Object-relational mapping (ORM) is a technique for mapping between object-oriented systems and relational databases.

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Should I choose Doctrine 2 or Propel 1.5/1.6, and why? [closed]

I'd like to hear from those who have used Doctrine 2 (or later) and Propel 1.5 (or later). Most comparisons between these two object relational mappers are based on old versions -- Doctrine 1 versus ...
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3answers
449 views

PHP ORM style of querying

Ok so I have made an ORM library for PHP. It uses syntax like so: *(assume that $business_locations is an array)* Business::type(Business:TYPE_AUTOMOTIVE)-> ...
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2answers
283 views

How does an agile process deal with ORM?

This question was prompted by this answer, where I quote,"agile + ORM on a large constantly changing database is brutal". So, how can an agile process deal with a constantly changing database? I am ...
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7answers
1k views

Best arguments for/against introducing ORM technology into a companies dev process [closed]

I have started using ORM technology in the last few years. My first exposure was NHibernate. I then moved onto Linq 2 Sql, and Entity Framework. The issue I have however is, there are some ...
3
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5answers
1k views

Do you test your SQL/HQL/Criteria?

Do you test your SQL or SQL generated by your database framework? There are frameworks like DbUnit that allow you to create real in-memory database and execute real SQL. But its very hard to use(not ...
12
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3answers
905 views

Does ORM promote database de-normalisation?

Doctrine and Propel both make use of single and concrete table inheritance to map object relationships. The former sees all possible fields in the class tree mapped to a single table - whereas the ...
12
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4answers
1k views

What would you think about a new Java persistence tool, that's not really an ORM? [closed]

Persistence in Java Over the past years, I have gathered experience in the field of persistence abstraction in Java, using concepts such as EJB 2.0, Hibernate, JPA and home-grown ones. They seemed to ...
4
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2answers
523 views

ORM domain design pitfalls

Are there any patterns which seem sensible when designing an object oriented domain, but do not translate nicely onto a relational database schema? If so, are there standard patterns that can be used ...
7
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3answers
6k views

What is the best PHP ORM library? [closed]

I want to build a PHP web application, but always faces the problem that I need to connect to database and deal with related objects. So I tried codeigniter and it uses a special way to connect to ...
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7answers
2k views

Is Entity Framework ready for production? [closed]

I'm looking into Entity Framework for a new project that I'm going to be taking on and as part of my research into it I'm asking some industry professionals if it's stable and ready for 'real world' ...
3
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3answers
603 views

What are the non-technical reasons that make Object-Relational Mapping tools (ORMs) so difficult to write?

I know the technical pitfalls of writing an ORM are pretty well-known nowadays, but what are some non-technical factors (e.g., Scope) that make it difficult to writing a good ORM? EDIT: I have ...
28
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13answers
9k views

What are the criteria for evaluating an ORM for.NET? [closed]

I'm looking at evaluating ORMs. I've used SubSonic, Linq-to-SQL and Entity Framework. I've got a team of developers ranging from juniors to seniors. What are the criterias for evaluating an ORM ...
4
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1answer
224 views

CMP Entity Beans as a “naive” ORM solution

I was browsing through this talk about "Historically Bad Ideas" over the history of Computer Science, and found an interesting presentation about the rise & fall of the Java Enterprise ...
20
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14answers
2k views

What are the benefits of using database abstraction by ORM? [closed]

I'm starting to use the ORM recommended by the framework I choose, and though I like the idea of the added layer of abstraction the ORM provides, I'm starting to realize what this really means. It ...