I am trying to update data in my json model with the help of input provided in my view but i am unable to do so, i want to know is it even possible to do so and if yes kindly provide me with the solution

I am trying to load my json model in two different methods in a view but the model is getting loaded in one place and in other place its showing me undefined and data is not present in it when i debug it
var oModel in onSubmit() is undefined and also push has some problem

I want to perform an update operation on my json data and it should get updated in the json model when i press the save button 
this is my controller
sap.ui.define([
	"sap/ui/core/mvc/Controller"
], function(Controller) {
	"use strict";


	return Controller.extend("workeLibrary.controller.Details", {
		onInit: function() {
			// 	var oModel = new sap.ui.model.json.JSONModel(jQuery.sap.getModulePath("workeLibrary.model", "/books.json"));
			// this.getView().setModel(oModel);
			var oModel = new sap.ui.model.json.JSONModel("model/books.json");
			this.getView().setModel(oModel, "oModelBookdata");


			// var oModel = new sap.ui.model.json.JSONModel("model/books.json");


			this.getOwnerComponent().getRouter().getRoute("Details").attachPatternMatched(this._onRouteMatched, this);
		},
		onAfterRendering: function() {


		},
		_onRouteMatched: function(oEvent) {
			var oArgs, oView;
			oArgs = oEvent.getParameter("arguments").productId;
			oView = this.getView();
			var xyz = this.getView().getModel();
			oView.bindElement({
				path: "/Books/" + oArgs,
				model: "oModelBookdata"
			});
			oView.updateBindings();
		},
		onSubmit: function() {
			var Subm = this.getView().byId("Subm").getText();
			var oModel = new sap.ui.model.json.JSONModel("model/books.json");
			this.getView().setModel(oModel, "oModeldata");
			var eBooks = oModel.getProperty("/Books");
			var eName = this.getView().byId("name").getValue();
			var eAuth = this.getView().byId("auth").getValue();
			var eSeri = this.getView().byId("seri").getValue();
			var eSequ = this.getView().byId("sequ").getValue();
			var eGenr = this.getView().byId("genr").getValue();
			var eInst = this.getView().byId("instk").getValue();
			var eCat = this.getView().byId("cat").getValue();
			var ePric = this.getView().byId("pric").getValue();
			var ePage = this.getView().byId("page").getValue();


			if (Subm === "Save") {


				var objBook = {


					"cat": "",


					"name": "",


					"author": "",


					"series_t": "",


					"sequence_i": "",


					"genre_s": "",


					"inStock": "",


					"price": "",


					"pages_i": ""


				};


				objBook.at = eCat;


				objBook.name = eName;


				objBook.author = eAuth;


				objBook.series_t = eSeri;


				objBook.sequence_i = eSequ;


				objBook.genre_s = eGenr;


				objBook.inStock = eInst;


				objBook.price = ePric;


				objBook.pages_i = ePage;


				eBooks.push(objBook);


				oModel.setProperty("/Books", eBooks);
			} else if (Subm === "Edit") {
				this.getView().byId("name").setEditable(true);
				this.getView().byId("cat").setEditable(true);
				this.getView().byId("auth").setEditable(true);
				this.getView().byId("seri").setEditable(true);
				this.getView().byId("genr").setEditable(true);
				this.getView().byId("sequ").setEditable(true);
				this.getView().byId("instk").setEditable(true);
				this.getView().byId("pric").setEditable(true);
				this.getView().byId("page").setEditable(true);
				this.getView().byId("Subm").setText("Save");


			}


		},


		// _on]RouteMatched: function(oEvent) {
		// 	var productId = oEvent.getParameter("arguments").productId;
		// 	this.getView().bindElement("/products/"+productId);
		// },
		handleNavButtonPress: function() {
			this.getOwnerComponent().getRouter().navTo("List");
		}


	});
});
and this is my view



<mvc:View controllerName="workeLibrary.controller.Details" xmlns:html="http://www.w3.org/1999/xhtml" xmlns:f="sap.ui.layout.form"
	xmlns:mvc="sap.ui.core.mvc" displayBlock="true" xmlns="sap.m">
	<App>
		<pages>
			<Page showNavButton="true" navButtonPress="handleNavButtonPress">
				<content>
					<f:SimpleForm title="Registration Form" editable="true" layout="ResponsiveGridLayout" labelSpanL="3" labelSpanM="3" emptySpanL="4"
						emptySpanM="4">
						<f:content>
							<Label text="Book ID"/>
							<Input id="id" value="{oModelBookdata>id}" editable="false"/>
							<!--<Text text="{oModelBookdata>id}"/>-->
							<Label text="Book Name"/>
							<!--<Text text="{oModelBookdata>name}"/>-->
							<Input id="name" value="{oModelBookdata>name}" editable="false"/>
							<Label text="Book Series"/>
							<!--<Text text="{oModelBookdata>name}"/>-->
							<Input id="seri" value="{oModelBookdata>series_t}" editable="false"/>
							<Label text="Book Genre"/>
							<!--<Text text="{oModelBookdata>name}"/>-->
							<Input id="genr" value="{oModelBookdata>genre_s}" editable="false"/>
							<Label text="Book Category"/>
							<!--<Text text="{oModelBookdata>cat}"/>-->
							<Input id="cat" value="{oModelBookdata>cat}" editable="false"/>
							<Label text="Book Author"/>
							<!--<Text text="{oModelBookdata>author}"/>-->
							<Input id="auth" value="{oModelBookdata>author}" editable="false"/>
							<Label text="Book Sequence"/>
							<!--<Text text="{oModelBookdata>sequence_i}"/>-->
							<Input id="sequ" value="{oModelBookdata>sequence_i}" editable="false"/>
							<Label text="In Stock"/>
							<!--<Text text="{oModelBookdata>inStock}"/>-->
							<Input id="instk" value="{oModelBookdata>inStock}" editable="false"/>
							<Label text="Book Price"/>
							<!--<Text text="{oModelBookdata>price}"/>-->
							<Input id="pric" value="{oModelBookdata>price}" editable="false"/>
							<Label text="Pages"/>
							<!--<Text text="{oModelBookdata>pages_i}"/>-->
							<Input id="page" value="{oModelBookdata>pages_i}" editable="false"/>
						</f:content>
					</f:SimpleForm>
				</content>
				<footer>
					<Bar>
						<contentRight>
							<Button id="Subm" text="Edit" type="Emphasized" press="onSubmit"/>
							</contentRight>
							</Bar>
							</footer>
			</Page>
		</pages>
	</App>
</mvc:View>