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• Is this a right way to use NHibernate?

  - by Venemo

  I spent the rest of the evening reading StackOverflow questions and also some blog entries and links about the subject. All of them turned out to be very helpful, but I still feel that they don't really answer my question. So, I'm developing a simple web application. I'd like to create a reusable data access layer which I can later reuse in other…

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• SOAP and NHibernate Session in C#

  - by Anonymous Coward

  In a set of SOAP web services the user is authenticated with custom SOAP header (username/password). Each time the user call a WS the following Auth method is called to authenticate and retrieve User object from NHibernate session: [...] public Services : Base { private User user; [...] public string myWS(string username, string…

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• Phantom updates due to decimal precision on calculated properties

  - by Jamie Ide

  This article describes my problem. I have several properties that are calculated. These are typed as decimal(9,2) in SQL Server and decimal in my C# classes. An example of the problem is: Object is loaded with a property value of 14.9 A calculation is performed and the property value is changed to 14.90393 When the session is flushed,…

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• Correct model for a database with a table for each user.

  - by BAH

  Kinda stuck here... I have an application with lets say 5000 rows of data per user and was wondering if it was right or wrong to do it this way: On user account creation a new table is created (UserData_[UserID]) or should I just have 1 table for userdata and have everything in there with a column for userid? The reason I am stuck at…

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• AutoMapping Custom Collections with FluentNHibernate

  - by ScottBelchak

  I am retrofitting a very large application to use NHibernate as it's data access strategy. Everything is going well with AutoMapping. Luckily when the domain layer was built, we used a code generator. The main issue that I am running into now is that every collection is hidden behind a custom class that derives from List<. For…

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• Select n+1 problem

  - by Arnis L.

  Foo has Title. Bar references Foo. I have a collection with Bars. I need a collection with Foo.Title. If i have 10 bars in collection, i'll call db 10 times. bars.Select(x=x.Foo.Title) At the moment this (using NHibernate Linq and i don't want to drop it) retrieves Bar collection. var q = from b in…

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• NHibernate: Mapping different dynamic components based on a discriminator

  - by George Mauer

  My domain entities each have a set of "fixed" properties and a set of "dynamic" properties which can be added at runtime. I handle this by using NHibernate's dynamic-component functionality. public class Product { public virtual Guid Id { get; } public virtual string Name { get; set;} public virtual…

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• nHibernate, Automapping and Chained Abstract Classes

  - by Mr Snuffle

  I'm having some trouble using nHibernate, automapping and a class structure using multiple chains of abstract classes It's something akin to this public abstract class AbstractClassA {} public abstract class AbstractClassB : AbstractClassA {} public class ClassA : AbstractClassB {} When I attempt to…

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• Using NHibernate's HQL to make a query with multiple inner joins

  - by Abu Dhabi

  The problem here consists of translating a statement written in LINQ to SQL syntax into the equivalent for NHibernate. The LINQ to SQL code looks like so: var whatevervar = from threads in context.THREADs join threadposts in context.THREADPOSTs on…

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• Using a custom IList obtained through NHibernate

  - by Abu Dhabi

  Hi.I'm trying to write a web page in .NET, using C# and NHibernate 2.1. The pertinent code looks like this: var whatevervar = session.CreateSQLQuery("select thread_topic, post_time, user_display_name, user_signature, user_avatar, post_topic, post_body from THREAD, [USER], POST, THREADPOST where…

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• How to configure RetryAdvice and ExceptionTranslation for Deadlocks using NHibernate and Spring

  - by zoidbeck

  Hi, i am using Spring.net 1.2 with NHibernate 2.0.1. Within my project i'am facing some Deadlock issues and besides the database tweaks to minimize the occurence i would like to implement Springs RetryAdvice to handle this. I can't find any working example how to configure a this. The reference…

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• NHibernate update using composite key

  - by Mahesh

  Hi, I have a table defnition as given below: License ClientId Type Total Used ClientId and Type together uniquely identifies a row. I have a mapping file as given below: <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" auto-import="true"> <class…

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• Error: "Cannot simultaneously fetch multiple bags" when calling Configuration.BuildSessionFactory();

  - by Nick Meldrum

  We are getting this error after upgrading to NHibernate 2.1. [QueryException: Cannot simultaneously fetch multiple bags.] NHibernate.Loader.BasicLoader.PostInstantiate() +418 NHibernate.Loader.Entity.EntityLoader..ctor(IOuterJoinLoadable persister, String[]…

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• Injecting Dependencies into Domain Model classes with Nhibernate (ASP.NET MVC + IOC)

  - by Sunday Ironfoot

  I'm building an ASP.NET MVC application that uses a DDD (Domain Driven Design) approach with database access handled by NHibernate. I have domain model class (Administrator) that I want to inject a dependency into via an IOC Container such as Castle Windsor,…

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• Multiple SessionFactories in Windows Service with NHibernate

  - by Rob Taylor

  Hi all, I have a Webapp which connects to 2 DBs (one core, the other is a logging DB). I must now create a Windows service which will use the same business logic/Data access DLLs. However when I try to reference 2 session factories in the Service App and…

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• Mapping relationships from multiple databases in NHibernate

  - by mannish

  I have a multi-database application configured with NHibernate. The entities that correspond to tables from each database are in their own separate assemblies (an assembly per database if you will). I have a need/desire to relate an entity from one database…

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• nhibernate mapping: delete collection, insert new collection with old IDs

  - by npeBeg

  my issue lokks similar to this one: (link) but i have one-to-many association: <set name="Fields" cascade="all-delete-orphan" lazy="false" inverse="true"> <key column="[TEMPLATE_ID]"></key> <one-to-many class="MyNamespace.Field,…

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• NHibernate many-to-many mapping

  - by Scozzard

  Hi, I am having an issue with many-to-many mapping using NHibernate. Basically I have 2 classes in my object model (Scenario and Skill) mapping to three tables in my database (Scenario, Skill and ScenarioSkill). The ScenarioSkills table just holds the…

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• NHibernate will not insert a record

  - by Brian Beckham

  I have an application that is now 4+ years old that is exhibiting some odd behavior on our latest deployment. The application uses nHibernate for all inserts / updates / selects, etc. We are currently using .NET 2.0, and nHibernate 1.2 (I know, we…

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• managing classes when everything is relative to a user in nhibernate (orm)

  - by Schotime

  Firstly I have three entities. Users, Roles, Items A user can have multiple Roles. An item gets assigned to one or more roles. Therefore a user will have access to a distinct set of items. Now there is a few ways I can see this working. …

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• Configure nHibernate for multiple-project solution

  - by NoOne

  Hello, Im doing a project with C# winforms. This project is composed by: Client project: Windows Forms where user will do CRUD operations on the models; Server project; Common Project: This project will hold the models (in the image only…

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• NHibernate Performance Optimization | Suggestions invited!!!

  - by user336749

  Hi, I’m facing an issue with NHibernate performance and can you please suggest me some optimizations? Below mentioned is a small summary of my application architecture I have a windows service which is listening to a messaging bus. On…

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• Using NHibernate's HQL to make a query with multiple inner joins

  - by Abu Dhabi

  The problem here consists of translating a statement written in LINQ to SQL syntax into the equivalent for NHibernate. The LINQ to SQL code looks like so: var whatevervar = from threads in context.THREADs join…

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• NHibernate Entity code conversion from #C to VB.Net

  - by CoderRoller

  Hello and thanks for your help in advance. I am starting on the NHibernate world and i am experimenting with the NHibernate CookBook recipes, i am trying to set a base entity class for my entities and this is the C# code for this. I…

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• FluentPath: a fluent wrapper around System.IO

  - by Bertrand Le Roy

  .NET is now more than eight years old, and some of its APIs got old with more grace than others. System.IO in particular has always been a little awkward. It’s mostly static method calls (Path.*, Directory.*, etc.) and some stateful…

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