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SAP UI5 ODataModel.createEntry 单步调试

时间:2022-10-06 10:00:50浏览次数:56  
标签:function debugger oModel var createEntry UI5 单步 sap Northwind

方法入口:

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,第二个参数为待创建的 entry payload:

需要在 metadata 加载完毕之后,才能调用 createEntry 方法。

修改之后的代码:

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 - 创建第一个 Component"
             }
          };
          var oModel = new JSONModel(oData);
          this.setModel(oModel);
 
          var i18nModel = new ResourceModel({
             bundleName: "sap.ui5.walkthrough.i18n.i18n"
          });
          this.setModel(i18nModel, "i18n");
       }
    });
 });

现在 metadata 处于成功加载状态,执行 create 函数:

得到 entityType:

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

使用默认的 changes group:

生成一个 dummy 的 uid?

submit change:

执行异步队列:

这个 batch 请求什么时候生成的?

HTTP 202 状态码代表的意思是 请求已被接受,但尚未处理,即 HTTP 202 Accepted 响应状态。

这个状态码表明客户端发起的请求,可能会被服务器端处理,也可能会被拒绝,适用于异步操作场合,允许服务器接受其他过程请求,而不用让客户端一直保持与服务器的连接直至批处理操作全部完成。

使用 Postman 给 Northwind 发送 HTTP post 请求创建 customers 的 script:

url:https://services.odata.org/V2/Northwind/Northwind.svc/$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:

标签:function,debugger,oModel,var,createEntry,UI5,单步,sap,Northwind
From: https://blog.51cto.com/jerrywangsap/5733438

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