Nhibernate mapping config file build action
One of the most common mistakes in mapping is forgetting to set the build action to Embedded Resource. This leads to the "No Persister for class"
MappingException.
Avoid redundant mappings
Don't declare the column name, rules or constrain which is specified just as the Nhibernate does. Such as:
1) The property name is the same as column name of the mapping table
2) Every property in Nhibernate which is declared not-null="false" as default
Use natural key to present the identification in real world
<natural-id mutable="true">
<property name="UserName" not-null="true" />
</natural-id>
There is property for natural-id element, "mutable" whose default value is false; if you change value of the natural key or keys from time to time, please set this value to true.
Use
surrogate key for Identification of the physical record in the database.
Lazy Loading requirements
1) The class to be lazy loaded cannot be a sealed
class
2) The class
must have a protected or public constructor without parameter
3) All public
members of the class must be virtual, includes the method
NH Features and Add on
- NH Validator
- NH Spatial
- Components (complex-types)
- Fluent NHibernate & HBM XML: generate hbm xml mapping files or Fluent NHibernate code.
- All NHibernate options (bytecode generator etc.)