可能我在这里遗漏了一些基本的东西。场景如下：
在我的应用程序的根视图控制器（App.controller.js，onInit函数）中，我在命名模型上执行一系列读取操作，以便准备好主要供使用的其他数据由后续视图中的格式化程序。我所做的就是使用promises来确保数据准备就绪。
问题是应用程序在根视图之后加载带有模式""（在我的情况下为Worklist.view.xml）的初始视图时偶尔会崩溃（App.view.xml）因为格式化程序功能无法找到预期的数据。添加了几个断点并观察了调试器：
＆＃34;正常＆＃34;当应用程序没有崩溃时，流程如下：
从上述情况来看，我得出的结论是我的承诺不起作用。有什么想法吗？
sap.ui.define([
"kristal/apps/agreements/controller/BaseController",
"sap/ui/model/json/JSONModel"
], function (BaseController, JSONModel) {
"use strict";
/* PROMISE VARIABLES */
var oModelTypeDataDeferred = jQuery.Deferred();
var oModelStatusDataDeferred = jQuery.Deferred();
var oModelRoleDataDeferred = jQuery.Deferred();
var oModelRefDataDeferred = jQuery.Deferred();
var oModelExtOrgDataDeferred = jQuery.Deferred();
var oModelInvolvementDataDeferred = jQuery.Deferred();
return BaseController.extend("kristal.apps.agreements.controller.App", {
onInit: function () {
/* CALLED AFTER PROMISES HAVE BEEN FULFILLED */
var readyToGo = function() {
jQuery.sap.log.error("Ready!");
};
var oViewModel;
var fnSetAppNotBusy;
var iOriginalBusyDelay = this.getView().getBusyIndicatorDelay();
var oViewModel = new JSONModel({
busy: true,
delay: 0
});
this.setModel(oViewModel, "appView");
fnSetAppNotBusy = function() {
oViewModel.setProperty("/busy", false);
oViewModel.setProperty("/delay", iOriginalBusyDelay);
};
this.getOwnerComponent().getModel().metadataLoaded().then(fnSetAppNotBusy);
var oModel = this.getOwnerComponent().getModel("f4");
/* oData READ OPS */
oModel.metadataLoaded().then(function(){
// Initialize additional data
var sPath = "/Agreement_TypesSet";
oModel.read(sPath, {
success: function(oData, oResponse) {
oModelTypeDataDeferred.resolve();
},
error: function(oError) {
jQuery.sap.log.error("Error", oError);
}
});
sPath = "/Agreement_StatusesSet";
oModel.read(sPath, {
success: function(oData, oResponse) {
oModelStatusDataDeferred.resolve();
},
error: function(oError) {
jQuery.sap.log.error("Error", oError);
}
});
sPath = "/Role_TypesSet";
oModel.read(sPath, {
success: function(oData, oResponse) {
oModelRoleDataDeferred.resolve();
},
error: function(oError) {
jQuery.sap.log.error("Error", oError);
}
});
sPath = "/Reference_TypesSet";
oModel.read(sPath, {
success: function(oData, oResponse) {
oModelRefDataDeferred.resolve();
},
error: function(oError) {
jQuery.sap.log.error("Error", oError);
}
});
sPath = "/External_OrganizationsSet";
oModel.read(sPath, {
success: function(oData, oResponse) {
oModelRefDataDeferred.resolve();
},
error: function(oError) {
jQuery.sap.log.error("Error", oError);
}
});
sPath = "/Involvement_TypesSet";
oModel.read(sPath, {
success: function(oData, oResponse) {
oModelInvolvementDataDeferred.resolve();
},
error: function(oError) {
jQuery.sap.log.error("Error", oError);
}
});
/* IF ALL PROMISES FULFILLED, PROCEED */
jQuery.when(oModelTypeDataDeferred, oModelStatusDataDeferred, oModelRoleDataDeferred, oModelRefDataDeferred, oModelExtOrgDataDeferred, oModelInvolvementDataDeferred)
.done().then(jQuery.proxy(readyToGo, this));
},
// ...
});
});
的manifest.json：
{
"_version": "1.4.0",
"sap.app": {
"id": "kristal.apps.agreements",
"type": "application",
"i18n": "i18n/i18n.properties",
"title": "{{appTitle}}",
"description": "{{appDescription}}",
"applicationVersion": {
"version": "1.0.0"
},
"dataSources": {
"mainService": {
"uri": "/DEV/sap/opu/odata/SAP/ZCONTRACTS_SRV/",
"type": "OData",
"settings": {
"odataVersion": "2.0",
"localUri": "localService/metadata.xml"
}
}
},
"sourceTemplate": {
"id": "sap.ui.ui5-template-plugin.1worklist",
"version": "1.38.3"
}
},
"sap.ui": {
"technology": "UI5",
"icons": {
"icon": "sap-icon://task",
"favIcon": "",
"phone": "",
"phone@2": "",
"tablet": "",
"tablet@2": ""
},
"deviceTypes": {
"desktop": true,
"tablet": true,
"phone": true
},
"supportedThemes": [
"sap_hcb",
"sap_bluecrystal"
]
},
"sap.ui5": {
"rootView": {
"viewName": "kristal.apps.agreements.view.App",
"type": "XML",
"id": "app",
"async": true
},
"dependencies": {
"minUI5Version": "1.38.0",
"libs": {
"sap.ui.core": {
"minVersion": "1.38.0"
},
"sap.m": {
"minVersion": "1.38.0"
},
"sap.ushell": {
"minVersion": "1.38.0"
},
"sap.collaboration": {
"minVersion": "1.38",
"lazy": true
}
}
},
"contentDensities": {
"compact": true,
"cozy": true
},
"models": {
"i18n": {
"type": "sap.ui.model.resource.ResourceModel",
"settings": {
"bundleName": "kristal.apps.agreements.i18n.i18n"
}
},
"": {
"dataSource": "mainService",
"preload": true,
"settings": {
"defaultBindingMode": "TwoWay"
}
},
"f4": {
"dataSource": "mainService",
"preload": true,
"settings": {
"metadataUrlParams": {
"sap-documentation": "heading"
},
"defaultBindingMode": "TwoWay"
}
}
},
"routing": {
"config": {
"routerClass": "sap.m.routing.Router",
"viewType": "XML",
"viewPath": "kristal.apps.agreements.view",
"controlId": "app",
"controlAggregation": "pages",
"bypassed": {
"target": [
"notFound"
]
},
"async": true
},
"routes": [{
"pattern": "",
"name": "worklist",
"target": [
"worklist"
]
}, {
"pattern": "AgreementsSet/{objectId}",
"name": "object",
"target": [
"object"
]
}],
"targets": {
"worklist": {
"viewName": "Worklist",
"viewId": "worklist",
"viewLevel": 1
},
"object": {
"viewName": "Object",
"viewId": "object",
"viewLevel": 2
},
"objectNotFound": {
"viewName": "ObjectNotFound",
"viewId": "objectNotFound"
},
"notFound": {
"viewName": "NotFound",
"viewId": "notFound"
}
}
}
},
"sap.platform.abap": {
"uri": "/sap/bc/ui5_ui5/sap/zctr_contr_mnt/webapp",
"_version": "1.1.0"
}
}
Component.js
sap.ui.define([
"sap/ui/core/UIComponent",
"sap/ui/Device",
"kristal/apps/agreements/model/models",
"kristal/apps/agreements/controller/ErrorHandler"
], function(UIComponent, Device, models, ErrorHandler) {
"use strict";
return UIComponent.extend("kristal.apps.agreements.Component", {
metadata: {
manifest: "json"
},
init: function() {
UIComponent.prototype.init.apply(this, arguments);
this._oErrorHandler = new ErrorHandler(this);
this.setModel(models.createDeviceModel(), "device");
this.setModel(models.createFLPModel(), "FLP");
this.getRouter().initialize();
},
destroy: function() {
this._oErrorHandler.destroy();
// call the base component's destroy function
UIComponent.prototype.destroy.apply(this, arguments);
},
getContentDensityClass: function() {
if (this._sContentDensityClass === undefined) {
// check whether FLP has already set the content density class; do nothing in this case
if (jQuery(document.body).hasClass("sapUiSizeCozy") || jQuery(document.body).hasClass("sapUiSizeCompact")) {
this._sContentDensityClass = "";
} else if (!Device.support.touch) { // apply "compact" mode if touch is not supported
this._sContentDensityClass = "sapUiSizeCompact";
} else {
// "cozy" in case of touch support; default for most sap.m controls, but needed for desktop-first controls like sap.ui.table.Table
this._sContentDensityClass = "sapUiSizeCozy";
}
}
return this._sContentDensityClass;
}
});
});