流利的Nhibernate枚举映射

Question

我enum在流畅的NHibernate中映射时遇到了一些问题.我知道这个问题已被多次询问,但我找不到任何对我有用的解决方案.我是NHibernate的新手,看起来我可能错过了一些简单而愚蠢的东西.这是我的代码.

public class DBPublication
{
    public virtual int pub_id { get; set; }
    public virtual PublicationStatuses status { get; set; }
    ...
}

public enum PublicationStatuses 
{
    on_moderation,
    active,
    ...
}


public class DBPublicationMap : ClassMap<DBPublication>
{
    public DBPublicationMap()
    {
        Table("content.publications");
        Id(x => x.pub_id).GeneratedBy.Sequence("content.pub_sq");           
        Map(x => x.status);
        ...
    }
}

postgres枚举类型

CREATE TYPE content.enum_publication_status AS ENUM('on_moderation', 'active', ...);

但是当我试图保存时,postgres会抛出这个

column "status" is of type content.enum_publication_status but expression is of type text

有什么建议吗？

Answer 1

以下是配置nhibernate以存储枚举字段的工作示例.

public class Entity
{
    public virtual int id { get; set; }

    public virtual SomeEnum EnumField { get; set; }
}

public enum SomeEnum
{
    Value1,
    Value2
}

class EntityMap : ClassMap<Entity>
{
    public EntityMap()
    {
        Id(x => x.id).GeneratedBy.Native();
        Map(x => x.EnumField);
    }
}

class Program
{
    static void Main(string[] args)
    {
        var factory = Fluently.Configure().Mappings(x => x.FluentMappings.AddFromAssemblyOf<Entity>())
                                .ExposeConfiguration(config => new SchemaExport(config).Create(false, true))
                                .Database(MsSqlConfiguration.MsSql2008.ConnectionString("Data Source=.;Initial Catalog=nhtest;Integrated Security=True"))
                                .BuildSessionFactory();
        using (var session = factory.OpenSession())
        {
            using (var transaction = session.BeginTransaction())
            {
                var entity = new Entity();
                entity.EnumField = SomeEnum.Value2;
                session.Save(entity);
                transaction.Commit();
            }
        }

    }
}

在这种情况下,它作为字符串存储在数据库中.如果要将其保存为整数,则需要将Enum字段属性的映射更改为以下内容:

Map(x => x.EnumField).CustomType<int>();