Nhibernate why use

NET Core loggers. Just wanted to stop by a say thank you for writing this article. Your email address will not be published. Notify me when new comments are added. Skip to content. NET Data platform. SqlClient 4. NET Core 3. Generator Generators. Guid ; x. Type NHibernateUtil.

Column "Id" ; x. UnsavedValue Guid. Length 50 ; x. StringClob ; x. AddMappings typeof NHibernateExtensions. AutoQuote; c. Validate; c. BuildSessionFactory ; services. AddSingleton sessionFactory ; services. OpenSession ; services. GetConnectionString "DefaultConnection" ; services. AddNHibernate connStr ; services.

Injecting NHibernate to controllers We can now inject NHibernate mapper session to controllers and start querying for data. StartsWith "How to".

FirstOrDefaultAsync ; book. Following community best practices we can write the code above like shown here. Paging with NHibernate Paging is popular topic and I have previously written few blog posts about it. Skip skip. Take pageSize. StartsWith "B". Skip 1. Its feature list is growing and some things such as code-based mappings and automatic migrations have found a place in Entity Framework.

Moreover, it is now open-source , so they are now accepting pull requests as well. The number of contributors to the NHibernate project declines while the number of Entity Framework contributors increases.

There are three times as many commits to the Entity Framework source tree then to the NHibernate. Additionally, the number of commits to the NHibernate sources declined by 56 percent in last 12 months while the number of commits to the Entity Framework increased by 98 percent in the 12 months.

Perhaps all of the original NHibernate kids have moved on and thus the community is lacking a clear vision for new releases. Async Query and Save.

Connection Resiliency. Code-Based Configuration. Dependency Resolution. Custom implementations of Equals or GetHashCode on entity classes. Custom Code First Conventions. Configurable Migrations History Table. Multiple Contexts per Database. NET Framework. It handles persisting plain. NET objects to and from an underlying relational database. At the end of , JBoss, Inc. At the end of , JBoss stopped the support of the project; it is now entirely developed and led by the community.

This creates, in effect, a "virtual object database" that can be used from within the programming language. For example, when we develop a project using any OOP language there's a mismatch between the object model and the relational database.

This is because an RDBMS represents data in a tabular format whereas object-oriented languages, such as Java and C represent data as objects. Problem of Granularity: We can have more classes than database tables. Problem of Inheritance: A database does not support inheritance. Problem of Impedance mismatch: The mismatch between structural and data type representation in classes and databases.

Impedance mismatch For example, consider the following class with properties and Employee table with column and data type: It is clear from the preceding example that they differ in structure and data type representations we will review in more detail in later series. Now we can say that using Hibernate we can map each and every property of the Class with the relational table. NHibernate does all the database work. Eliminates the necessity to write SQL statements or create a stored query.

We can have all of our data access logic contained within our application. Data Cartography, not only will our queries be effective, but they will also be validated by the compiler. Therefore, if our underlying table structure changes, the compiler will alert us that we need to change our queries! Both offer first-level caching of entities. NHibernate goes one step further, and has second-level caching using a distributed cache provider, such as these:.

NHibernate can do validation using the companion project NHibernate Validator , or by implementing an interface this one has become somewhat legacy. EF Core uses Data Annotations validation , which is the de facto standard for doing validations in. This is one aspect where EF is quite ahead of NHibernate, even though there have been attempts to create a similar framework for it.

You can list all the versions of a schema, apply one explicitly or go back to a previous version. It should come with time, of course. EF can generate entities from the database, and you can even modify the default behavior by registering your own version of infrastructure services. NHibernate has so many features that it is easy to forget about one. With NHibernate, one can map pretty much any database, so there is always an option. EF Core is very easy to use, generally well documented, and this is something where NHibernate is far behind.

As of now, it can only be used in relatively simple scenarios — just consider the lack of support for table inheritance strategies. Having a. NET Core version is essential to me. Having the possibility of supporting non-relational databases using the same familiar APIs and concepts is something very appealing to me, but yet to see working.

EF Core does have a roadmap, which is a good thing. Considering all the effort Microsoft is putting into it — plus the added contribution of the developer community — we can expect the best out of it. New releases seem to be coming at a steady pace, and we can take part in the decision process, even though Microsoft has the final word. For NHibernate, things are a bit worse.

Currently the project is maintained by only a handful of developers, at most. Things do seem to be moving, after some years of stagnation, and a good example is the port to. However, without professional developers working full time on this, it is reasonable to assume that progress will not be as fast as with EF — but NHibernate has the lead, in my opinion. The decision process is not so transparent, from where I sit. With APM, server health metrics, and error log integration, improve your application performance with Stackify Retrace.

Try your free two week trial today. Entity Framework Core Roadmap. NHibernate Milestones. Prefix: Supported. NET Core 2. Click here to read more about the acquisition.