如何在 kendo.data.Datasource 上获得单一结果

Posted 2023-05-07

【中文标题】如何在 kendo.data.Datasource 上获得单一结果

【英文标题】：How to get Single result on kendo.data.Datasource

【发布时间】：2013-11-03 10:32:28

【问题描述】：

我有这样的 Odata 结果

        "odata.metadata":"https://localhost/DocTalkMobileWebApiOData/odata/$metadata#MasterPatient/@Element","PatUniqueId":"39e713db-6a0e-4e59-bf7b-033f4fc47ad5",  "PatID":null,
"pat_lname":"White","pat_fname":"Peter","pat_mi":"     ","pat_ssn":"270787655","pat_dob":"08/07/1973","pat_sex":"M","pat_status":null,"priInsID":2,"secInsID":1,"PCPID":1,"InternalDrID":1,"EXPID":1,"EXPDate":"","pat_phone":null,"isNew":true,"imported":true,"byWhom":"dt","lastUpdate":"2011-03-30T09:41:57.36","changeStamp":"AAAAAAAAIUE=","address":"","city":"","state":"","zip":"","currentMcp":"","currentVisitCount":-2,"otherId":"543674","pcpName":null,"hasChanges":true,"ProgramSource":null,"mrnID":"","createdBy":null,"createdDate":"2007-10-26T10:16:15","expLocation":null,"ethnicId":1,"prefLanguageId":1,"raceId":1
    

我试图通过 kendo.ui.datasource 得到这个结果：

 newPatient = new kendo.data.DataSource(
        type: 'odata', // <-- Include OData style params on query string.
        transport: 
            read: 
                url: url + '/MasterPatient(guid\'00000000-0000-0000-0000-000000000000\')', // <-- Get data from here
                dataType: "json" // <-- The default was "jsonp"
            ,

            parameterMap: function (options, type) 
                var paramMap = kendo.data.transports.odata.parameterMap(options);

                delete paramMap.$inlinecount; // <-- remove inlinecount parameter.
                delete paramMap.$format; // <-- remove format parameter.

                return paramMap;
            
        ,
        schema: 
            data: function (data)                  
                return data;
            ,
            total: function (data)                  
             return  data['odata.count']
            ,
        
    );
    newPatient.fetch(function () 
        kendo.bind($('#newPatientTab'), newPatient);
    );

但不知道为什么它总是抛出错误：

Uncaught TypeError: Object [object global] has no method 'slice' 

请帮助我。谢谢

【问题讨论】：

Single Result 对你意味着什么？无论 odata 查询如何，此 odata url 是否总是返回一个结果？

@Jayantha 是的，我的意思是这只是一条记录 :)

【参考方案1】：

在 Kendo UI 中，DataSource 仅适用于数组。如果您可以更改服务器响应以发送类似这样的内容

["odata.metadata":"https://localhost/DocTalkMobileWebApiOData/odata/$metadata#MasterPatient/@Element","PatUniqueId":"39e713db-6a0e-4e59-bf7b-033f4fc47ad5","PatID":null,"pat_lname":"White","pat_fname":"Peter","pat_mi":"     ","pat_ssn":"270787655","pat_dob":"08/07/1973","pat_sex":"M","pat_status":null,"priInsID":2,"secInsID":1,"PCPID":1,"InternalDrID":1,"EXPID":1,"EXPDate":"","pat_phone":null,"isNew":true,"imported":true,"byWhom":"dt","lastUpdate":"2011-03-30T09:41:57.36","changeStamp":"AAAAAAAAIUE=","address":"","city":"","state":"","zip":"","currentMcp":"","currentVisitCount":-2,"otherId":"543674","pcpName":null,"hasChanges":true,"ProgramSource":null,"mrnID":"","createdBy":null,"createdDate":"2007-10-26T10:16:15","expLocation":null,"ethnicId":1,"prefLanguageId":1,"raceId":1]

然后它会正常工作。 注：它是数组格式。

或

您可以将单个对象包装到客户端的数组中，在模式的数据函数内部。

schema: 
  data: function(server-response) 
    return [server-response];
  

Kendo 团队应该把更多的时间放在好的文档上。

【讨论】：

是的，它现在工作正常。我找到了另一种实现方式： $.getJSON(url + '/MasterPatient(guid\'00000000-0000-0000-0000-000000000000\')', function (data) newPatient = new kendo.observable(data); kendo.bind($('#newPatientForm'), newPatient); );

使用 guid 调用数据不是一个好主意。这不是通用的。

如果它解决了您的问题，您可以接受答案。不要让问题悬而未决。

【参考方案2】：

这意味着您没有使用支持的 odata 源。在这种情况下，如果您的后端不正确支持 odata，您需要在这里考虑是否真的需要来自客户端的 kendo odata 源。

查看来自 odata url http://services.odata.org/Northwind/Northwind.svc/?$format=json 的回复

它应该在value 字段中返回一个对象数组。 如果您无法更改支持的内容，您可以做的是在 Schema.data 函数中格式化数据

schema: 
        data: function (data)                  
            return [data];
        ,