ended the last post with a discussion of the fundamental problem with Django's Object-Relational Mapper, namely, that it is developed for and by Django
Very interesting approach!
"Apache Empire-db is an Open Source relational data persistence component which allows database vendor independent dynamic query definition as well as safe and simple data retrieval and updating. Compared to most other solutions like e.g. Hibernate, TopLink, iBATIS or JPA implementations, Empire-db takes a considerably different approach, with a special focus on compile-time safety, reduced redundancies and improved developer productivity."
After graduating from the five-minute wiki to real-life applications, Django programmers can easily create confusing, hard-to-maintain, or inefficient model classes. Learn how to avoid common querying mistakes, use model managers to encapsulate complex queries, and take advantage of the powerful new aggregation features available in Django V1.1.
Squeryl
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A Scala ORM and DSL for talking with Databases with minimum verbosity and maximum type safety
Write compiler validated statements.
Squeryl statements that pass compilation won’t fail at runtime. Refactor your schema as often as is required, the Scala compiler and your IDE will tell you exactly which lines of code are affected.
Never repeat yourself
The Composability of Squeryl statements allows you to define them
once and reuse them as sub queries within other statements.
Write declaratively
Write as declaratively as SQL, only with less boilerplate. SQL’s declarativeness is preserved, not encapsulated in a lower level API that requires imperative and procedural code to get things done.
Explicitly control retrieval granularity and laziness
A significant part of optimizing a database abstraction layer is to choose for every situation the right balance between fine and large grained retrieval, and the optimal mix of laziness and eagerness. Data retrieval strategies are explicit in Squeryl rather than driven by configuration like current generation Java ORMs read more
The Doctrine Project is the home to several PHP libraries primarily focused on database storage and object mapping. The core projects are a Object Relational Mapper (ORM) and the Database Abstraction Layer (DBAL) it is built upon.
J. Demey, M. Jarrar, и R. Meersman. Proceedings of the International Workshop on Rule Markup Languages for Business Rules on the Semantic Web, (RuleML 2002), том 60 из CEUR Workshop Proceedings, стр. 107-128. (июня 2002)