I am trying to map the following: public class Person{ ... @ManyToMany(cascade = { CascadeType.PERSIST, CascadeType.MERGE }) @JoinTable(name = "person_categories", joinColumns = @JoinColumn(name = "personId"), inverseJoinColumns = @JoinColumn(name = "categoryId")) private Set<Category> categories ... } public class Category ...
Is there a recommend way to get Spring 2.5+ to autowire Hibernate (3.0+) domain objects. I realize that there is a way to do this using AspectJ (@Configurable), but I would like to avoid pulling in AspectJ. Some Googling found this DependencyInjectionInterceptorFactoryBean class but it seems to just live in the sandbox (and just in 2.0....
Can LINQ-To-SQL be used Asynchronously? Are there any OR Mappers that allow Asynchronous operations? CLOSED: See http://stackoverflow.com/questions/252355/how-to-write-asynchronous-linq-query ...
For some of the apps I've developed (then proceeded to forget about), I've been writing plain SQL, primarily for MySQL. Though I have used ORMs in python like SQLAlchemy, I didn't stick with them for long. Usually it was either the documentation or complexity (from my point of view) holding me back. I see it like this: use an ORM for ...
Hi, I got an Java application using SQL tables that contains an ordered list of entities, ordered by an order column. I would like to add/remove things in/from the middle of the list. Now, I'm wondering if some persistence framework / orm / you-name-it could provide this kind of functionality with batch update of order column. At the...
I was looking for Object Relational Mappers on Google and found this ORM (TierDeveloper O/R mapper). Has someone tried it? What were your experiences with it? Is it easier to use than other ORMs? ...
I am concerned whether Rails can handle the types of complex aggregations that are needed for a financial application and particularly whether the ORM can handle these effectively. In a financial application that I am thinking of using this for, there is a need to do lots of reporting of detailed financial data, aggregated in various way...
Has anyone used this ORM? link Critiques/Praise? I work in an office that is heavily invested in other telerik venues and I would like to know more about their newest product and whether or not it should be avoided. ...
Hi there is there a way how to use Zend_Db relations for setting related objects? I am looking for something like following code: $contentModel = new Content(); $categoryModel = new Category(); $category = $categoryModel->createRow(); $category->setName('Name Category 4'); $content = $contentModel->createRow(); $content->setTitle(...
Below is a sample implementation of overriding Object.Equals() for an entity base class from which all other entities in an application derive. All entity classes have the property Id, which is a nullable int. (It's the primary key of whatever table the entity class corresponds to.) public override bool Equals(object obj) { ...
I am re-designing part of our internal ORM tool, and I want to expose Field (a class that represents a field in the database, like CustomerFirstName) directly to the end-developer. So that was easy enough to accomplish, however the API got a little ugly because this Field class was previously used internally and is too open. For instanc...
I need a .Net ORM, and I heard some good things about this. I've had NHibernate running in the past, but this seems to make a lot of things easier. However, two things made me a little nervous. It uses NHibernate 1.2, which seems old It's still an RC with its last release 18 months ago Is anyone using it, and do they recommend it f...
I understand the reason behind not auto refreshing your .dbml (Linq2Sql), .edmx (Linq2Entities) or .hbm.xml (NHibernate). In each of these ORM solutions you need to update these files if you have changes in the database. Is there a way to refresh these files automatically if you are 100% sure that it wont break anything? I am reasonably...
I've got some classes that have properties like this, and they work perfectly because they are very normal: Public Overridable Property CustomerLastName() As String Get Return m_CustomerLastName.Value End Get Set(ByVal Value As String) m_CustomerLastName.Value = Value End Set ...
We are developing an application with a persistence layer using OpenJPA1.1 and an Oracle DB as backend storage. I will use queries with subselects (see my question at Solving JPA query finding the last entry in connected list). Now my colleagues at work remark, that such queries can lead to performance problems as the database is fille...
Hey there, I want to know if there is way to create a database out of existing classes with the ado.net entity framework or to map existing classes to a database. I looked for tutorials and only found ways to create the classes with the entity model designer. As an example I have the class Bird with Properties Length and Age On the...
I'm familiar with ORM as a concept, and I've even used nHibernate several years ago for a .NET project; however, I haven't kept up with the topic of ORM in Java and haven't had a chance to use any of these tools. But, now I may have the chance to begin to use some ORM tools for one of our applications, in an attempt to move away from a ...
Okay, here's one for the pro's: For a couple of years now, i've been working on my own PHP ORM/ActiveRecord implementation that i named Pork.dbObject. It's loosly based on the 'make your own site with rails in 5 minutes' movie we all saw a couple of years ago. You can do things like: $clients = dbObject::Search("Client", array("ID > 5...
I have an entity Promotion, which has 3 simple fields (id, name, description) and all 3 will be mapped to DB. So far so good. Problem is with the 4th field, ruleModel, which is an instance of RuleModel and when constructed at runtime, it will contain object instances of a dozen other classes. I don't want to map RuleModel to a DB table, ...
Are there any Python object-relational mapping libraries that, given a database schema, can generate a set of Python classes? I know that the major libraries such as SQLObject, SQLAlchemy, and Django's internal SQL ORM library do a very good job of creating a DB schema given a set of classes, but I'm looking for a library that works in r...