SAP UI5 - Data Model(TODO)-优快云博客

本文详细介绍了JSONModel的数据结构及其访问路径，并对比了ODataModel的不同版本，重点推荐使用v2版本。同时，文章还讲解了如何声明ODataModel、获取OData服务元数据及如何通过该模型进行CRUD操作。

1. JSON Model

{
    company: {
        name: "Treefish Inc",
        info: {
            employees: 3,
        },
        contacts: [
            {
                name: "Barbara",
                phone: "873"
            },
            {
                name: "Gerry",
                phone: "734"
            },
            {
                name: "Susan",
                phone: "275"
            }
        ]
    }
}

访问路径：

/company/name
/company/info/employees
/company/contacts

2. OData Model

sap.ui.model.odata.ODataModel 不建议使用，使用sap.ui.model.odata.v2.ODataModel替代。

声明OData Model

1 var oModel = new sap.ui.model.odata.v2.ODataModel("http://services.odata.org/Northwind/Northwind.svc/");
2 var oModel = new sap.ui.model.odata.v2.ODataModel({serviceUrl: "http://services.odata.org/Northwind/Northwind.svc"});

获取OData Service metadata:

var oMetadata = oModel.getServiceMetadata();

请求OData Service数据时可以添加额外的信息：

 1 var oModel = new sap.ui.model.odata.v2.ODataModel({ 
 2     serviceUrl: "http://services.odata.org/Northwind/Northwind.svc",    
 3     serviceUrlParams: {
 4         myParam: "value1",
 5         myParam2: "value2"
 6     },
 7     metadataUrlParams: {
 8         myParam: "value1",
 9         myParam2: "value2"
10     }
11 });

请求Service数据时会访问

"http://myserver/MyService.svc/?myParam=value&myParam2=value2"这个路径，
同理请求metadata时也是一样：(TODO)

获取数据：

1 oModel.getData("/Customer('ALFKI')");
2 oModel.getProperty("/Customer('ALFKI')/Address");

var oData = {
    ProductId: 999,
    ProductName: "myProduct"
}

//POST
oModel.create("/Products", oData, {success: mySuccessHandler, error: myErrorHandler});

//GET
oModel.read("/Products(999)", {success: mySuccessHandler, error: myErrorHandler});

//PUT
var oData = {
    ProductId: 999,
    ProductName: "myProductUpdated"
}
oModel.update("/Products(999)", oData, {success: mySuccessHandler, error: myErrorHandler});

//DELETE
oModel.delete("/Products(999)", {success: mySuccessHandler, error: myErrorHandler});