ServiceStack OrmLite - 数据库优先和多个主键

Question

我必须处理现有的 Db 并且想使用 ServiceStack 的 OrmLite。

因此我使用 OrmLite T4 模板创建了 Poco 类。

问题：我想保存到具有多个主键的 table。

 public partial class DbUserGroup
{
    [Required]
    public int Userid { get; set;} // this is a primary key
    [Required]
    public int Groupid { get; set;} // this is a primary key

    public int Ranking { get; set;}
    public bool Isprimary { get; set;}
}

目前无法使用 Db.Save(userGroup)。有什么方法可以使用 ServiceStack 的 OrmLite 解决这个问题。

Answer 1

我通过将 [PrimaryKey] 添加到两个属性来解决它。

public partial class DbUserGroup
{
    [Required]
    [PrimaryKey]
    public int Userid { get; set;} // this is a primary key

    [Required]
    [PrimaryKey]
     public int Groupid { get; set;} // this is a primary key

    public int Ranking { get; set;}
    public bool Isprimary { get; set;}
}

Answer 2

多个主键不存在。 A multi-column 主键是的。请看看这个linkhttps://github.com/ServiceStack/ServiceStack.OrmLite#limitations

如其所说

A potential workaround to support tables with multiple primary keys is to create an auto generated Id property that returns a unique value based on all the primary key fields

ServiceStack OrmLite - 数据库优先和多个主键

ServiceStack OrmLite - database first & multiple primary keys

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