Question

我在调试这个并获得解决方案时遇到了一些麻烦。

我的数据正确地返回给我，但是当我在'loadexception'函数上设置断点时，它会抛弃TypeError。这是错误：

description - “'prototype'为null或不是对象” 消息 - “'prototype'为null或不是对象” 名称 - “TypeError” 号码 - -2146823281

因此即使我的数据正确回归，我的callbox消息框也总是被错误引发。

V2020.dsPricing = new Ext.data.JsonStore({
        proxy: new Ext.data.HttpProxy({
        method: 'POST',
        url: url,
        headers: {"Content-Type": "application/json; charset=utf-8"},
        jsonData: Ext.util.JSON.encode({ serviceId: objPricingReturn.serviceId })
        }),
        reader: PricingJsonReader()
    });       

    V2020.dsPricing.on('loadexception', function(obj, options, response, err) {
        Ext.MessageBox.show({
            title: 'Error',
            msg: url + ' POST method fail...ErrorCode:' + response.status,
            buttons: Ext.MessageBox.OK,
            icon: Ext.MessageBox.ERROR
        });
    });

    V2020.dsPricing.load({
        callback: function(records, o, s) {
            if (!s) Ext.MessageBox.show({
                title: 'Error',
                msg: ' Failed to load pricing data',
                buttons: Ext.MessageBox.OK,
                icon: Ext.MessageBox.ERROR
            });
        }
    });

这是JsonReader代码

function PricingJsonReader() {
        var pricingReaderObject = new Ext.data.JsonReader({
            root: 'GetServicePriceByIdResult.ServicePricing',
            fields: [{
                name: 'priceId',
                type: 'int'
            },
        {
            name: 'serviceId',
            type: 'int'
        },
        {
            name: 'price',
            type: 'float'
        },
        {
            name: 'startDate',
            type: 'date',
            dateFormat: 'n/j/Y'
        },
        {
            name: 'endDate',
            type: 'date',
            dateFormat: 'n/j/Y'
        },
        {
            name: 'updatedBy',
            type: 'string'
        },
        {
            name: 'updateDate',
            type: 'date',
            dateFormat: 'n/j/Y'
        }]
        })
        return pricingReaderObject;
    }

回应（我认为这就是你所要求的）

{"GetServicePriceByIdResult":{"ServicePricing":[{"priceId":14,"serviceId":1,"price":70.0000,"startDate":"6\/14\/2010 12:00:00 AM","endDate":"12\/31\/2011 12:00:00 AM","updatedBy":null,"updateDate":null},{"priceId":142,"serviceId":1,"price":70.0000,"startDate":"6\/14\/2010 12:00:00 AM","endDate":"12\/31\/2011 12:00:00 AM","updatedBy":null,"updateDate":null}]}}

Answer 1

你正在使用JsonStore＆amp;将读者对象传递给它但jsonStore获取JsonReader＆amp;的配置。创造一个读者本身。你有两个选择：

将Ext.data.Store用于V2020.dsPricing
将JsonReader的配置移动到JsonStore＆amp;不要再将读者传递给JsonStore

解决方案1：

var url = "http://localhost/r.json";
objPricingReturn = {serviceId:10};

function PricingJsonReader() {
        var pricingReaderObject = new Ext.data.JsonReader({
            root: 'GetServicePriceByIdResult.ServicePricing',
            fields: [{
                name: 'priceId',
                type: 'int'
            },
        {
            name: 'serviceId',
            type: 'int'
        },
        {
            name: 'price',
            type: 'float'
        },
        {
            name: 'startDate',
            type: 'date',
            dateFormat: 'n/j/Y'
        },
        {
            name: 'endDate',
            type: 'date',
            dateFormat: 'n/j/Y'
        },
        {
            name: 'updatedBy',
            type: 'string'
        },
        {
            name: 'updateDate',
            type: 'date',
            dateFormat: 'n/j/Y'
        }]
        })
        return pricingReaderObject;
    }


V2020 = {};
V2020.dsPricing = new Ext.data.Store({
        proxy: new Ext.data.HttpProxy({
        method: 'POST',
        url: url,
        headers: {"Content-Type": "application/json; charset=utf-8"},
        jsonData: Ext.util.JSON.encode({ serviceId: objPricingReturn.serviceId })
        }),
        reader: PricingJsonReader()
    });       

    V2020.dsPricing.on('loadexception', function(obj, options, response, err) {
        Ext.MessageBox.show({
            title: 'Error',
            msg: url + ' POST method fail...ErrorCode:' + response.status,
            buttons: Ext.MessageBox.OK,
            icon: Ext.MessageBox.ERROR
        });
    });

    V2020.dsPricing.load({
        callback: function(records, o, s) {
            if (!s) Ext.MessageBox.show({
                title: 'Error',
                msg: ' Failed to load pricing data',
                buttons: Ext.MessageBox.OK,
                icon: Ext.MessageBox.ERROR
            });
        }
    });

ExtJS - 错误状态'ProtoType'为null或不是对象

1 个答案: