InfoQ Homepage ORM Content on InfoQ
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DataMapper Reaches 1.0 Milestone
DataMapper, an Object Relational Mapper (ORM) for Ruby, arrived at a milestone recently reaching 1.0 status. The release, announced during RailsConf 2010, and coinciding with Dirkjan Bussink's presentation at the conference on the subject.
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Debate: Comparing NHibernate and EF 4
Recently, a post by Oren Eini (a.k.a. Ayende Raheim) touched off a debate around the respective merits and capabilities of NHibernate and Entity Framework 4.0, two .NET-based Object/Relational Maping frameworks. InfoQ explored this debate in more detail to understand some of the perspectives which were given.
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ORM Profiling Tools for the .NET Platform
Sadly the terms “ORM” and “performance problems” often travel together. By hiding the underlying SQL from the developers, ORMs can offer a huge productivity boost. Unfortunately they also make it easy to generate ridiculously bad queries without realizing it. And without stored procedures to cross reference, finding the offending code without an ORM-specific profiler can be quite tricky.
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ADO.NET Entity Framework Providers for Oracle
Microsoft’s vision for .NET is a wide one. In addition to support for all programming languages, MS wants to bring together all communication frameworks and data storage engines. While WCF is making headway for standardizing communication APIs, their universal data access model Entity Framework is lagging behind. Much is this is due to lack of direct vendor support from companies like Oracle.
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Fluent NHibernate Has Been Released as 1.0 RC
James Gregory, the owner of the Fluent NHibernate project, has announced his project has reached the 1.0 milestone and it is currently a Release Candidate.
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NHibernate LINQ Provider Released
NHibernate Linq 1.0 has been released. Based on the stable provider from NHibernate Contrib, NHibernate Linq 1.0 is a LINQ provider that supports most operations available through the NHibernate criteria query API.
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Entity Framework CTP for VS 2010
Not everything planned for Visual Studio 2010 made it in beta 1. This includes some important features for ORM fans. Entity Framework CTP 1 includes support for Self Tracking Entities, POCO Templates, and support for EDMX-free coding.
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LINQ to SQL Changes in .NET 4.0
Damien Guard of Microsoft’s Data Programmability has posted a rather long list of the changes to LINQ to SQL. While they are still committed to Entity Framework over the long run, this will do much to alleviate the fear LINQ to SQL will be completely neglected in the mean time.
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Fluent NHibernate Has a Wiki
Fluent NHibernate is an alternative to using XML mappings in NHibernate. Fluent NHibernate is using a fluent interface allowing you to define mappings in code instead of XML. Some people in the community have complained about the lack of documentation for Fluent NHibernate and as a response James Gregory recently announced the official Wiki for Fluent NHibernate.
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Article: Performance Anti-Patterns in Database-Driven Applications
In this article, Alois Reitbauer, a Performance Architect for dynaTrace Software, specifies several architectural anti-patterns which can downgrade an application’s performance. Knowing those anti-patterns and proactively designing the application to avoid them will keep away certain snags that can impact application’s performance.
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Meta-data Synchronization Tools for LINQ to SQL and ADO.NET Entity Framework
The designers in both LINQ to SQL and ADO.NET Entity Framework have a number of limitations. In order to work around these limitations, products such as Huagati DBML/EDMX Tools have been developed. There is no bloat here, everything is a must have for many shops.
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No Change Tracking for ADO.NET Entity Framework 2010
One of the biggest complaints about ADO.NET Entity Framework was that it did not support change tracking. Despite everything from ADO.NET DataSets to every single non-Microsoft ORM having support for this out of the box, Microsoft has no intention of fixing this in the .NET 4.0/VS 2010 timeframe.
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Sequel, The Database Toolkit For Ruby
Sequel, apart from being an alternative to ActiveRecord, offers a complete Ruby toolkit to handle database operations. InfoQ had the chance to catch up with Jeremy Evans who replaced Sharon Rosner as project leader eight months ago.
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Article: Ruby's Roots: Smalltalk Comeback and Randal Schwartz on Smalltalk
Smalltalk, a language that has had a big influence on Ruby, is making a comeback. We take a look at the current situation and talk to Randal L. Schwartz about Smalltalk.
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DataNucleus Access Platform 1.0 (final) released
DataNucleus, the successor to the Java Persistence Platform JPOX, has released DataNucleus Access Platform 1.0.0 which provides access to a range of datastores for Java applications using JDO/JPA API's.