Nhibernate <component> tag - mapping multiple entity classes' fields with one table's columns
In short, mapping the properties of multiple entity classes to columns in one table.
Refer to http://ayende.com/blog/3937/nhibernate-mapping-component
<component/> is an interesting feature of NHibernate, which map more or less directly into the notion of a Value Type in DDD. This is a way to create an object model with higher granularity than the physical data model.
And this object model:
They are quite different, where the physical data model put all the data in a single table, we want to treat them in our object model as two separate classes. This is where <component/> comes into play:
<class name="Person" table="People"> <id name="Id"> <generator class="identity"/> </id> <property name="Name" /> <component name="Address"> <property name="Line1"/> <property name="Line2"/> <property name="City"/> <property name="Country"/> <property name="ZipCode"/> </component> </class>
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