","description":"Quality of service min bandwidth","minCardinality":null,"maxCardinality":null,"validFor":null,"values":[{"valueType":"FLOAT","defaultValue":false,"value":"60.0","valueFrom":null,"valueTo":null,"unitOfMeasure":"KBPS","validFor":null}],"valueType":"FLOAT","descriptorId":null}],"tags":null,"version":1,"sourceNetwork":"HPLMN","destinationNetwork":"*","descriptorId":null,"mobileNetworkOperator":{"id":1,"name":"TeliaSoneraSE","mobileCountryCode":"240","mobileNetworkCode":"01","issuerIdentificationNumber":"894601","country":{"name":"Sweden","code":"SE"}}}],"descriptorId":null},"lifecycleStatus":null,"mobileNetworkOperator":{"id":1,"name":"TeliaSoneraSE","mobileCountryCode":"240","mobileNetworkCode":"01","issuerIdentificationNumber":"894601","country":{"name":"Sweden","code":"SE"}},"tags":null,"descriptorId":null}],"lifecycleStatus":"active","tags":null,"descriptorId":null},"descriptorId":null,"tags":null,"productOfferingPrice":{"@class":"CompositeProductOfferingPrice","id":10,"description":"Composite product offering price for Joors subscription with Internet access","name":"Joors subscription with Internet access","validFor":null,"productSpecificationId":null,"productSpecificationCharacteristicValueUse":null,"resourceSpecificationCharacteristicValueUse":null,"serviceSpecificationCharacteristicValueUse":null,"productOfferingPrices":[{"@class":"AllowanceProductOfferingPriceAlteration","id":9,"description":"","name":"Allowance for Joors subscription with 150 MB data and 60 kbps access to any domain","validFor":{"startDateTime":1382514501068,"endDateTime":null},"productSpecificationId":4,"productSpecificationCharacteristicValueUse":null,"resourceSpecificationCharacteristicValueUse":null,"serviceSpecificationCharacteristicValueUse":{"productOfferingReference":{"id":8,"name":"Mobile subscription with Sim Card and Internet access 2GB","sortOrder":null},"productSpecificationReference":{"id":4,"name":"Mobile Internet access","sortOrder":null},"serviceSpecificationReference":{"id":3,"name":"Fallback Packet Data Access Service","sortOrder":null},"serviceSpecificationCharacteristicReference":{"id":2,"name":"Quality of service min bandwidth","sortOrder":null},"serviceSpecificationCharacteristicValueDto":{"valueType":"FLOAT","defaultValue":false,"value":"60.0","valueFrom":null,"valueTo":null,"unitOfMeasure":"KBPS","validFor":null}},"money":{"amount":0.00,"currency":"SEK"},"unitOfMeasure":null},{"@class":"AllowanceProductOfferingPriceAlteration","id":8,"description":"","name":"Allowance for Joors subscription with 2.0 GB data and 10.0 mbps access to any domain","validFor":{"startDateTime":1382514501068,"endDateTime":null},"productSpecificationId":4,"productSpecificationCharacteristicValueUse":null,"resourceSpecificationCharacteristicValueUse":null,"serviceSpecificationCharacteristicValueUse":{"productOfferingReference":{"id":8,"name":"Mobile subscription with Sim Card and Internet access 2GB","sortOrder":null},"productSpecificationReference":{"id":4,"name":"Mobile Internet access","sortOrder":null},"serviceSpecificationReference":{"id":2,"name":"Default Packet Data Access Service","sortOrder":null},"serviceSpecificationCharacteristicReference":{"id":1,"name":"Quality of service max bandwidth","sortOrder":null},"serviceSpecificationCharacteristicValueDto":{"valueType":"FLOAT","defaultValue":false,"value":"10.0","valueFrom":null,"valueTo":null,"unitOfMeasure":"MBPS","validFor":null}},"money":{"amount":0.00,"currency":"SEK"},"unitOfMeasure":null},{"@class":"AllowanceProductOfferingPriceAlteration","id":7,"description":"","name":"Allowance for Joors subscription with unlimited amount of data and access to joors.com and 10.0 mbps quality of service","validFor":{"startDateTime":1382514501068,"endDateTime":null},"productSpecificationId":4,"productSpecificationCharacteristicValueUse":null,"resourceSpecificationCharacteristicValueUse":null,"serviceSpecificationCharacteristicValueUse":{"productOfferingReference":{"id":8,"name":"Mobile subscription with Sim Card and Internet access 2GB","sortOrder":null},"productSpecificationReference":{"id":4,"name":"Mobile Internet access","sortOrder":null},"serviceSpecificationReference":{"id":1,"name":"Joors Domain Packet Data Access Service","sortOrder":null},"serviceSpecificationCharacteristicReference":{"id":1,"name":"Quality of service max bandwidth","sortOrder":null},"serviceSpecificationCharacteristicValueDto":{"valueType":"FLOAT","defaultValue":false,"value":"10.0","valueFrom":null,"valueTo":null,"unitOfMeasure":"MBPS","validFor":null}},"money":{"amount":0.00,"currency":"SEK"},"unitOfMeasure":null}]}}],"descriptorId":{"id":115},"tags":[{"name":"subscription","value":"free"}],"productOfferingPrice":null}]}
当我将上面的 JSON 放入 jsonviewer.stack.hu 时，它会正确呈现一个元素及其子元素，为什么 Sencha 不能做其他工具可以做的事情？
我已经简化了树应该呈现的 JSON，并且我检查了它是否正确：
{
"productOfferings": [
{
"name": "Mobile subscription with Internet access 2GB and iPad 32GB",
"description": "Joors 2GB mobile broadband and iPad 32GB",
"productOfferings": [
{
"id": 5,
"name": "Ipad with 32 GB storage",
"description": "A iPad 32 GB Product Offering",
"productSpecification": {
"id": 5,
"name": "IPad",
"description": ""
}
},
{
"id": 8,
"name": "Mobile subscription with Sim Card and Internet access 2GB",
"description": "Mobile subscription with Sim Card and Internet access 2GB",
"productSpecification": {
"id": 9,
"name": "Mobile subscription with sim card and Internet access",
"description": "Mobile subscription with sim card and Internet access",
"productSpecifications": [
{
"id": 2,
"name": "Mobile subscription with Sim Card",
"description": "This is the classic Subscription product of a Mobile Network totally void of Services, so it can only be used for accessing a HPLMN. Simply put a MSISDN + SIM"
},
{
"id": 4,
"name": "Mobile Internet access",
"description": "This is a GPRS Service for a Mobile Network Access Product for accessing Internet"
}
]
}
}
]
}
]
}
但是上面的内容对于 Sencha 来说仍然太复杂，无法用我的代码进行渲染。为什么这么难？这个小提琴说明了我的问题：http: //jsfiddle.net/niklasro/auBTH/22/