Leave management is one of the most common business processes across organizations, yet many companies continue to rely on fragmented systems, spreadsheets, and manual approval workflows. Modern enterprises require intelligent, scalable, and user-friendly applications that simplify leave request management while ensuring compliance with organizational policies.

In this first part of our SAP RAP End-to-End Leave Management Application series, we focus on building the foundational architecture of a custom leave request solution using the SAP ABAP RESTful Application Programming Model (RAP).

The journey begins with designing the underlying database model that supports leave management processes. Multiple business entities are introduced, including Leave Types, Duration Types, Leave Requests, and supporting text tables that provide multilingual descriptions and user-friendly value selections.

Once the persistence layer is established, we move to the semantic layer by creating CDS Views that expose business data in a structured and reusable format. Through carefully designed interface and projection views, we create a clean architecture that separates database structures from application consumption models.

To improve usability and user experience, value help CDS Views are implemented for Leave Types and Duration Types. These reusable search helps allow users to select valid values efficiently while maintaining data consistency throughout the application.

A major focus of this chapter is the introduction of RAP Business Objects through Behavior Definitions and Behavior Implementations. These artifacts form the heart of the application by defining how leave requests are created, validated, modified, and processed.

The article also explores local type definitions and RAP implementation classes that prepare the application for advanced business rules and approval workflows in upcoming parts of the series.

By the end of this tutorial, readers will have built the complete foundation for a modern SAP Fiori-based Leave Management Application, ready for transactional processing and future workflow enhancements.

Topics Covered

1. Leave Management Business Scenario

• Employee Leave Requests
• HR Process Automation
• Leave Approval Challenges
• Business Requirements

2. Database Table Design

Leave Type

• Leave Categories
• Annual Leave
• Sick Leave
• Maternity Leave
• Special Leave

Leave Type Text

• Language-Dependent Descriptions
• User-Friendly Display Values
• Multilingual Support

Duration Type

• Full Day Leave
• Half Day Leave
• Hourly Leave
• Flexible Duration Models

Duration Type Text

• Business Descriptions
• Language Support
• Reusable Reference Data

Leave Requests

• Employee Leave Records
• Request Tracking
• Leave Status Management
• Business Transaction Data

3. CDS View Development

• RAP Data Modeling
• CDS Best Practices
• Semantic Layer Design
• Reusable Data Structures

4. Value Help Development

Duration Type Value Help

• Search Assistance
• User Input Validation
• Business-Friendly Selections

Leave Type Value Help

• Dynamic Value Selection
• Improved User Experience
• Data Quality Controls

5. Interface CDS Views

Leave Type Interface View

• Core Business Data Exposure
• RAP Data Access Layer

Leave Type Text Interface View

• Text Associations
• Language Handling

6. Leave Request CDS View

• Main Business Object
• Leave Transaction Data
• Business Relationships
• Data Consumption Design

7. Projection View

• SAP Fiori Consumption Layer
• User Interface Preparation
• Business Service Exposure

8. RAP Behavior Definition

Leave Request Behavior

• Create Operations
• Update Operations
• Delete Operations
• Business Rules

9. RAP Behavior Implementation

• Custom Logic Processing
• Leave Validation Rules
• Business Event Handling
• Transaction Management

10. Local Types

• RAP Local Structures
• Data Processing Objects
• Internal Business Logic Support

Key Benefits

✔ Complete end-to-end RAP application architecture

✔ Modern HR leave management solution

✔ Reusable CDS View design

✔ Enterprise-grade value help implementation

✔ SAP Fiori-ready business objects

✔ Scalable RAP development patterns

✔ Clean separation of persistence and consumption layers

✔ Foundation for approval workflows and automation

https://drive.google.com/file/d/17wGI6t9A9wysqFvOZaCn072T0m5F0fRU/view?usp=sharing