Simple exercise on o data and sap ui5 application for the basic crud operation sap blogs

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Simple Exercise on OData and
SAP UI5 Application for the basic
CRUD Operation
February 5, 2015 | 16,406 Views |
SAPUI5
SAP Enterprise Portal
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Contents
1.   Introduction
2.   Creation of OData Service
     2.1     Creation of OData Service

Term Explanation
DPC Data Provider Class
MPC Model Provider Class
CRUD Create, Read, Update, Delete
          2.1.1     Prerequisites
          2.1.2     Creation of Data Model
          2.1.3     Generate Run time Objects
          2.1.4     Service Implementation.
          2.1.5     Registration of Service.
3.Consumption of OData Service SAP UI5 application.
     3.1     Consuming OData Service for CRUD operation using UI5
Application.
          3.1.1     Prerequisites
          3.1.2     Creation of SAP UI5 Application.
          3.1.3     Create a Dashboard for Employee details display.
          3.1.4     Popup window for Data Modify.
          3.1.5     Create button for Data Creation.
4.Source code used.
List of Abbreviations/Acronyms
1. Introduction
In the demo we are going to see an example on SAP UI5 application
for CRUD operation using SAP UI5 and OData Operations. This demo
can be split in to two main divisions.

Creation of OData Service
Consuming an OData Service using SAP UI5 application.
2. Creation of OData Service
We are going to create an OData service for the custom Employee Details with
the basic operations Create, Read, Delete and Update (CRUD).
2.1 Creation of OData Service
In this example we are going to see the creation of OData service using the
SAP Gateway Service Builder(SEGW). The OData Service can also be built
by various ways available and we took the Gateway Service Builder
approach here. In this example, the OData has been deployed in the
embedded deployment model where the single system acts as both
Gateway and Backend system.
The below mentioned are the steps are used to create the OData service.
Prerequisite
Creation of Data Model
Generate Runtime Objects
Registration of Service
Service Implementation
2.1.1  Prerequisites
In the prerequisite, we are going to create a transparent table which is going
to act as a back end table and function module for the Create, Read, Update
and Delete (CRUD) operation to be used in this OData creation.
     1. Creation of Table, we will create a Z table with basic employee details.
Once the table is created, please create some entries. Later, these entries will
be displayed in the UI dashboard.

2. Create Function Modules for Create, Read, Update and Delete operation.
Important Note: Create the Function Module as RemoteEnabled Function
Module.
Function Module for Create Operation
Function Module for Read Operation

Function Module for Update Operation
Function Module for Delete Operation

2.1.2  Creation of Data Model
The Data model is used to describe the OData Services which contains Entity,
Properties, and EntitySet and so on.
In this example, we are going to build a OData service using SAP Gateway
Service Builder (SEGW)
     1. Go to Transaction Code: SEGW, which will land you in the Gateway
Service Builder.
     2. Create a Project

3. Once the Project is created, create Entity and EntitySet by the Import
option available
4. Give the Entity, Structure and the EntitySet create option as below. We
are going to use the already created employee table structure here.

     5. Select all the Data source parameters and press Next.
     6. Press Finish to complete the Data Model creation.
Note: There are number of ways to define the Data Model and we have chosen
the import>DDIC structure option here.
     7. The Entity and EntitySet are created now, and we can see the entity type
has been created with reference to the given ABAP Structure.
     8. Once it is added, we have the properties created now as below. Choose
Empid as a Key here, the key also can be defined at the step 6 by marking the

key field as “Is Key”.
2.1.3  Generate Run time Objects
     1. Once all the above activities are completed, generate the run time
objects by pressing the Ctrl+F3 button. This will pop up the below window with
all the option to generate the run time objects.
     2. Once this activity is complete, we have the objects generated as below.
This will generate the Data Provider Class, widely we call it as DPC and Model
Provider Class and this we call it as MPC class.
DPC=> Business Logic for CRUD operation goes here.
MPC=>Data Model Class, where we can see the data model defined.

2.1.4  Service Implementation
In this section, we are going to generate the Business logic using the RFC
Function Module we have created earlier for the CRUD Operations. Instead of
using RFC Function Module, we can also use Business Object Repository. Also
you can use your own custom logic in the DPC_EXT classes for the data
operations.
     1. Go to Service Implementation, select the Create Operation and go to Map
to Data Source.
     2. Select the Function Module for Create Option as below and press
Continue

3. Then the below window will be open with the Data Source Parameter and
the Data Mapping has to be done as follows. Also we have an option “Propose
Mapping”, which does the data mapping automatically.
Create
Drag and drop the Data Source Parameter as shown below for the Mapping
Operation.
Similarly, we have defined the mapping for Delete, GetEntity, GetEntitySet and
Update operation using the Function Modules we have already created.
Delete
GetEntity
We have added one more Property, Empid to fetchthe records from the
backend based on the Key.
GetEntitySet

We have added one more Property, Empid to fetch the records from the
backend based on the Key.
Update
Once the mapping is completed, generate run time objects ( Ctrl+F3 ) and
go to your Data Provider Class(DPC) to find the ABAP coding has been
generated automatically.
Once the above all activities are completed, we have to register the OData
service to consume them.
2.1.5 Registration of Service
1. Go to gateway and select the Gateway service. You will find the OData
service is yet to be registered as the Registration status traffic light button is
grey.

     2. Select the Service and press the Register   button to complete
the Registration of the OData service and press yes to continue.
     3. Select the package assignment as local object and continue the process.
     4. On press of continue will register the OData Service. You can also add
the service using the Transaction code: /IWFND/MAINT_SERVICE.

5. Select the Gateway Client and this will launch you in the SAP Netweaver
Gateway Client. This can also be accessed separately using the Tcode :
/IWFND/GW_CLIENT. Execute the uri:
/sap/opu/odata/sap/ZMM_EMP_SRV/$metadata to test the OData service.
By this successful response, the OData service has been built and it is working
fine. Further we will see, how can we consume the OData service using SAP
UI5 application in the next chapter.
Metadata Uri: http://<host name>:<port
no>/sap/opu/odata/sap/ZMM_EMP_SRV/$metadata : OData Service Metadata
document can be accessed here.
Entity Set : http://<host name>:<port
no>/sap/opu/odata/sap/ZMM_EMP_SRV/EmployeeSet : The Employee records
can be accessed here.
Replace the tags <host name>, <port no> with your server and port details.
3. Consumption of OData Service using SAP UI5 application

In this example, we will create a SAPUI5 application for Employee and we will
see the see how the OData service can be consumed for the basic CRUD
operation. Whereas the below are the CRUD methods and their equivalent
HTTP methods in the OData service.
3.1 Consuming OData Service for CRUD Operation using SAP UI5 Application
In this example, we are going to create a UI5 application by which we can
consume the already created OData service for the basic CRUD operation.
This app contains the following details:
Prerequisite
Creation of SAP UI5 Application
Create a Dashboard to display Employee Details
Popup window for Data modify operation
Create button for Data creation
3.1.1  Prerequisites
We need an Eclipse IDE with version Kepler, Luna or any other latest version
with the SAP UI5 plugin to develop the SAP UI5 application. If you want to
know how the SAP UI5 development plugins can be added to eclipse, click
here.
3.1.2  Creation of SAP UI5 Application
Create a New SAP UI5 project by the below path in the menu bar
     1. Go to Menu bar : File>New>Other>SAP UI5 Application
development(Application Project) and then press next.

2. Give the project name, with the option to create a Initial view. The
view can be created separately as well.

     3. Provide the view name and choose the Paradigm as JavaScript and
press Finish.
     4. By this, we have created an empty SAPUI5 project called
“EmpCRUD” with view “EmpDetails” as below.
3.1.3  Create a Dashboard for Employee details display

1. Create a dashboard with the Table contains fields as Employee Id, Name,
Address and Designation. Assign the same to the Page and return the page.
(EmpDetails.view.js)
2. You can execute and view the dashboard the option “Web App Preview”
as below. Also you can use the option “Run on Server”, but you need to install
Tomcat / any other web server for the same.

     3. Then it appears in the Eclipse as below. Further you can copy and paste
the url in the chrome browser. You can use any browser, but I have used
chrome as the debugging in bit easy.
     4. In the browser, it appears as below. An empty Dashboard is built now.
     5. Now the Dashboard is built, we will see how the data can be populated
here. Go to “EmpDetails.controller.js” and in the onInit function, write the
coding as below to fetch the data from server. This will do a OData call to fetch
the data from the server in JSON format. This data further has to be bind to the
table we built already. Replace the tags <Server Name>, <Port No> with your
respective server details.
ZMM_EMP_SRV:  Name of the OData Service, we already built.
EmployeeSet: Name of the entity set name for employees.

     6. The data binding happens as below.
Run the app again in the “Web App Preview” to see the data displayed in the
dashboard as below. When prompted for login credentials to your backend
server, provide your User id/Password credentials to continue.
     7. When you run/execute the application, it may not run due to ‘Access
ControlAllowOrigin’ issue. To overcome this issue, we have an option
available with chrome browser.
     Make sure you close out all instances of Google Chrome including
ending all its processes in the Windows Task Manager.
     RightClick on your Google Chrome Icon, Go to the Target:  and add
the command “–disablewebsecurity”, apply the settings as below.
     This should allow you to overcome the ‘AccessControlAllowOrigin’
issue and the application should run in the chrome browser.

     8.When executed again, the employee data appears in the chrome
browser as below.
By this READ (GET) operation is complete. Further we will see the
remaining operations below.
3.1.4  Popup window for Data Modify
     1. We will create a popup window with text areas for Employee Id, Emp
Name, Address and Designation with three buttons Update, Delete and Cancel
for the modify operations. Go to View.js and add the coding as below.

2. We have the dialog box or the popup window created now. Further we
will see how we can make use of the dialog box for the modify operation.
On the press of employee details, we will open a dialog box where we will
show the employee details and it can be modified or deleted. We will read the
employee details from the selected item and will populate the dialog box. The
key, “Employee id” we will disable for edit.
3. Once it is done, re run the application to see a dialog window popup on
a selection of the item. The selected record details are shown now. But the

buttons “Update”, ”Delete” and “Cancel” actions are  yet to be defined.
     4. Go to the controller.js. where you can define the action of the
Update button.
     5. GET in the OData call is used to fetch the XCSRF token. Once the
token is fetched, it act as an authentication to do the further update(PUT)
operation.
Note: You need a CSRF token to be fetched to perform the Modify/Insert
operation. To know more about the CSRF token click here.
Rerun the application to test the update operation. I have updated the
address and pressed update button.

     6. On the success, we will reload the main page with the newly updated
details.
     7. On the press of Ok button, the page will be reloaded with the newly
updated details.
The update operation is complete. We will further see the Delete operation
details.
     8. Go to the controller.js. where we can define the action of the Delete
button.

token is fetched, it act as an authentication to do the further
delete(DELETE) operation.
Rerun the application to test the delete operation. I have selected a
record and pressed delete button.
     10. On the success, we will reload the main page with the deleted details.
     11. On the press of Ok button, the page will be reloaded with the modified
details.

     12. The Delete operation is complete. On the press of the cancel button we
will close the dialog box by adding the below in the controller.js
3.1.5 Create button for Data Creation
     1. We will place a button “Create New Employee” in the dashboard and by
this we will see the creation of a new employee.
Go to view.js where we will create button Submit, Save. We will add the Save
button to the Dialog box.
     2. We will add the button Submit button to the main dashboard as below.

     3. Further we will go to controller.js to do the action for the “Create
New Employee”. We will use the same dialog box, we have already created
for the modify operation. We will hide the “Save” button in the modify
operation and while creation, we will hide the “Update”, “Delete” button.
     4. Rerun the application to see the new button “Create New
Employee” visible in the main page and on the press of the button, a
dialog box with the employee details can be added.
     5. While press on the save, nothing will happen as we are yet to write
the function for the “Save” action.
Go to the controller.js, where we can define the action for the “Save”
button.

token is fetched, it act as an authentication to do the further Create(POST)
operation.
Rerun the application to test the Create operation.
7. On the success, we will reload the main page with the newly created
details.

     8. On the press of Ok button, the page has been reloaded with the newly
created details.
The Create operation is complete. By then we have completed all the basic
CRUD operations.
4. Source code used
The source code used in this project is also given as a reference here.
Index.html
<!DOCTYPE HTML>
<html>
            <head>
                        <meta http‐equiv=“X‐UA‐Compatible” content=“IE=edge”>
                        <meta http‐equiv=‘Content‐Type’ content=‘text/html;charset=UTF‐8’/>
                        <script src=“resources/sap‐ui‐core.js”
                                                id=“sap‐ui‐bootstrap”
                                                data‐sap‐ui‐libs=“sap.m”
                                                data‐sap‐ui‐theme=“sap_bluecrystal”>
                        </script>
                        <!– only load the mobile lib “sap.m” and the “sap_bluecrystal” theme –>
                        <script>
                                                sap.ui.localResources(“empcrud”);
                                                var app = new sap.m.App({initialPage:“idEmpDetails1”});

                                    }),
                                    new sap.m.Label({text:“Enter Designation”}),
                                    new sap.m.Input({
                                    maxLength: 20,
                                    id: “Role”
                                    }),oBtnUpd, oBtnDel, oBtnCan, oBtnSav
                                    ]
                                    });

// Table or Dashboard to show the Employee Data
                        var oTable = new sap.m.Table({
                                    id: “Employees”,
                                    itemPress : [ oController.ItemPress,oController ],
                                    columns: [
                                    new sap.m.Column({
                                    width: “1em”,
                                    header: new sap.m.Label({
                                    text: “Emp ID”  }) }),
                                    new sap.m.Column({
                                    width: “1em”,
                                    text: “Name” })
                                    }),
                                    new sap.m.Column({
                                    width: “1em”,
                                    text: “Address”
                                    })
                                    }),
                                    new sap.m.Column({
                                    width: “1em”,
                                    text: “Designation”
                                    })
                                    })
                                    ]
                        });

// Template  to map the data to the respective column

*/
            onInit: function() {

                        var sServiceUrl = “http://<host name>:<port no>/sap/opu/odata/sap/ZMM_EMP_SRV”;
                        var oModel = new sap.ui.model.odata.ODataModel(sServiceUrl,true);

                        var oJsonModel = new sap.ui.model.json.JSONModel();

        oModel.read(“/EmployeeSet?”,null,null,true,function(oData,repsonse){
            oJsonModel.setData(oData);
     });
     sap.ui.getCore().setModel(oJsonModel);
            },
/**
* Similar to onAfterRendering, but this hook is invoked before the controller’s View is re–rendered
* (NOT before the first rendering! onInit() is used for that one!).
*/
//          onBeforeRendering: function() {
//
//          },
/**
* Called when the View has been rendered (so its HTML is part of the document). Post–rendering
manipulations of the HTML could be done here.
* This hook is the same one that SAPUI5 controls get after being rendered.
*/
//          onAfterRendering: function() {
//
//          },
/**
* Called when the Controller is destroyed. Use this one to free resources and finalize activities.
*/
//          onExit: function() {
//

//          }
            ItemPress: function(evt) {
                        sap.ui.getCore().byId(“Dialog”).open();
                        sap.ui.getCore().byId(“Update”).setVisible(true);
                        sap.ui.getCore().byId(“Delete”).setVisible(true);

                        var oSelectedItem = evt.getParameter(“listItem”);
                        var sID = oSelectedItem.getBindingContext().getProperty(“Empid”);
                        var sName = oSelectedItem.getBindingContext().getProperty(“Empname”);
                        var sAddr = oSelectedItem.getBindingContext().getProperty(“Empadd”);
                        var sRole = oSelectedItem.getBindingContext().getProperty(“Empdes”);

                        sap.ui.getCore().byId(“Id”).setValue(sID);
                        sap.ui.getCore().byId(“Name”).setValue(sName);
                        sap.ui.getCore().byId(“Address”).setValue(sAddr);
                        sap.ui.getCore().byId(“Role”).setValue(sRole);
                        sap.ui.getCore().byId(“Id”).setEnabled(false);
                        },

                        NewEntry: function() {
                        sap.ui.getCore().byId(“Dialog”).open();
                        sap.ui.getCore().byId(“Save”).setVisible(true);
                        sap.ui.getCore().byId(“Update”).setVisible(false);
                        sap.ui.getCore().byId(“Delete”).setVisible(false);
                        sap.ui.getCore().byId(“Id”).setValue(“”);
                        sap.ui.getCore().byId(“Name”).setValue(“”);
                        sap.ui.getCore().byId(“Address”).setValue(“”);
                        sap.ui.getCore().byId(“Role”).setValue(“”);
                        sap.ui.getCore().byId(“Id”).setEnabled(true);
                        },

Save: function() {

            var oEntry = {};
            oEntry.Empid= sap.ui.getCore().byId(“Id”).getValue();
            oEntry.Empname= sap.ui.getCore().byId(“Name”).getValue();
            oEntry.Empadd= sap.ui.getCore().byId(“Address”).getValue();
            oEntry.Empdes= sap.ui.getCore().byId(“Role”).getValue();

            OData.request({
                        requestUri : “http://<host name>:<port
no>/sap/opu/odata/sap/ZMM_EMP_SRV/EmployeeSet”,
                        method : “GET”,
                        headers : {
                                                “X‐Requested‐With” : “XMLHttpRequest”,
                                                “Content‐Type” : “application/atom+xml”,
                                                “DataServiceVersion” : “2.0”,
                                                “X‐CSRF‐Token” : “Fetch”
                                                }
                                    },
                                    function(data, response) {
                                                header_xcsrf_token = response.headers[‘x‐csrf‐token’];
                                                var oHeaders = {
                                                            “x‐csrf‐token” : header_xcsrf_token,
                                                            ‘Accept’ : ‘application/json’,
                                    };
                        OData.request({
                                                method : “POST”,
                                                headers : oHeaders,
                                                data:oEntry
                                    },
                                                function(data,request) {
                                                alert(“Employee Created Successfully”);
                                                location.reload(true);
                                    },          function(err) {
                                                alert(“Employee Creation Failed”);
                                    });
                        }, function(err) {
                                                var request = err.request;
                                                var response = err.response;
                                                alert(“Error in Get — Request “ + request + ” Response “
+ response);
                                    });
                                                            },
Update: function() {

                                                            alert(“Error in Get — Request “ + request +
” Response “ + response);
                                                });
                                                },
// Delete Action
Delete: function() {
            var oEntry = {};
            OData.request({
no>/sap/opu/odata/sap/ZMM_EMP_SRV/EmployeeSet(‘” + oEntry.Empid + “‘)”,
                        method : “GET”,
                        headers : {
                                                }
                                    },
                                                header_xcsrf_token = response.headers[‘x‐csrf‐token’];
                                                var oHeaders = {
                                    };
                        OData.request({
no>/sap/opu/odata/sap/ZMM_EMP_SRV/EmployeeSet(‘”+oEntry.Empid+“‘)”,
                                                method : “DELETE”,
                                                headers : oHeaders,
                                                data:oEntry
                                    },
                                                alert(“Delete Success”);

Alert Moderator
                                    },          function(err) {
                                                alert(“Delete Failed”);
                                    });
                        }, function(err) {
                                                alert(“Error in Get — Request “ + request + ” Response “
+ response);
                                    });

                              },
// Cancel Action
  Cancel:function() {
                            sap.ui.getCore().byId(“Dialog”).close();
                                       }
})
53 Comments
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Excellent post !
Radhakrishnan Guhan
February 11, 2015 at 6:24 pm
Guillaume GARCIA
February 12, 2015 at 3:45 pm

Simple exercise on o data and sap ui5 application for the basic crud operation sap blogs

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