NHIBERNATE QUESTIONS

Saving child collections with NHibernate

will be helpful for those in need You need to set the cascade attribute on your mapping so that persistence is cascaded to the child objects:

TAG : nhibernate

Date : January 10 2021, 01:57 PM , By : Govind Bhavan

ActiveRecord Mapping

To fix the issue you can do We ran into a similar issue at our end. To improve performance we added the FetchEnum.Join to the BelongsTo attribute and that did the trick for us.

TAG : nhibernate

Date : January 10 2021, 01:49 PM , By : helloedwin

Nhibernate FieldNameLookup throws IndexOutOfRangeException

it helps some times We - and others - have also encountered this problem. It seems to be related to multi-threaded access to the not-thread-safe SqlConnection. The following really long post contains more examples and some more detail on the issue: S

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : LUK

NHibernate stored procedure problem

will help you Well, where is your class mapping for SomeClass?You still need to map it. Read http://nhibernate.info/doc/nh/en/index.htmlquerysql-load.

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : Mark

NHibernate: Mapping multiple classes from a single table row

fixed the issue. Will look into that further You should use a Component in your NHibernate mapping file. For example:

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : user184975

Visual NHibernate from Slyce

will help you Right, first let me say you are on the right track. Visual NHibernate has come a long way from a tool to generate NHibernate Mappings and Classes from just Microsoft SQL Server to a tool that does all the major Databases (I am biased ca

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : aspitzer

NHibernate: bidirectional many-to-one problem

around this issue Unless you're willing to make the foreign key nullable and accept an insert followed by an update, that's the way bidirectional one-to-many works in NHibernate.I do have a generic implementation of this pattern that you can use... i

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : orlandoferrer

Why doesn't nHibernate support LIMIT when doing "join fetch"?

hope this fix your issue It looks like nHibernate is trying to populate the whole child collection by always doing an outer join on eagerly loaded collections, which results in a nonidentical set of rows with identical left part.

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : lamberms

Making OR/M loosely coupled and abstracted away from other layers

I hope this helps . It sounds like you are looking for the repository pattern. If you need more decoupling, you can inject the data dependencies with an Inversion of Control container.

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : rhinojosa

Where is the NHibernate 3.0 source repository?

hop of those help? NHibernate 3.0 is also known as the trunk. It has not been officially released yet.You can find the source code in SVN here:

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : RichAA

Nhibernate Auditing

it should still fix some issue If you don't want to build your own audit solution, maybe you should have a look at NHibernate Envers? https://bitbucket.org/RogerKratz/nhibernate.envers

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : cameron

fluent nhibernate named-query without using hbm file for the map

around this issue Maybe I'm misreading the question, but you don't have to switch to hbm mapping completely.You could continue to use fluent NHibernate to map classes and use hbm for named queries only. In your configuration, you'd then include the e

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : Tigre

SQLite with TransactionScope and Increment Identity Generator

Hope this helps There are two things at play here.As you mentioned, System.Data.SQLite will auto-enlist in distributed transactions. This is on by default and can turn it off by adding Enlist=no.

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : Bharath

Nhibernate get collection by ICriteria

I think the issue was by ths following , colleagues. I've got a problem at getting my entity. Mapping: , This is what I think the answer should be:

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : Shane

Extended properties with Entity Framework or NHibernate

this one helps. For NHibernate you can use dynamic-component http://nhibernate.info/doc/nh/en/index.htmlcomponents-dynamic or using the dictionary as a name-value list nhforge.org/doc/nh/en/index.htmlcollections-mapping or even Duck-Typing http://fab

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : Bimal Poudel

NHibernate HQL date functions

seems to work fine You can inherit from your dialect and register the properly function. For example, for MS SQL you can register the dateadd function:

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : keird

How can one fetch partial objects in NHibernate?

I hope this helps you . Use a projection to narrow the result set to the desired column(s) and a result transformer to convert the result into the type that you want.This will return transient objects rather than persistent entities.

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : mdiezb

What is the fastest way to clear out a database using NHibernate?

may help you . I intend to perform some automated integration tests. This requires the db to be put back into a 'clean state'. Is this the fastest/best way to do this?

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : Nathan Good

TypeInitializationException When Getting an NHibernate Session

help you fix your problem You will get this exception if your nhibernate config file is broken, or if any of NHibernate's dependencies are missing (eg log4net).The stacktrace will usually tell you what the problem is. Without seeing your config I can

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : Jesenko Mehmedbasic

How To Make NHibernate Automatically change an "Updated" column

help you fix your problem You can use the generated="always" for properties that are set/updated by the database. NHiberante will then issue a select for this column after the insert/update statement. example:

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : Kaputnik

NHibernate Linq Provider question

should help you out Session.Query is the class to use when you want to use the new and much improved linq provider in NHibernate 3.0. If you are using linq and you are starting a new project, this is the class to use.Session.Linq is the class to use

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : Helpful Dude

NHibernate.Linq to Criteria API translation help needed

Any of those help In link to do paging you use the commands Skip and Take.Your scenario:

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : kgw

Fluent NHibernate and PostgreSQL, SchemaMetadataUpdater.QuoteTableAndColumns - System.NotSupportedException: Specified m

may help you . I'm using fluentnhibernate with PostgreSQL. Fluentnhibernate is last version. PosrgreSQL version is 8.4. My code for create ISessionFactory: , Try this:

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : Keonne Rodriguez

Why use Hibernate/nHibernate?

I hope this helps . I was asked this question at an interview, and I couldn't justify my answer completely ewven though I have been using hibernate for 5+ years - it has become a defacto standard for me. Having researched found satisfying answer in t

TAG : nhibernate

Date : January 02 2021, 06:48 AM , By : Adam Hill

Selecting an object from the GroupBy key

this will help It's a known NHibernate issue NH-3027.As a workaround you can use last approach described in this answer (rewrite GroupBy part as sub-query). So your query can be rewritten to something like:

TAG : nhibernate

Date : December 28 2020, 02:06 PM , By : Zinovate

One-to-one or many-to-one mapping using primary key of each table

I wish this help you It's a known issue (PR with suggested fix is here). For now as a workaround in LINQ you can call Count on some non-ID and not-nullable property:

TAG : nhibernate

Date : December 27 2020, 03:23 PM , By : Hunter

Mapping a collection of Interface with NHibernate Mapping ByCode

hop of those help? With FluentNHibernate I mapped a collection of interface by specifying the concrete type in the mapping class. I'm trying to convert to Maping.ByCode. , Try setting Class:

TAG : nhibernate

Date : December 23 2020, 01:01 PM , By : Steve Jones

NHibernate mapping by code ManyToMany

this one helps. The answer to this problem cannot be found in the files above. I just forgot to add the AppPrivilegeMap to the ModelMapper during NHibernateHelper.OnConfigure().Now the last task is to find out where to put the .Inverse(true), so seri

TAG : nhibernate

Date : November 22 2020, 09:00 AM , By : Kubla Khan

Self referencing entity in NHibernate gives object references an unsaved transient instance exception

To fix this issue Your error message gave you two options: Save the transient instance before flushing Set cascade action for the property to something that would make it autosave

TAG : nhibernate

Date : November 16 2020, 11:00 PM , By : wpoch

NHibernate: Select one to Many Left Join - Take X latest from Parent

I hope this helps you . The way I would go here is: load the list of root entity (Parent) and let NHibernate load their children lazily - in separated SQL query.

TAG : nhibernate

Date : November 16 2020, 06:23 AM , By : matthew

NHibernate: cannot call QueryOver<T>().List() from IronPython

it helps some times I have figured it out:The "weird" definition in https://github.com/nhibernate/nhibernate-core/blob/master/src/NHibernate/Criterion/QueryOver.csL223 is an explicitly implemented interface-method. According to https://docs.microsoft

TAG : nhibernate

Date : November 03 2020, 04:01 AM , By : zdyne

How to get List of Parent Entities with Child Count In Nhibernate QueryOver

I wish this help you I have two classes : , Using this DTO for projection:

TAG : nhibernate

Date : November 01 2020, 04:09 PM , By : Verbal

NHibernate Lazy Initialized collection on WCF Wire

I think the issue was by ths following , There is no magic bullet to 'unlazy' a collection. You would most likely trigger the SELECT+1 problem. You really need to perform an eager load on object graph.You can do this in your mappings, but I recommend

TAG : nhibernate

Date : October 26 2020, 11:52 AM , By : n1ckless_id

Spring.net with NHibernate and the "No Hibernate Session bound to thread error"

it helps some times I know this is an old question, but have you got the Open Session In View module defined in your web.config file?For IIS6, it should be something like:

TAG : nhibernate

Date : October 26 2020, 11:52 AM , By : msugar

NHibernate does not create Tables

I hope this helps you . Your most likely problems: using SQLite with connection.release_mode=on_close no mapping files in the specified assembly mapping files have not been added to the assembly as an Embedded Resource mapping files are not named *.h

TAG : nhibernate

Date : October 26 2020, 11:52 AM , By : jonagh

nhibernate cache problem with linq queries

I hope this helps . Seems to be a problem with using .Select() as in .Select(x=>x) For some reason the cache is bypassed when using the select. Any other statements work fine like OrderBy(), Where() etcSample code below:

TAG : nhibernate

Date : October 21 2020, 11:12 AM , By : cameron

NHibernate vs EF4 - Performance on Low End Computer

To fix this issue I don't think the difference between the two is even measurable with a small amount of data. The sql query itself will take much longer than the work done by the orm. Yes, this is a wide open subject. You will only know the differen

TAG : nhibernate

Date : October 20 2020, 11:12 PM , By : Saurabh

NHibernate Caching Dilemma

I hope this helps . Stop using your transactional ( OLTP ) datasource for analytical ( OLAP ) queries and the problem goes away.When a domain significant event occurs (eg a new entity enters the system or is updated), fire an event ( a la domain even

TAG : nhibernate

Date : October 20 2020, 11:12 AM , By : vdavidovski

Join tables with nested select count and group by in Nhibernate HQL

I think the issue was by ths following , For what you are trying to do, you do need to write any HQL query Since you have collections in your classes and you have mapped them in your .hbm.xml files like (if you are using fluent nhibernate ignore this

TAG : nhibernate

Date : October 16 2020, 11:12 AM , By : Murali Ravipudi

NHibernate: Subqueries.Exists not working

seems to work fine Try to create criteria or alias on the path of Foo in the Bar class in your subquery and then apply the eaual restriction.

TAG : nhibernate

Date : October 15 2020, 11:12 PM , By : Pavel K.

HasOne vs References Mapping Fluent NHibernate

fixed the issue. Will look into that further I think you want to use the References mappingHasOne means that the 2 entities that you are mapping together share a "mutually exclusive" identifier

TAG : nhibernate

Date : October 15 2020, 11:12 PM , By : user165871

Inconsistent SQLDateTime Overflow with NHibernate

Any of those help Are you running SQL Server 2008? I ran into this same error today when using SQL Server 2008. On the database I had set the column to "date" instead of "datetime" because I do not care about the time portion. But there isn't a "date

TAG : nhibernate

Date : October 15 2020, 11:12 AM , By : George Handlin

How to construct NHibernate criteria to find parents who has all specified children

it fixes the issue yesterday I was working on the similar problem. I had to select/load all parent-objects with exactly the given list of child-objects. I could solve this with the Criteria-API, with only one drawback (see *1 below).

TAG : nhibernate

Date : October 14 2020, 01:07 PM , By : Habikki

nHibernate collections and alias criteria

wish helps you You made your query on the School class and you restricted your results on it, not on the mapped related objects.Now there are many ways to do this. You can make a static filter as IanL said, however its not really flexible. You can ju

TAG : nhibernate

Date : October 14 2020, 12:44 PM , By : user109285