Tagged Questions

0
votes
2answers
167 views

Mapping a legacy database to ORM using wrapper classes

I want to use an ORM with a legacy database, but I don't want to expose some of the underlying data types. For example, some of the columns are nullable doubles or floats and I want my domain model to ...
5
votes
1answer
179 views

Entity Framework as a type checking/verification system for database code

When I read pro and con lists of using Entity Framework (or any modern ORM really), I'm surprised that the following point doesn't arise (self quote): Using strongly-typed domain entities allows ...
5
votes
3answers
390 views

Should we have a database independent SQL like query language in Django?

Note : I know we have Django ORM already that keeps things database independent and converts to the database specific SQL queries. Once things starts getting complicated it is preferred to write raw ...
7
votes
3answers
352 views

Creating a layer of abstraction over the ORM layer

I believe that if you have your repositories use an ORM that it's already enough abstracted from the database. However, where I am working now, someone believe that we should have a layer that ...
5
votes
2answers
108 views

Database Change Auditing - Part of or Abstracted from ORM / Application Layer?

My fellow developers and I are at a crossroads in how to go about continuing our auditing of database changes. Most of our applications log changes via INSERT, UPDATE, and DELETE triggers. A few of ...
2
votes
2answers
142 views

ORM has schema to generate classes, does the reverse exist?

In Entity-Framework, you can create a DB schema, and then generate your ORM classes. Is there any software that does this in reverse? For example you create a few classes that have relationships, ...
10
votes
5answers
550 views

For an ORM supporting data validation, should constraints be enforced in the database as well?

I have always applied constraints at the database level in addition to my (ActiveRecord) models. But I've been wondering if this is really required? A little background I recently had to unit test a ...
1
vote
2answers
214 views

Pro's/Con's to database table layout as it relates to maintenance & extensibility

Basic pseudo class layout below... class Location(): # Class containing information about a location. id address_one class CustomerLocation(Location): customer_id account_rep class ...
5
votes
2answers
247 views

Immutable design with an ORM: How are sessions managed?

If I were to make a site with a mutable language like C# and use NHibernate, I would normally approach sessions with the idea of making them as create only when needed and dispose at request end. ...
3
votes
1answer
134 views

Who's responsible for a master / slave switch?

We are introducing a master / slave replication schema in our web application. At certain scenarios we would prefer to explicitly direct reads to a slave and writes to the master, which to me is an ...
3
votes
6answers
613 views

Why are SQL databases still used with ORM?

ORMs and persistence ignorance make perfect sense: if I am programming in a language, then I want to use the language's native implementation of objects and data structures to drive my program. I ...
2
votes
1answer
89 views

Big table with referential integrity or field typification?

I'm using an ORM (Propel) and PHP to create Objects and store them in a database. So, I'm facing a recurrent problem and I'm pretty sure this happened to someone before. My data model looks something ...
4
votes
4answers
610 views

When is it necessary to use ORM tools?

I was raised in a part of web developmentland where the creation of websites is mostly synonymous with Wordpress, FTP, Joomla, and procedural code, instead of things like TDD, A/B testing, Doctrine, ...
6
votes
4answers
2k views

What are some best practices for populating and using a test database?

So, I'm developing some database-driven RESTful Java web services, using Hibernate and MySQL. For testing purposes, I'm using the H2 in-memory database. H2 is nice and fast, so this has worked out ...
16
votes
7answers
3k views

How to suggest using an ORM instead of stored procedures?

I work at a company that only uses stored procedures for all data access, which makes it very annoying to keep our local databases in sync as every commit we have to run new procs. I have used some ...
1
vote
2answers
223 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 ...
3
votes
5answers
653 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 ...
11
votes
3answers
509 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 ...
11
votes
4answers
873 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 ...