如何从 Odata Service SAP ui5 读取聚合实体
How to read an aggregated entity from Odata Service SAP ui5
在 OData 模型 V2 中,我正在努力读取模拟服务器的 odata:
我想访问与父实体关联的子实体。
从Open_Station我可以导航to_Order_Header:
[{
"results": [
{
"__metadata": {
"id": "http://WebService/Open_Station(Station='CHE1',Task='5246')",
"uri": "http://WebService/Open_Station(Station='CHE1',Task='5246')",
"type": "cds_zui_check_dialog.Open_StationType"
},
"Station": "CHE1",
"Task": "5246",
"to_Order_Header": {
"__deferred": {
"uri": "http://WebService/Open_Station(Station='CHE1',Task='5246')/to_Order_Header"
}
}
}
]
}
]
然后从 to_Order_Header,我可以导航到 Order_Item 或股票:
[{
"__metadata" : {
"id" : "http://WebService/Order_Header(OrderNumber='00000000100000000853',Station='CHE1',OrderIndicator='')",
"uri" : "http://WebService/Order_Header(OrderNumber='00000000100000000853',Station='CHE1',OrderIndicator='')",
"type" : "cds_zui_check_dialog.Order_HeaderType"
},
"OrderNumber" : "00000000100000000853",
"Station" : "CHE1",
"OrderIndicator" : "",
"to_Order_Items" : {
"__deferred" : {
"uri" : "http://WebService/Order_Header(OrderNumber='00000000100000000853',Station='CHE1',OrderIndicator='')/to_Order_Items"
}
},
"to_Stock" : {
"__deferred" : {
"uri" : "http://WebService/Order_Header(OrderNumber='00000000100000000853',Station='CHE1',OrderIndicator='')/to_Stock"
}
}
]
在我的控制器中,我有一个方法 ReadOdata 读取这样的数据:
ReadOdata: function()
{
var oModel = new sap.ui.model.odata.v2.ODataModel("http://WebService");
return new Promise(function(resolve, reject)
{
oModel.read("Open_Station(Station='CHE1',Task='5246')/to_Order_Header", {
success : function (data) {
resolve(data);
},
error: function (oError) {
reject(oError);
}
});
});
},
我总是遇到这样的失败:
Request failed with status code 404: GET Open_Station(Station='CHE1',Task='5246')/to_Order_Header
- [{"code":404,"message":"Resource not found","persistent":false,"targets":["/Open_Station(Station='CHE1',Task='5246')/to_Order_Header"],"type":"Error"}]
sap.ui.model.odata.ODataMessageParser
我想我想读取关联实体的方式是错误的。请帮助我。
我找到了解决办法。路径注释失败:
而不是写作:
oModel.read("**to_Open_Station**(Station='CHE1',Task='5246')/to_Order_Header", {
我在写:
oModel.read("*Open_Station*(Station='CHE1',Task='5246')/to_Order_Header", {
在元数据中,NavigationProperty 被称为 to_Open_Station。
在 OData 模型 V2 中,我正在努力读取模拟服务器的 odata:
我想访问与父实体关联的子实体。
从Open_Station我可以导航to_Order_Header:
[{
"results": [
{
"__metadata": {
"id": "http://WebService/Open_Station(Station='CHE1',Task='5246')",
"uri": "http://WebService/Open_Station(Station='CHE1',Task='5246')",
"type": "cds_zui_check_dialog.Open_StationType"
},
"Station": "CHE1",
"Task": "5246",
"to_Order_Header": {
"__deferred": {
"uri": "http://WebService/Open_Station(Station='CHE1',Task='5246')/to_Order_Header"
}
}
}
]
}
]
然后从 to_Order_Header,我可以导航到 Order_Item 或股票:
[{
"__metadata" : {
"id" : "http://WebService/Order_Header(OrderNumber='00000000100000000853',Station='CHE1',OrderIndicator='')",
"uri" : "http://WebService/Order_Header(OrderNumber='00000000100000000853',Station='CHE1',OrderIndicator='')",
"type" : "cds_zui_check_dialog.Order_HeaderType"
},
"OrderNumber" : "00000000100000000853",
"Station" : "CHE1",
"OrderIndicator" : "",
"to_Order_Items" : {
"__deferred" : {
"uri" : "http://WebService/Order_Header(OrderNumber='00000000100000000853',Station='CHE1',OrderIndicator='')/to_Order_Items"
}
},
"to_Stock" : {
"__deferred" : {
"uri" : "http://WebService/Order_Header(OrderNumber='00000000100000000853',Station='CHE1',OrderIndicator='')/to_Stock"
}
} ]
在我的控制器中,我有一个方法 ReadOdata 读取这样的数据:
ReadOdata: function()
{
var oModel = new sap.ui.model.odata.v2.ODataModel("http://WebService");
return new Promise(function(resolve, reject)
{
oModel.read("Open_Station(Station='CHE1',Task='5246')/to_Order_Header", {
success : function (data) {
resolve(data);
},
error: function (oError) {
reject(oError);
}
});
});
},
我总是遇到这样的失败:
Request failed with status code 404: GET Open_Station(Station='CHE1',Task='5246')/to_Order_Header
- [{"code":404,"message":"Resource not found","persistent":false,"targets":["/Open_Station(Station='CHE1',Task='5246')/to_Order_Header"],"type":"Error"}]
sap.ui.model.odata.ODataMessageParser
我想我想读取关联实体的方式是错误的。请帮助我。
我找到了解决办法。路径注释失败:
而不是写作:
oModel.read("**to_Open_Station**(Station='CHE1',Task='5246')/to_Order_Header", {
我在写:
oModel.read("*Open_Station*(Station='CHE1',Task='5246')/to_Order_Header", {
在元数据中,NavigationProperty 被称为 to_Open_Station。