Exercise: Adding Custom Business Logic

Add custom code.

1. In the project, go to folder srv, representing the service, and select New File in the context menu.

2. Enter risk-service.js as a name.

3. Select the new file in the explorer, an editor opens.

4. Enter the following lines into the editor:

   Note

   The defined constant for the BusinessPartners will be used in a later step.

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   // Import the cds facade object (https://cap.cloud.sap/docs/node.js/cds-facade)
   const cds = require('@sap/cds')
   
   // The service implementation with all service handlers
   module.exports = cds.service.impl(async function() {
   
       // Define constants for the Risk and BusinessPartner entities from the risk-service.cds file
       const { Risks, BusinessPartners } = this.entities;
   
       // This handler will be executed directly AFTER a READ operation on RISKS
       // With this we can loop through the received data set and manipulate the single risk entries
       this.after("READ", Risks, (data) => {
           // Convert to array, if it's only a single risk, so that the code won't break here
           const risks = Array.isArray(data) ? data : [data];
   
           // Looping through the array of risks to set the virtual field 'criticality' that you defined in the schema
           risks.forEach((risk) => {
               if( risk.impact >= 100000) {
                   risk.criticality = 1;
               } else {
                   risk.criticality = 2;
               }
   
               // set criticality for priority
               switch (risk.prio_code) {
                   case 'H':
                       risk.PrioCriticality = 1;
                       break;
                   case 'M':
                       risk.PrioCriticality = 2;
                       break;
                   case 'L':
                       risk.PrioCriticality = 3;
                       break;
                   default:
                       break;
               }
   
           })
       })
     });

5. Save the file.

Update the List Report Page.

1. Open the Page Map of the SAP Fiori Elements application (right click on the "app/risk-management" folder → "Show Page Map").

2. Navigate to the List Report Page to edit it.

3. Under columns, choose Priority and update the annotations as follows:

   

4. Next, update the annotations of the Impact column.

   

Update the annotations for Impact and Priority on the Object Page.

1. Set the Criticality annotation for the Priority field to PrioCriticality.

   

2. Set the Criticality annotation for the Impact field to criticality.

   

Preview the SAP Fiori Elements application.

1. In the browser, reload the preview of the SAP Fiori Elements application.

   It now shows our work list with the Priority and Impact columns with color and an icon, depending on the amount in impact.

   

   Note

   Keep your application (cds watch) running in your web browser, you will need it later.