What is lazy loading in NHibernate?

What is lazy loading in NHibernate?

A more thorough answer: Lazy loading is the default in NHibernate. So if you are not doing anything to circumvent it, you are going to use lazy loading. With lazy loading you can use nested objects (with many relationships to other tables) and it is going to work fine. They are loaded from the database as needed.

What is NHibernate Projection?

The “projection” is kind of like plucking out what data you will need so that NHibernate only asks the database for just that data when it makes the SQL.

How do you use fluent NHibernate?

Basic Setup of Fluent NHibernate

  1. Step 1: Create the Database and Table.
  2. Step 2: Create a Console App (.
  3. Step 3: Create Your Entities/Classes.
  4. Step 4: Create the Mapping (Entities to DB Tables)
  5. Step 5: Create the NHibernate Configuration.
  6. Step 6: Read and Write to the DB Table.

What is lazy fetching in Hibernate?

Lazy fetching decides whether to load child objects while loading the Parent Object. You need to do this setting respective hibernate mapping file of the parent class. Lazy = true (means not to load child) By default the lazy loading of the child objects is true.

What is QueryOver?

Note: QueryOver is intended to remove the references to ‘magic strings’ from the ICriteria API while maintaining it’s opaqueness. It is not a LINQ provider; NHibernate has a built-in Linq provider for this.

What is NHibernate session?

The NHibernate session encapsulates a unit of work as specified by the unit of work pattern.

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.

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.

Which is better NHibernate or entity framework?

EF Core can use a ROWVERSION/TIMESTAMP column on SQL Server, or any of a list of columns, when updating a record. NHibernate offers richer capabilities, besides SQL Server ROWVERSION/TIMESTAMP, it can also use database native mechanisms such as Oracle’s ORA_ROWSCN, but also timestamp or version columns.

Why we use lazy loading in hibernate?

The main purpose of lazy loading is to fetch the needed objects from the database. For example, we have a parent class, and that parent has a collection of child classes. Now, Hibernate can use lazy loading, which means it will load only the required classes, not all classes.

What is lazy loading in hibernate Javatpoint?

Lazy loading in hibernate improves the performance. It loads the child objects on demand. Since Hibernate 3, lazy loading is enabled by default, and you don’t need to do lazy=”true”. It means not to load the child objects when the parent is loaded.

Is NHibernate thread safe?

The NHibernate ISession is not thread-safe, that is, it shouldn’t be shared by multiple threads. The ISessionFactory, however, is thread-safe, and thus it should be used to create ISession instances as needed.