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NHIBERNATE QUESTIONS

Saving child collections with NHibernate
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
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
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
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
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
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
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"?
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
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?
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
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
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
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
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
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
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?
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?
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
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
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
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
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
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?
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
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
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
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
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
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
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
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
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
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"
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
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
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
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
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
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
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
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
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
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
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
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