关于前端:SAP-UI5-ODataModelcreateEntry-单步调试

办法入口：

initOData: function(){function mySuccessHandler(){debugger;}
         function myErrorHandler(){debugger;}
         var oModel = new ODataModel("http://localhost:8089/Northwind/Northwind.svc/");
         var oMetadata = oModel.getServiceMetadata();
         var result = oModel.getProperty("/Customer('ALFKI')/Address");
  var oContext = oModel.createEntry("/Customers", {properties : {Name : "Laptop X", Description:"New Laptop", Price:"1000", CurrencyCode : "USD"}
         debugger;

第一个参数为 entitySet 名称，第二个参数为待创立的 entry payload：

须要在 metadata 加载结束之后，能力调用 createEntry 办法。

批改之后的代码：

sap.ui.define([
    "sap/ui/core/UIComponent",
    "sap/ui/model/json/JSONModel",
    "sap/ui/model/resource/ResourceModel",
    "sap/ui/model/odata/v2/ODataModel"
 ], function (UIComponent, JSONModel, ResourceModel,ODataModel) {
    "use strict";

    return UIComponent.extend("sap.ui5.walkthrough.Component", {
       metadata : {"interfaces": ["sap.ui.core.IAsyncContentCreation"],
          "rootView": {
             "viewName": "sap.ui5.walkthrough.view.App",
             "type": "XML",
             "id": "app"
          }
       },
       initOData: function(){function mySuccessHandler(){debugger;}
         function myErrorHandler(){debugger;}
         function myLoaded(oEvent){
            debugger;
            var oContext = oModel.createEntry("/Customers", {properties : {Name : "Laptop X", Description:"New Laptop", Price:"1000", CurrencyCode : "USD"}});

            oModel.submitChanges({success: mySuccessHandler, error: myErrorHandler});
        // handle successful creation or reset
        oContext.created().then(function () {/* successful creation */},
          function () { /* deletion of the created entity before it is persisted */}
        );
         }
         var oModel = new ODataModel("http://localhost:8089/Northwind/Northwind.svc/");
         var oData = {name:'Jerry'};
         
         oModel.attachMetadataLoaded(oData, myLoaded);

         var oMetadata = oModel.getServiceMetadata();

         var result = oModel.getProperty("/Customer('ALFKI')/Address");

         debugger;
         
        // bind a form against the transient context for the newly created entity
        // oForm.setBindingContext(oContext);
         
        // submit the changes: creates entity in the back end
        
         
       },
       init : function () {UIComponent.prototype.init.apply(this, arguments);
          this.initOData();
          var oData = {
             recipient : {name : "SAP UI5 初学者教程之九 - 创立第一个 Component"}
          };
          var oModel = new JSONModel(oData);
          this.setModel(oModel);
 
          var i18nModel = new ResourceModel({bundleName: "sap.ui5.walkthrough.i18n.i18n"});
          this.setModel(i18nModel, "i18n");
       }
    });
 });

当初 metadata 处于胜利加载状态，执行 create 函数：

失去 entityType：

this.mChangeGroups 里有一个默认的 change group：

应用默认的 changes group：

生成一个 dummy 的 uid？

submit change：

执行异步队列：

这个 batch 申请什么时候生成的？

HTTP 202 状态码代表的意思是 申请已被承受，但尚未解决，即 HTTP 202 Accepted 响应状态。

这个状态码表明客户端发动的申请，可能会被服务器端解决，也可能会被回绝，实用于 异步操作场合，容许服务器承受其余过程申请，而不必让客户端始终放弃与服务器的连贯直至批处理操作全副实现。

应用 Postman 给 Northwind 发送 HTTP post 申请创立 customers 的 script：

url：https://services.odata.org/V2…$batch

content-type：multipart/mixed;boundary=batch_23c4-3627-5005

body：

--batch_23c4-3627-5005
Content-Type: multipart/mixed; boundary=changeset_6ddc-5df2-c1a1

--changeset_6ddc-5df2-c1a1
Content-Type: application/http
Content-Transfer-Encoding: binary

POST Customers HTTP/1.1
Content-Type: application/json
Content-ID: id-1664894186776-9
sap-contextid-accept: header
Accept: application/json
Accept-Language: en-US
DataServiceVersion: 2.0
MaxDataServiceVersion: 2.0
Content-Length: 130

{"Name":"Laptop X","Description":"New Laptop","Price":"1000","CurrencyCode":"USD","__metadata":{"type":"NorthwindModel.Customer"}}
--changeset_6ddc-5df2-c1a1--

--batch_23c4-3627-5005--

发送之后，收到 HTTP 202 Accepted 的响应：