c# - 使用 Fluent NHibernate 映射大字符串

Question

我正在使用 Oracle 数据库，并且正在尝试映射此类:

public class Book
{
    public virtual int Id { get; private set; }
    public virtual string Author { get; set; }
    public virtual string Title { get; set; }
    public virtual string Text { get; set; }
}

有了这个映射类:

public class BookMap : ClassMap<Book>
{
    public BookMap()
    {
        Id(x => x.Id);
        Map(x => x.Author);
        Map(x => x.Title);
        Map(x => x.Text);
    }
}

但它生成的列类型是 NVARCHAR(255)，而 Book.Text 属性的字符数远远超过 255 个。

如何将它映射到可以包含非常大的字符串的类型(例如 CLOB)？

Answer 1

public class BookMap : ClassMap<Book>
{
    public BookMap()
    {
        Id(x => x.Id);
        Map(x => x.Author);
        Map(x => x.Title);
        Map(x => x.Text).CustomSqlType("CLOB");
    }
}

或

public class BookMap : ClassMap<Book>
{
    public BookMap()
    {
        Id(x => x.Id);
        Map(x => x.Author);
        Map(x => x.Title);
        Map(x => x.Text).Length(500);  // nvarchar(500)
    }
}