What is the difference between NHibernate and fluent NHibernate?
Fluent NHibernate offers an alternative to NHibernate’s standard XML mapping files. Rather than writing XML documents, you write mappings in strongly typed C# code. This allows for easy refactoring, improved readability and more concise code.
What is NHibernate mapping?
NHibernate is a widely used open-source ORM solution for . NET Framework that is well-known for its great flexibility in mapping . NET classes to database tables, because it supports almost all kinds of such mapping ever needed by developers. However, its is also well-known for its complex mapping both fluent and XML.
How does NHibernate work?
NHibernate uses mapping files to guide its translation from the database to business objects and back again. As an alternative, you can use attributes on classes and properties, instead of mapping files. To keep things as simple as possible, we’re going to use mapping files in this article, rather than attributes.
Which is better NHibernate or entity framework?
Entity Framework Core uses fluent (code-based) configuration and fluent or attribute-based mappings. Custom conventions are very powerful in NHibernate, EF Core still doesn’t have them, and this is something that NHibernate is better at, right now. Both of them need mappings, in any form.
Is NHibernate free?
NHibernate is an object–relational mapping (ORM) solution for the Microsoft . NET platform. NHibernate is free and open-source software that is distributed under the GNU Lesser General Public License. NHibernate is a port of Hibernate.
Is ORM a framework?
ORM is yet another nerd-acronym, it is short for Object Relational Mapping. In a nutshell, an ORM framework is written in an object oriented language (like PHP, Java, C# etc…) and it is designed to virtually wrap around a relational database.
How do I create a NHibernate map?
This tutorial will talk you through the following:
- Installing NHibernate.
- Defining a simple business object class.
- Create an NHibernate mapping to load and save the business object.
- Configure NHibernate to talk to your local database.
- Automatically generate a database.
How do you join two tables in NHibernate?
List> olist = null; olist = (_session. CreateQuery(“Select pc.Id as Id, ” + “pct. DescEn as DescEn,pct.
What is the difference between NHibernate and Entity Framework?
Entity framework used code-based (fluent) configuration or attribute-based (fluent) mapping. NHibernate uses XML and Fluent configuration and mapping. NHibernate Attributes is used to provide attribute mapping. NHibernate provides custom conventions and EF doesn’t provide them.
Is NHibernate open source?
NHibernate is a mature, open source object-relational mapper for the . NET framework. It’s actively developed, fully featured and used in thousands of successful projects.
Is ORM better than SQL?
Another advantage of ORM is that it can offer better performance than standard SQL, especially when the developer is not that familiar with SQL. In these cases, the out-of-the-box performance ORM offers is often better than the lackluster SQL code.
Why we use ORM framework?
ORM implementation classes know how to write vendor-specific SQL, so you don’t have to. The most important reason to use an ORM is so that you can have a rich, object oriented business model and still be able to store it and write effective queries quickly against a relational database.
How to define many to one in NHibernate?
Next up for inspection is the element. This element is defined as: Much of the attributes on this element are identical to the ones that I outlined in the post about . 1, 2, 3, 6, 7, 9 and 11 are identical, and I am not going to cover them.
What does the many to one annotation mean in hibernate?
The @ManyToOne Annotation As we have seen in section 2, we can specify a many-to-one relationship by using the @ManyToOne annotation. A many-to-one mapping means that many instances of this entity are mapped to one instance of another entity – many items in one cart. The @ManyToOne annotation lets us create bidirectional relationships too.
How can we code such a model NHibernate?
If you dig a little further, you’ll find that, in most of his use cases, the additional properties don’t matter. They are used for auditing purposes, activation/deactivation, etc. So, how can we code such a model?
How to map many to many Association in hibernate?
With JPA and Hibernate, the most popular approach maps a many-to-many association to an attribute of type java.util.Set. That mapping hides the association table and makes the association very easy to use. But it also makes it impossible to map any additional columns that are part of the association table.
