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问题描述

我试图插入一些很长的文本到一个字符串prop - 它与LinqToSql完美的工作,现在我已经切换到NHibernate,并希望保存相同的实体,但nHibernate引发上述异常。



我如何解决这个问题?

原本我的道具被定义为:

  Map(x => x.Content,fT_Content)。Nullable(); 
Map(x => x.Fields,fT_Fields)。Nullable();

现在他们是:这个工作,但为什么我必须这样做

  Map(x => x.Content,fT_Content)。CustomSqlType(nvarchar(max))长度(Int32.MaxValue).Nullable(); 
Map(x => x.Fields,fT_Fields)。CustomSqlType(nvarchar(max))。Length(Int32.MaxValue).Nullable();

注意:我有最新的nhibernate使用nuget。



$ p
$ b

  public virtual string Content 
{
get;
set;
}

公共虚拟字符串字段
{
get;
set;
}

我想避免所有突然插入停止工作在这张桌子上....

解决方案这是一个众所周知的问题NHibernate处理nvarchar(最大),请参阅:



几年来,我一直在将nvarchar(max)列映射到StringClob,而不会遇到任何问题:



$ p $ < property name =myPropcolumn =MY_PROPnot-null =truetype =StringClobaccess =property >< /性>

这个链接(来自注释)描述了解决此问题所需的流畅映射:



http:/

  Map(x => x.Description).CustomType(StringClob)。CustomSqlType(nvarchar(max)); 


I am trying to insert some very long text into a string prop - it worked perfectly fine with LinqToSql, now I have switched over to NHibernate and want to save the same entity, but nHibernate throws the above exception.

How can I fix this?

Originally my props were defined as:

        Map(x => x.Content, "fT_Content").Nullable();
        Map(x => x.Fields, "fT_Fields").Nullable();

now they are: this works but why do I have to do this?

        Map(x => x.Content, "fT_Content").CustomSqlType("nvarchar(max)").Length(Int32.MaxValue).Nullable();
        Map(x => x.Fields, "fT_Fields").CustomSqlType("nvarchar(max)").Length(Int32.MaxValue).Nullable();

Note: I have the latest nhibernate using nuget.

For ref here are the fields:

    public virtual string Content
    {
        get;
        set;
    }

    public virtual string Fields
    {
        get;
        set;
    }

I want to avoid going to live production and all of a sudden inserts stop working on this table....

This is a well known issue with NHibernate handling nvarchar(max), see :

http://geekswithblogs.net/lszk/archive/2011/07/11/nhibernatemapping-a-string-field-as-nvarcharmax-in-sql-server-using.aspx

For some years now, I have been file mapping nvarchar(max) columns to StringClob without encountering any problem :

<property name="myProp" column="MY_PROP" not-null="true" type="StringClob" access="property"></property>

This link (from the comments) describes the fluent mapping required to fix this issue:

http://www.tritac.com/bp-21-fluent-nhibernate-nvarcharmax-fields-truncated-to-4000-characters

Map(x => x.Description).CustomType("StringClob").CustomSqlType("nvarchar(max)");

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07-26 05:32