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  • How to clear the entire second level cache in NHibernate

    - by Bittercoder
    I wish to clear the entire second level cache in NHibernate via code. Is there a way to do this which is independent of the cache provider being used? (we have customers using both memcache and syscache within the same application). We wish to clear the entire cache because changes external the database would have occurred (which we have no guarantees re: which tables/entities were affected).

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  • NHibernate criteria construction

    - by brianberns
    I am trying to recreate something like the following SQL using NHibernate criteria: select Range, count(*) from ( select case when ent.ID between 'A' and 'N' then 'A-M' else 'Other' end as Range from Subject ) tbl group by tbl.Range I am able to create the inner select as follows: session.CreateCriteria<Subject>() .SetProjection( Projections.Conditional( Expression.Between("Name", "A", "N"), Projections.Constant("A-N"), Projections.Constant("Other"))) .List(); However, I can't figure out how to pipe those results into a grouping by row count. Any suggestions? Thanks. -- Brian

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  • NHibernate dateTime as an ID Bad idea?

    - by Miau
    hi there I have an entity and it seems like using DateTime as the Id would be a good suit, however I there is this strange feeling that that it might be a terrible idea ( tho i cant come up with any logical reason as to why), This is an immutable object ( ie once the value is recorded it shouldn't really change ) So DateTime as id field in NHibernate yay or Nay? I would appreciate your comments on this

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  • NHibernate Query

    - by Nathan Roe
    Is it possible to get NHibernate to generate a query similar to the following with HQL or Criteria API? select * from ( select row_number() over ( partition by Column1 order by Column2 ) as RowNumber, T.* from MyTable T ) where RowNumber = 1 I can get it to execute the inner select using the formula attribute, but I can't figure out a way to write a HQL or Criteria query that lets me wrap the inner select in the outer one.

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  • SQLite connection pooling with Fluent NHibernate

    - by Groo
    Is there a way to setup SQLite connection pooling using Fluent NHibernate configuration? E.g. equivalent of DataSource=:memory: would be: var sessionFactory = Fluently .Configure() .Database(SQLiteConfiguration.Standard.InMemory) (etc.) Is there something eqivalent to "Pooling=True;Max Pool Size=1;"?

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  • NHibernate with StructureMap for a Non-Web Application

    - by Yoann. B
    Hi, What is best pratices for inject and manage Session/Transaction for NHibernate using StructureMap for a Non Web Application like an Windows Service ? In a web context, we use PerRequest Session management lifecycle using the Hybrid Lifecycle of StructureMap but for a Windows Service, i can't handle IDisposable UnitOfWork ... Thanks.

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  • NHibernate: inserting additional calculated column

    - by Andrey Shchekin
    What would be your approach with NHibernate to do the following: When Comment is inserted into DB, and its property Text is inserted into column Text (due to a mapping), insert into column TextHash a hash of this property value. It seems trivial if I map TextHash, but how should I do this without mapping it? I do not need it in the domain model, its a DB-level optimization (I would use computed HashBytes if not for the length limit).

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  • How do I map common properties in NHibernate

    - by Ian Oakes
    In the database I'm working with, every table repeats the same nine columns and I don't want to have to supply the same properties in each of my entities to map these columns. I've tried adding properties to a common base class and adding them to the sub class's mapping file, but this doesn't work. I've read the documentation around inheritance mapping but this did not help. What is the best way to map columns that repeat accross multiple tables in NHibernate?

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  • NHibernate Left Outer Join

    - by Matthew
    I'm looking to create a Left outer join Nhibernate query with multiple on statements akin to this: SELECT * FROM [Database].[dbo].[Posts] p LEFT JOIN [Database].[dbo].[PostInteractions] i ON p.PostId = i.PostID_TargetPost And i.UserID_ActingUser = 202 I've been fooling around with the critera and aliases, but I haven't had any luck figuring out how do to this. Any suggestions?

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  • Using NHibernate to insert/update using a SQL server-side DEFAULT value

    - by Joseph Daigle
    Several of our database tables contain LastModifiedDate columns. We would like these to stay synchronized based on a single time-source. Our best time-source, in this case, is the SQL Server itself since there is only one database server but multiple application servers which could potentially be off sync. I would like to be able to use NHibernate, but have it use either GETUTCDATE() or DEFAULT for the column value when updating or inserting rows on these tables. Thoughts?

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  • NHibernate mapping in Asp.Net using MySql

    - by Siva
    Hi, I'm new to NHibernate. Actually I'm trying to save the values ffrom two text boxes into MySql Database in asp.Net page. I that I got "Resource not found: WebApplication1.Sample.hbm.xml" error. But I can't fix this error. Can anyone help me to fix this one?

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  • versioning in Fluent NHibernate

    - by csetzkorn
    In my NHibernate mapping files I used: <version name="Version" column="Version" /> to implement versioning. How do I achieve this using fnhibernate? What should go in here? public class blaMap : IAutoMappingOverride<bla> { public void Override(AutoMapping<bla> mapping) { ???? } } thanks. christian

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  • NHibernate : recover session after connection lost

    - by Catalin DICU
    I'm using NHibernate with SQL Server 2005 in a WPF client application. If I manually stop the SQL Server service and then restart it the session doesn't automatically reconnect. So far I'm doing this witch seems to work : try { using (ITransaction transaction = this.Session.BeginTransaction()) { // some select here } }catch(Exception ex) { if(this.Session.Connection.State == ConnectionState.Closed) { try { this.Session.Connection.Open(); } catch (Exception) { } } } Is there a better way ?

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  • Fluent Nhibernate Order-By on Collection

    - by madcapnmckay
    Hi, If I have a collection mapped in Fluent NHibernate and I want to apply an order to that collection how do I do that? Eg: HasMany(x => x.PastDates) .AsBag().Cascade .SaveUpdate() .KeyColumnNames.Add("EventId") .Where(e => e.DateFrom < DateTime.Now.Date) .Inverse(); I'm looking for the equivalent of the order-by attribute in HBM files. Thanks

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  • Visual NHibernate from Slyce

    - by dotnetdev
    I found this tool Visual NHibernate at http://www.slyce.com/, but a search on here has not brought anything up for what I would have thought would have been a very popular product, in concept anyway. Has anyone used this product? Any feedback on it? Thanks

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  • How can one fetch partial objects in NHibernate?

    - by mark
    Dear ladies and sirs. I have an object O with 2 fields - A and B. How can I fetch O from the database so that only the field A is fetched? Of course, my real application has objects with many more fields, but two fields are enough to understand the principal. I am using NHibernate 2.1. Thanks.

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  • NHibernate + Sql Compact + IoC - Connection Managment

    - by Michael
    When working with NHibernate and Sql Compact in a Windows Form application I am wondering what is the best practice for managing connections. With SQL CE I have read that you should keep your connection open vs closing it as one would typically do with standard SQL. If that is the case and your using a IoC, would you make your repositories lifetime be singletons so they exist forever or dispose of them after you perform a "Unit of Work". Also is there a way to determine the number of connections open to Sql CE?

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  • nhibernate intercept select query

    - by mjmcloug
    Hey, I'm looking at the nhibernate interceptor. It seems to be able to intercept save, update and delete queries but is there anyway I can intercept a select query. The problem I have is that I automatically want to append some additional sql filters to the executing sql statement in certain cases. Any thoughts Thanks Mat

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  • How to do a proper search with nhibernate

    - by Denis Rosca
    Hello everyone, i'm working on a small project that is supposed to allow basic searches of the database. Currently i'm using nhibernate for the database interaction. In the database i have 2 tables: Person and Address. The Person table has a many-to-one relationship with Address. The code i've come up with for doing searches is: public IList<T> GetByParameterList(List<QueryParameter> parameterList) { if (parameterList == null) { return GetAll(); } using (ISession session = NHibernateHelper.OpenSession()) { ICriteria criteria = session.CreateCriteria<T>(); foreach (QueryParameter param in parameterList) { switch (param.Constraint) { case ConstraintType.Less: criteria.Add(Expression.Lt(param.ParameterName, param.ParameterValue)); break; case ConstraintType.More: criteria.Add(Expression.Gt(param.ParameterName, param.ParameterValue)); break; case ConstraintType.LessOrEqual: criteria.Add(Expression.Le(param.ParameterName, param.ParameterValue)); break; case ConstraintType.EqualOrMore: criteria.Add(Expression.Ge(param.ParameterName, param.ParameterValue)); break; case ConstraintType.Equals: criteria.Add(Expression.Eq(param.ParameterName, param.ParameterValue)); break; case ConstraintType.Like: criteria.Add(Expression.Like(param.ParameterName, param.ParameterValue)); break; } } try { IList<T> result = criteria.List<T>(); return result; } catch { //TODO: Implement some exception handling throw; } } } The query parameter is a helper object that i use to create criterias and send it to the dal, it looks like this: public class QueryParameter { public QueryParameter(string ParameterName, Object ParameterValue, ConstraintType constraintType) { this.ParameterName = ParameterName; this.ParameterValue = ParameterValue; this.Constraint = constraintType; } public string ParameterName { get; set; } public Object ParameterValue { get; set; } public ConstraintType Constraint { get; set; } } Now this works well if i'm doing a search like FirstName = "John" , but not when i try to give a parameter like Street = "Some Street". It seems that nhibernate is looking for a street column in the Person table but not in the Address table. Any idea on how should i change my code for so i could do a proper search? Tips? Maybe some alternatives? Disclaimer: i'm kind of a noob so please be gentle ;) Thanks, Denis.

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