帮助在Castle Active Record中配置关联表以防关联表答案

【问题标题】：Help Configuring Associations in Castle Active Record in case of association table帮助在Castle Active Record中配置关联表以防关联表
【发布时间】：2011-08-26 15:57:52
【问题描述】：

我有类似的桌子

用户（UserId、用户名、密码、CreatedOn、CreatedBy）

角色（RoleId、RoleName、Description、CreatedOn、CreatedBy）

UserRoleMap(UserRoleMapId,UserId,RoleId,CreatedOn,CreatedBy)

这些是我的实体：

[ActiveRecord(Table="Users")]
public class User:ActiveRecordBase<User>
{
    [PrimaryKey(Generator = PrimaryKeyType.Identity, Column = "RoleId")]
    public virtual int UserId { get; set; }

    [Property(Column="Username")]
    public virtual string Username { get; set; }

    [Property(Column = "Password")]
    public virtual string  Password { get; set; }

    [Property(Column="CreatedBy")]
    public virtual string CreatedBy { get; set; }

    [Property(Column="CreatedOn")]
    public virtual DateTime CreatedOn { get; set; }

    [HasAndBelongsToMany(Table="UserRoleMap",ColumnKey="UserId")]
    public IList<Role> Roles { get; set; }

}
[ActiveRecord(Table = "Roles")]
public class Role : ActiveRecordBase<User>
{
    [PrimaryKey(Generator = PrimaryKeyType.Identity, Column = "RoleId")]
    public virtual int RoleId { get; set; }

    [Property(Column = "RoleName")]
    public virtual string RoleName { get; set; }

    [Property(Column = "Description")]
    public virtual string Description { get; set; }

    [Property(Column = "CreatedBy")]
    public virtual string CreatedBy { get; set; }

    [Property(Column = "CreatedOn")]
    public virtual DateTime CreatedOn { get; set; }

    [HasAndBelongsToMany(Table = "UserRoleMap", ColumnKey = "RoleId")]
    public IList<User> Users { get; set; }
}

[ActiveRecord(Table="UserRoleMap")]
public class UserRoleMap:ActiveRecordBase<UserRoleMap>
{
    [PrimaryKey(Generator = PrimaryKeyType.Identity, Column = "UserRoleMapId")]
    public virtual int UserRoleMapId { get; set; }

    [BelongsTo(Column="UserId",Table="Users")]
    public virtual User UserId { get; set; }

    [BelongsTo(Column = "RoleId", Table = "Roles")]
    public virtual Role RoleId { get; set; }

}

我不断收到此错误： ActiveRecordSample.Tests.FrameworkInitializationTest.CanInitializaFramework : Castle.ActiveRecord.Framework.ActiveRecordException : 属性 UserId 引用表“Users”，该表在类上没有对应的 [JoinedTable]。

【问题讨论】：

标签： many-to-many castle-activerecord xunit.net

【解决方案1】：

只要列名与属性名匹配，就不需要设置 Column="..."
User.UserId 映射到“RoleId”列，应该是“UserId”（或者我上面说的，不要定义）
请务必了解pros and cons of each PK generator。
使用 HasAndBelongsToMany 时，您不需要单独的关系类（在您的情况下为 UserRoleMap）。
IIRC 您还需要使用 ColumnRef 在 HasAndBelongsToMany 中定义其他 FK。

【讨论】：