Bookshelf.js vs GORM: What are the differences?

### Introduction
In this comparison, we will outline the key differences between Bookshelf.js and GORM, focusing on their unique features and capabilities.

1. **Language Compatibility**: Bookshelf.js is specifically designed for Node.js applications, while GORM is tailored for Groovy-based applications that use the Grails framework. This difference in language compatibility impacts the integration and compatibility of these ORMs with the overall technology stack of the application.

2. **ORM Design Philosophy**: Bookshelf.js follows the Data Mapper pattern, emphasizing separation of concerns by isolating the business logic from the database logic. On the other hand, GORM adopts the Active Record pattern, where the model classes encapsulate both the data and behavior, providing a more straightforward and integrated approach to database operations.

3. **Database Support**: Bookshelf.js has built-in support for multiple databases such as PostgreSQL, MySQL, and SQLite, offering flexibility in choosing the database that best fits the application requirements. In contrast, GORM is primarily focused on supporting the Groovy-based GORM-oriented databases, potentially limiting the database options available to developers.

4. **Community and Ecosystem**: Bookshelf.js has a vibrant and active community with a rich ecosystem of plugins, extensions, and documentation readily available to developers. GORM, being part of the Grails framework, benefits from the larger Grails community but may have a narrower focus on database-related features compared to the broader ecosystem of Bookshelf.js.

5. **Performance and Scalability**: Bookshelf.js is known for its lightweight and performant nature, making it suitable for small to mid-sized applications that require fast data access and manipulation. In contrast, GORM, being part of the Grails framework, provides a more integrated solution for larger-scale applications with enterprise-level requirements, offering features for scalability and robustness.

6. **Learning Curve and Ease of Use**: Bookshelf.js is praised for its simplicity and ease of use, with a straightforward API that is easy for beginners to pick up and start using. GORM, while powerful and feature-rich, may have a steeper learning curve due to its integration with the Grails framework and the additional concepts it introduces.

In Summary, the key differences between Bookshelf.js and GORM lie in their language compatibility, ORM design philosophy, database support, community and ecosystem, performance and scalability, and learning curve and ease of use.