Override FluentNHibernate Auto mapping - fluent

Question

I need change for the next class data type assumed by default FluentNHibernate Automapping
public class plaparte
{
public virtual int id { get; private set; }
public virtual int vivos { get; set; }
public virtual int lesionados { get; set; }
public virtual int quemados { get; set; }
public virtual int muertos { get; set; }
public virtual int otros { get; set; }
public virtual string colaboracion { get; set; }
public virtual decimal hectareas { get; set; }
public virtual string reconocimiento { get; set; }
public virtual string disposiciones { get; set; }
public virtual plaserv plaserv { get; set; }
}
}
I need for this class only the string type to be converted into TEXT in database
If I change by
public virtual string[] reconocimiento { get; set; }
FluentNHibernate takes a BLOB data type
I can do something like?
public class plaparteMappingOverride : IAutoMappingOverride<plaparte>
{
public void Override(AutoMapping<plaparte> mapping)
{
Map(x => x.disposiciones).CustomSqlTypeIs("TEXT");
}
}

Answer 1

To solve the problem I am using:
using System.ComponentModel.DataAnnotations;
...
public class plaparte
{
...
[StringLength(4000)]
public virtual string disposiciones { get; set; }
To create TEXT fields
[Update]
For work I need to create the next class
class StringLengthConvention : AttributePropertyConvention<StringLengthAttribute>
{
protected override void Apply(StringLengthAttribute attribute, IPropertyInstance instance)
{
instance.Length(attribute.MaximumLength);
}
}
is also necessary to add the convention Fluent automap
Like
static AutoPersistenceModel CreateAutomappings()
{
return AutoMap.AssemblyOf<plaparte>(new mapAutomapConfiguration())
.Conventions.Setup(c =>
{
c.Add<StringLengthConvention>();
});
}