Sling Models

[Keerthi0555]

If we can get fields of dialog from properties in htl. then we can go with it or we should use SlingModels.

[EstebanBustamante · Accepted solution]

As a best practice, you should always prefer the usage of SlingModels instead of accessing data directly in your HTL (although technically possible). 

Here is an excellent article explaining the main reasons why this best practice is recommended: https://www.bounteous.com/insights/2020/07/22/aem-sling-models-why-bother 

 Let me give you some thought of why you should always decide to go with a Sling model:

1. Abstraction and Simplification: Sling Models provide a higher level of abstraction compared to traditional JCR (Java Content Repository) node manipulation. This abstraction allows developers to focus more on the logic and behavior of the components rather than dealing with low-level JCR API details.

2. POJO-Based Approach: Sling Models use Plain Old Java Objects (POJOs) to define the structure and behavior of components. This makes the development process more intuitive and familiar for Java developers.

3. Annotation-Based Configuration: Sling Models use annotations to define the mapping between Java fields and the corresponding properties of a component. This approach reduces boilerplate code and configuration, making the codebase cleaner and more maintainable.

4. Automatic Resource Injection: Sling Models automatically inject AEM resources (nodes) into the corresponding Java objects. This simplifies the retrieval of component properties, reducing the need for manual JCR queries and property mappings.

5. Type Safety: Sling Models offer type-safe methods for accessing component properties. This reduces the risk of runtime errors that can occur with less type-safe approaches.

6. Unit Testing: Because Sling Models are based on POJOs, they can be easily unit tested using standard Java testing frameworks. This enhances the quality of the codebase by enabling more comprehensive testing.

7. Separation of Concerns: Sling Models promote the separation of concerns by separating the content structure (handled by AEM) from the logic and rendering (handled by the Sling Models). This makes it easier to manage and update components without affecting the underlying logic.

8. Flexibility and Reusability: Sling Models allow you to create reusable Java classes that encapsulate component logic. This can lead to more efficient development processes and better maintainability.

9. Integration with AEM Features: Sling Models integrate well with AEM's features, such as Editable Templates and the Edit Dialog. This integration streamlines the authoring experience and helps maintain a consistent content structure.

10. Community Adoption: Sling Models have gained significant adoption within the AEM developer community. This means that you can find a wealth of resources, tutorials, and best practices to aid in your development efforts.

11. Stick with Sling patterns and  Adobe recommended as best practice