Leveraging Software Design Patterns with extendObject() in ServiceNow Script Include for Developers

[BillMartin]

Introduction to script include extendObject() and Design Patterns in ServiceNow

In the world of software development, design patterns are essential for creating scalable and maintainable applications. For ServiceNow developers, the extendObject() method is a powerful tool to implement inheritance and promote Object-Oriented Design Patterns in ServiceNow. This approach helps in building reusable, modular, and testable components, making your server-side logic more efficient.

In this article, we’ll discuss how script include extendObject() enhances your code structure and allows you to implement design patterns, particularly when dealing with Script Includes and GlideRecord operations.

What is ServiceNow Script Include extendObject()?

The Object.extendsObject() method in ServiceNow enables you to create a child class that inherits from a parent class. This facilitates code reusability by allowing you to share common logic across multiple subclasses.

This approach aligns with software design patterns like the Repository Pattern, which separates data access from business logic.

Four Benefits of Using extendObject() with Design Patterns in ServiceNow

Here are some key advantages:

1. Separation of Concerns: You can clearly distinguish between data access and business rules, improving readability and organization.
2. Code Reusability: Shared methods (e.g., database queries) are defined once in a base class and reused across various subclasses.
3. Maintainability: Changes to shared functionality only need to be made in the base class.
4. Scalability: Complex applications can be managed through structured, modular code, enabling better handling of future requirements.

Implementing the Repository Pattern in ServiceNow

In a ServiceNow context, the Repository Pattern can help standardize how records are queried and updated. By creating a base repository with common methods (e.g., fetching by sys_id), you can extend it with specialized repositories for different tables, like incident.

This structured approach ensures that your code is more maintainable, testable, and scalable.

Video Walkthrough

Want to see a live implementation of extendObject() and design patterns in action? Check out our video where we guide you through:

🔹Understanding extendObject() in ServiceNow
🔹Creating and extending Script Includes
🔹Applying the Repository Pattern for data management
🔹Real-world examples with GlideRecord
🔹Best practices for scalable server-side scripting

 

 

Conclusion

Leveraging script include extendObject() with software design patterns is a best practice for ServiceNow developers. It allows you to create reusable components, reduce code duplication, and maintain a clean codebase. By incorporating these concepts into your Script Includes, you’ll be better equipped to handle complex business logic and improve your application's performance.

If you have any thoughts, questions, or additional tips on using extendObject(), share them in the comments section below! 😊

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