Modify a Customer Record in an MDK App

Regardless of whether your application is online or offline, you can allow users to modify data in the application.

For online applications, the changes are saved to the backend immediately.

For offline applications, the changes are stored locally until they are synced using an Upload action.

First, you will create a CloseModalPage_Cancel.action that closes the current page and cancels or interrupts any execution in process. This will be used with the cancel button on the Edit Customer page.

You can close pages with the option to terminate ongoing events or wait until they are complete.

You can find more details about Close Page Action.

Right-click on the Actions folder | New MDK Action | choose MDK UI Actions in Category | click Close Page Action | Next.

Provide the below information:

Click Next and then Finish on the confirmation step.

In this step, you will create the Edit Customer Detail page as a Form Cell Page. This type of page allows for form input style changes. The page will provide only a subset of items available on the Customer Detail page. You will add the fields that will be editable by the end-user.

Right-click on the Pages folder | New MDK Page | Form Cell Page | Next.

A Form Cell Page is suitable for pages that generate new objects or modify existing objects. It includes a form cell container by default. You can add form sections, multiple containers or action controls to this page. Under each container section, you can add various container items.

You can find more details about Form Cell page.

Enter the Page Name Customers_Edit and click Next and the Finish on the Confirmation step.

In the Properties pane set the Caption to Update Customer.

Now, you will add the fields (like first name, last name, phone & email address) that will be editable by the end-user.

In the Layout Editor, expand the Control | Container Item section.

You can find more details about available controls in Form Cell page.

Drag and drop a Simple Property onto the Page area.

Drag and drop three additional Simple Property controls onto the page so you have four total controls.

Select the first Simple Property control and provide the below information:

Make sure, Format should be set as Binding.

Select the second Simple Property control and provide the below information:

Select the third Simple Property control and provide the below information:

Select the last Simple Property control and provide the below information:

Save the changes to the Customers_Edit.page.

Now, you will add a button on the Edit Customer page and set it’s onPress to CloseModalPage_Cancel.action created in step 1.

Drag and drop an Action Bar Item control to the upper left corner of the action bar.

Action Bar Item is a button that users can use to fire actions when pressed. You can add an Action Bar Item only to the Action Bar (at the top of the page).

In the Properties pane, click the link icon to open the object browser for the System Item property.

Double click on the Cancel type and click OK.

System Item are predefined system-supplied icon or text. Overwrites Text and Icon if specified.

Now, you will set onPress to CloseModalPage_Cancel.action.

In Events tab, click the link icon for the OnPress property to open the object browser.

Double click on the CloseModalPage_Cancel.action and click OK to set it as the OnPress Action.

Save the changes to the Customers_Edit.page.

Now, create a navigation action that will open the Customers_Edit.page when executed.

Right-click on the Actions folder | New MDK Action | choose MDK UI Actions in Category | click Navigation Action | Next.

Provide the below information:

Click Next and then Finish on the confirmation step.

You will add a button to the Customers_Detail.page called Edit. You will link this button to the navigation action you just created. This event will open the Customers_Edit.page when the Edit button is pressed by the end-user.

In Customers_Detail.page, drag and drop an Action Bar Item to the upper right of the action bar.

Click the link icon to open the object browser for the System Item property.

Double click on the Edit type and click OK.

In the Properties pane, click the Events tab, click the link icon for the OnPress property to open the object browser.

Double Click on the NavToCustomers_Edit.action and click OK to set it as the OnPress Action.

Save the changes to the Customers_Detail.page.

The next step is to store newly updated record locally for an offline application or send the updated record directly back to the backed for online applications. You will now create an action to map the changes received from the Customers_Edit.page to the corresponding field in the OData service. You will also show a failure message if the update action fails to save the changes.

First, define a failure message.

Right-click on the Actions folder | New MDK Action | choose MDK Message Actions in Category | click Message Action | Next.

Provide the below information:

Click Next and then Finish on the confirmation step.

Next, you will define Close Page-Complete Action which allows the end-user to close the page and allow any execution to continue.

You can close pages with the option to terminate ongoing events or wait until they are complete.

Create a Close Page–Complete action.

Right-click on the Actions folder | New MDK Action | choose MDK UI Actions in Category | click Close Page Action | Next.

Provide the below information:

Click Next and then Finish on the confirmation step.

Next, you will create the OData Update action to update entity action that will map the changes to the correct entities in the OData service and save the changes.

You can find more details about Update Entity Action.

Right-click on the Actions folder | New MDK Action | choose MDK Data Actions in Category | click OData Action | Next.

Provide the below information:

The readLink is a direct reference to an individual entity set entry.

Click Next.

In Property and Update Links step, uncheck City.

Since in Customers_Detail.page, we defined four properties (First Name, Last Name, Phone & Email) to be edited, now in this step, we will bind them to respective UI Controls.

Check the EmailAddress property and click the link icon to open the object browser.

Change the drop down in the object browser to Controls & ClientData, click the Current Page radio button.

In the search box start typing the control name FCEmail. The list will filter down to show the matching values. Double click on the Value (Value) entry under the FCEmail field and click OK to set binding.

Repeat the above step for remaining properties: FirstName, LastName and PhoneNumber.

Click Next and Finish on the confirmation screen. The action editor will open with the Customers_UpdateEntity.action loaded.

Next, define Success and Failure actions for Customers_UpdateEntity.action.

In the action editor for the new action, expand the Common Action Properties and provide the below information:

When Customers_UpdateEntity.action gets executed successfully then CloseModalPage_Complete.action will be triggered or if Customers_UpdateEntity.action fails then UpdateCustomerEntityFailureMessage.action will be triggered.

Save the changes to the Customers_UpdateEntity.action.

Next, you will set the OnPress of the Save button.

Now that the Update action is created, you will need to call the Update action when the end-user presses the Save button. You will add a Save button on the Customers_Edit.page and link it to the Customers_UpdateEntity.action.

In Customers_Edit.page, drag and drop an Action Bar Item to the upper right corner of the action bar.

Click the link icon to open the object browser for the System Item property.

Double click on the Save type and click OK.

In the Properties pane | Events tab, click the link icon for the OnPress property to open the object browser, bind it to Customers_UpdateEntity.action.

Save the changes to the Customers_Edit.page.

Deploy the updated application to your MDK client.

Right-click on the DemoSampleApp MDK Application in the project explorer pane and select MDK Deploy and Activate.

Since we have deployed already both the destination and app id should be pre-selected based on the last time you deployed our application.  Confirm the Destination Name is mobileservices_cf and the Application Id is com.sap.mdk.demo and click Next.

Make sure you are choosing the right device platform tab above.

Re-launch the app on your device, you may asked to authenticate with passcode or Fingerprint. You will see a Confirmation pop-up, tap OK.

Tap CUSTOMER LIST, tap one of the available customer record, you will then navigate to Customer detail page. Tap edit icon.

For example, updating First Name from Sebastien to Rob. Tap save icon.

Local record gets updated accordingly.

You can cross verify if a record has been updated in the backend.

Backend URL can be found in Mobile Services Cockpit.

Mobile Applications | Native/Hybrid | Click on the MDK App com.sap.mdk.demo | Mobile Sample OData ESPM | click Root URL v2 | add /Customers/ at the end of the URL

But here result is pointing to old First Name (Sebastien).

Since this is an Offline application, new entry is added to the request queue of the local store which needs to be sent or uploaded to the backend explicitly.

MDK base template has added a Sync button on main page of the app to upload local changes from device to the backend and to download the latest changes from backend to the device. Actions | Service | UploadOffline.action & DownloadOffline.action.

On Main page, tap SYNC, a successful message will be shown.

Re-launch the app on your device, you may asked to authenticate with passcode or Touch ID. You will see a Confirmation pop-up, tap OK.

Tap Customer List, tap one of the available customer record, you will then navigate to Customer detail page. Tap Edit..

For example, updating First Name from Sebastien to Rob. Tap Save.

Local record gets updated accordingly.

You can cross verify if a record has been updated in the backend.

Backend URL can be found in Mobile Services Cockpit.

Mobile Applications | Native/Hybrid | Click on the MDK App com.sap.mdk.demo | Mobile Sample OData ESPM | click Root URL v2 | add /Customers/ at the end of the URL

But here result is pointing to old First Name (Sebastien).

Since this is an Offline application, new entry is added to the request queue of the local store which needs to be sent or uploaded to the backend explicitly.

MDK base template has added a Sync button on main page of the app to upload local changes from device to the backend and to download the latest changes from backend to the device. Actions | Service | UploadOffline.action & DownloadOffline.action.

On Main page, tap Sync, a successful message will be shown.

Now, refresh the URL to check if record has been updated in the backend.

As Sync is pressed, UploadOffline.action gets trigger to upload local changes from device to the backend and on success of this call, DownloadOffline.action is being called.