C# Класс Habanero.BO.ClassDefinition.PrimaryKeyDef

Manages the definition of the primary key in a for a particular Business Object (e.g. Customer). The Primary Key Definition defins the properties of the object that are used to map the business object to the database. The Primary key def is a mapping that is used to implement the Identity Field (216) Pattern (Fowler - 'Patterns of Enterprise Application Architecture') In most cases the PrimaryKeyDefinition will only have one property definition and this property definition will be for an immutable property. In the ideal case this property definition will represent a property that is globally unique. In these cases the primaryKeyDef will have the flag mIsGUIDObjectID set to true. However we have in many cases had to extend or replace existing systems that use mutable composite keys to identify objects in the database. The primary key definition allows you to define all of these scenarious. The Application developer should not usually deal with this class since it is usually created based on the class definition modelled and stored in the ClassDef.Xml XmlPrimaryKeyLoader.