The inverse attribute must not be set to true … You use the inverse attribute to specify the ‘owner’ of the association. (An association can have only one owner, so one end has to be set to inverse, the other has to be set to ‘non inverse’). (Owner: inverse=false; Non-owner: inverse=true) In a one-to-many association, … Read more
There is my master piece… which I’m using to transform any level of projections depth. Take it and use it like this: .SetResultTransformer(new DeepTransformer<MyEntity>()) It could be used for any ValueType properties, many-to-one references and also for dynamic objects… public class DeepTransformer<TEntity> : IResultTransformer where TEntity : class { // rows iterator public object TransformTuple(object[] … Read more
I found the solution by using this answer to a similar question You create 2 folders in your project one for each version of log4net. Place each log4net.dll in its corresponding folder by adding an the file to the solution (not with add reference). You can set the copy to output directory property to copy … Read more
1.1) First-level cache First-level cache always Associates with the Session object. Hibernate uses this cache by default. Here, it processes one transaction after another one, means wont process one transaction many times. Mainly it reduces the number of SQL queries it needs to generate within a given transaction. That is instead of updating after every … Read more
Briefly: Always use transactions Don’t use Close(), instead wrap your calls on an ISession inside a using statement or manage the lifecycle of your ISession somewhere else. From the documentation: From time to time the ISession will execute the SQL statements needed to synchronize the ADO.NET connection’s state with the state of objects held in … Read more
To begin with, if you are using full ORM like Entity Framework or NHibernate, you should avoid implementing additional layer of Repository and Unit Of Work. This is because; the ORM itself exposes both Generic Repository and Unit Of Work. In case of EF, your DbContext is Unit Of Work and DbSet is Generic Repository. … Read more
I just come up to that question, and realized, that there is missing any answer. And it is a shame, while I do often point out this NHibernate documentation statement: 24. Best Practices Don’t use exotic association mappings. Good usecases for a real many-to-many associations are rare. Most of the time you need additional information … Read more
As almost always, NHibernate does have answer for this. What we are here trying to achieve would be a SQL Statement lookin like this: // final Request selection SELECT request.[RequestId] FROM [Request] request // Only requests, which are successful, and have Max(date) WHERE request.[RequestId] IN ( SELECT successResponse.RequestId as y0_ FROM [Response] successResponse // response … Read more
Fetching Collections is a difficult operation. It has many side effects (as you realized, when there are fetched more collections). But even with fetching one collection, we are loading many duplicated rows. In general, for collections loading, I would suggest to use the batch processing. This will execute more SQL queries… but not so much, … Read more