Questions tagged [nhibernate]
The nhibernate tag has no usage guidance.
31 questions
27
votes
4
answers
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What are the most common mistakes and anti-patterns NHibernate user programmers make?
What are the most common mistakes and anti-patterns NHibernate user programmers make? Please explain why those are bad practices or give link to resource for further reading.
For example:
One anti-...
- 381
20
votes
7
answers
5k
views
Is writing your own Data Access / Data Mapping Layer a "good" idea?
We're currently in a situation where we have a choice between using an out-of-the-box object-relational mapper or rolling our own
We have a legacy application (ASP.NET + SQL Server) where the data-...
- 2,128
15
votes
5
answers
9k
views
If Repository Pattern is overkill for modern ORMs (EF, nHibernate), what is a better abstraction?
I've recently read a lot of arguments against using the repository pattern with powerful ORM's like Entity Framework as it incorporates repository-like functionality, along with Unit of Work ...
- 363
13
votes
2
answers
5k
views
Why is the Repository pattern needed in NHibernate?
I am reading the official Your first NHibernate based application.
While the tutorial is good and easy to follow, I am wondering why the Repository pattern is used.
In the various Add, Update, ...
- 311
11
votes
3
answers
8k
views
DDD with ORM where should the business logic go?
I have used an MDA (model driven architecture) tool in the past where we modeled via UML and this generated the business entities (our domain model) and the ORM (mapping etc) amongst other things.
A ...
- 1,289
8
votes
3
answers
7k
views
What is the "best" way to approach validation from the perspective of a DDD purist?
I recently asked this question.
I am trying to decide where to put the validation in a DDD app. I believe it should be done at every layer.
I am now concentrating on the Domain model. I was ...
- 7,129
8
votes
2
answers
1k
views
EF vs. NHibernate [closed]
In the past 2 years since I started writing business applications (before I did either high level front end or very low level systems programming), learned datasets, linq to sql, and now entity ...
- 5,673
7
votes
1
answer
6k
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Why should I use Iesi.Collections instead of the traditional System.Collection?
Was research on how (for convetion) define a Many Many where table where both fields are primary key and found this post.
So decide to install the Iesi.Collections in my library domain.
But there ...
- 225
5
votes
1
answer
236
views
Should I Use an ORM only when dealing with Data Model objects?
I am new to ORM, and we started developing a new system using NHibernate as the ORM.
I think this question may refer to any ORM and any language/platform.
The Team Leader has said we should use ...
- 1,339
4
votes
1
answer
398
views
What specific features of NHibernate cause it to be recommended for legacy database systems?
So, I've been evaluating Entity Framework and NHibernate (I'm not looking for an EF vs. NH battle here, though!).
One thing that I see come up very often is that NHibernate is recommended for "legacy"...
- 351
3
votes
2
answers
489
views
Is Microsoft's Entity Framework a proprietary variant of NHibernate?
I have no knowledge of Entity Framework and NHibernate but definitely want to learn. I want to know how to start. Whether to first read documentation of NHibernate or the default Visual Studio Entity ...
- 4,378
3
votes
2
answers
7k
views
What are the best practices to use NHibernate sessions in asp.net (mvc/web api)?
I have the following setup in my project:
public class WebApiApplication : System.Web.HttpApplication
{
public static ISessionFactory SessionFactory { get; private set; }
public ...
- 133
3
votes
2
answers
1k
views
Should I use nhibernate for a one row settings table
I am using nhibernate in a quite big project.
The system has a settings table which has 10 columns and one row, there is always a row and it should not be deleted only modified.
Concurrency can be a ...
- 213
3
votes
3
answers
257
views
Abstracton layer to control services access to denormalized db entity
Our db is optimized for minimum join count (partially denormalized). E.g. our User entity contains account data (nickname, facebook id, etc), user numerical statistics (total games played, total wins, ...
- 311
3
votes
1
answer
1k
views
Abstraction Layer over ORM Generated Entities
I am learning LINQ to SQL (and planning to learn Entity Framework). Initially I used a abstraction layer to convert LINQ to SQL entities into a domain objects. Later I discovered the “Inheritance ...
- 987
3
votes
0
answers
726
views
How to implement DDD in a distributed application with NHibernate?
I have an ASP.NET MVC web site working in this way:
(In the controller)
var user = _applicationService.GetUserById(1);
user.ChangeEmail("[email protected]");
user.ChangeAddress("my new street", ...
- 205
3
votes
2
answers
2k
views
NHibernate and complex domain model against a legacy database
I'm trying to refactor (actually, rewrite) an application which currently uses only stored procedures to access the database (hundreds of SPs). My goal is to use Nhibernate and follow a good design as ...
- 29
2
votes
3
answers
487
views
Should the domain layer be dependent on NHibernate?
Please see the code below:
public interface IUnitOfWorkWrite <TSession> : IDisposable
{
TSession Session { get; }
void Commit();
void Rollback();
...
- 7,129
2
votes
3
answers
548
views
Offline data that will need imported later
My existing application is a .NET 3.0 winform app that talks to a WCF service which in turn updates a MS SQL Server database; I can make changes at all spots (Windows client, WCF, server). I've had an ...
2
votes
1
answer
2k
views
What is the benefit of using sharp architecture?
I'm working in a project that use nhibernate as orm. Is there any benefit for me to use sharp architecture? what is these benefits?
- 121
2
votes
1
answer
115
views
How to make associations security proof
When designing an application I usually stumble upon a problem I've never quite managed to handle properly.
Suppose you have Products and Orders. Usually in my data-access layer I have repositories ...
user260171
2
votes
1
answer
2k
views
A multi tenant data architecture
We are at a planning & redesign stage of our loyalty card application. As it is understood it will be a multi-tenant application. And I need to take your thoughts. Here are the some key points we ...
erman olca
2
votes
1
answer
213
views
Testing controller logic that uses ISession directly
I have just read this blog post from Jimmy Bogard and was drawn to this comment.
Where this falls down is when a component doesn’t support a given
layering/architecture. But even with NHibernate, ...
- 109
1
vote
2
answers
590
views
What is the origin/meaning of the name 'NHibernate'?
Been poking around the web because I was curious as to why they called it that but haven't found anything yet. Anyone know?
(I checked the FAQ and it wasn't clear if questions on history/origins were ...
- 2,663
1
vote
1
answer
3k
views
One Session Factory for the lifetime of an application or one Session Factory per Unit of Work?
Please see the code below, which creates a Session Factory per Unit Of Work:
public int Update(IdentityRoleView role)
{
var role2 = AutoMapper.Mapper.Map<IdentityRole>(role);
...
- 7,129
1
vote
2
answers
1k
views
Unit test DAO code using SQL Lite when the application database is Oracle
We have an application with Oracle backend. The DAO layer is written in C# and uses nHibernet to perform the data operations.
To unit test our DAO code, we use SQL Lite which creates the database ...
- 21
1
vote
1
answer
1k
views
Is it ok to call external services or database inside the entity
I have "logic engine" which executes set of user configured steps. These steps are saved in the database as "Step" entities. The engine gets the first step and then executes steps until there are no ...
- 113
1
vote
0
answers
102
views
Can NHibernate's ISession be considered as implementation of unit of work pattern?
I am debating this with myself. Does NHibernate's ISession offer a proper and correct unit of work if used without a transaction? In absence of a transaction, every SQL command would be wrapped by the ...
- 297
1
vote
1
answer
2k
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.NET software design and Oracle ODP.NET UDT
I'm working on a new common .NET software design (mainly) for WCF-based web service applications with related client frontends (all written in C#). As far I've chosen some frameworks (NUnit,Autofac/...
- 11
0
votes
2
answers
603
views
In OnionArchitecture can UI talks directly to datastore or not?
I'm fan of onion architecture but looking for some relaxing solutions in some areas.
First of all I was thinking about communicating directly from UI (from controller in mvc) to data on the read side....
- 103
0
votes
2
answers
369
views
Definition of the NHibernate Mapping by Code / EF Code First pattern?
Sub-questions:
Does this pattern have a formal definition?
Who invented it?
Is it considered a DSL?
The reason why I am asking is because I would like to better assess its applicability to non-...
- 4,867