HBM mapping both field and property

I have the following class:

public class Foo 
{
    //...
    protected int? someData;
    public int? SomeData
    {
        get {return someData;}
        set {someData = value;}
    }
    //...
}

This class is mapped in HBM file:

<class name="Foo" table="Foo">
//....
    <property name="someData" access="field" column="SOME_DATA" />
//....
</class>

For legacy reasons, the columns were mapped to a fields (lowercase), which are unaccessible (not public properties - uppercase).

These lowercase mappings are using multiple times in the project as part of HQL strings, criteria-based queries and so on. It is close to impossible to find all usages.

The problem is that such usage makes it impossible to use even on simple lambda:

session.Query<Foo>().Select(f=>f.SomeData)

throws error, as uppercase "SomeData" is not mapped, and

session.Query<Foo>().Select(f=>f.someData)

does not compile, as lowercase "someData" is protected.

What happens, if I will map BOTH field and property:

<property name="someData" access="field" column="SOME_DATA" />
<property name="SomeData" access="property" column="SOME_DATA" />

I tried quickly, and it seems to work, but will it have any drawback?

Is there any other simple solution, that will not require editing every criteria-based query in project?

Thanks for any help.

You can map the same column multiple times but with recent NHibernate versions only one of the properties need to be mapped as modifiable. So just add insert="false" update="false" to your additional mappings to avoid any issues in future:

<property name="someData" access="field" column="SOME_DATA" />
<property name="SomeData" access="property" column="SOME_DATA" update="false" insert="false" />