由于约束违规列而中止GroupId，idx不是唯一的

Question

我正在使用FluentNHibernate并进行了多对多映射，但是当我尝试保存我的实体时，我收到以下错误：

NHibernate.Exceptions.GenericADOException: NHibernate.Exceptions.GenericADOException
: could not insert collection: [Test.Entities.Recipient.Groups#b6815d34-f436-4142-9b8e-1bfcbf25509e][SQL: SQL not available]
---- System.Data.SQLite.SQLiteException : Abort due to constraint violation
columns GroupId, idx are not unique

这是我的映射：

public class GroupMap : ClassMap<Group>
{
    public GroupMap()
    {
        Id(x => x.Id).GeneratedBy.Guid();
        Map(x => x.Name);
        Map(x => x.SenderName);
        Map(x => x.Created);
        HasManyToMany(x => x.Recipients)
            .AsList()
            .WithTableName("groups_recipients")
            .WithParentKeyColumn("GroupId")
            .WithChildKeyColumn("RecipientId")
            .LazyLoad()
            .Cascade.AllDeleteOrphan();
    }
}

public class RecipientMap : ClassMap<Recipient>
{
    public RecipientMap()
    {
        Id(x => x.Id).GeneratedBy.Guid();
        Map(x => x.Firstname);
        Map(x => x.Lastname);
        Map(x => x.Phone);
        Map(x => x.Email);
        HasManyToMany(x => x.Groups)
            .AsList()
            .WithTableName("groups_recipients")
            .WithParentKeyColumn("RecipientId")
            .WithChildKeyColumn("GroupId")
            .LazyLoad().Cascade.None();
    }
}

问题似乎与关系表id有关，但我无法弄清楚如何解决它。

干杯， nandarya

Answer 1

使用AsList（）不是一个好主意。应该是AsBag（）。一切似乎都有效。