Propel ORM vs TypeORM: What are the differences?

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1. Database Support: Propel ORM primarily supports MySQL, SQLite, PostgreSQL, and MSSQL databases, while TypeORM supports a broader range of databases such as MySQL, MariaDB, PostgreSQL, SQLite, Microsoft SQL Server, Oracle, and MongoDB.
2. Programming Language Compatibility: Propel ORM is known for its PHP compatibility, while TypeORM is specifically designed for TypeScript and JavaScript environments.
3. Entity Relationships: Propel ORM provides support for relationships like one-to-many, many-to-many, and inheritance mappings, whereas TypeORM offers advanced support for entity relationships with features like eager and lazy loading, cascades, and more.
4. Query Language: Propel ORM uses Criteria queries for generating SQL queries, while TypeORM utilizes a repository pattern with custom query builders or a QueryBuilder to generate SQL statements.
5. Community and Support: Propel ORM has been around for a longer period with an established community and documentation, whereas TypeORM is gaining popularity and has an active community but may not have as extensive documentation and resources as Propel ORM.
6. Active Record vs. Data Mapper Pattern: Propel ORM follows the Data Mapper pattern, separating database logic from domain logic, while TypeORM adopts the Active Record pattern, where database logic is intertwined with domain logic in the entity classes.

In Summary, Propel ORM and TypeORM differ in database support, programming language compatibility, entity relationship handling, query language, community support, and architectural patterns.