EF core 中的两个一对一关系

Question

我正在尝试为具有以下类的实体配置两次一对一关系。

public class Team 
{
    ...
    public virtual TeamGraphic TeamLogo { get; set; }
    public virtual TeamGraphic TeamPlayer { get; set; }
}
public class TeamGraphic
{
    ...
    public virtual Team Team { get; set; }
}

TeamGraphics 将是图像数据。

在数据上下文中 class

modelBuilder.Entity<Team>(t =>
{
    t.HasOne<TeamGraphic>(g => g.TeamLogo)
    .WithOne(t => t.Team);

    t.HasOne<TeamGraphic>(g => g.TeamPlayer)
    .WithOne(t => t.Team);
});

所以用文字来说。 一个团队可以有一个徽标，一个团队可以有一个球员（图片）。

但是当我尝试进行迁移时，出现错误：

Cannot create a relationship between 'TeamGraphic.Team' and 'Team.TeamPlayer' because a 
relationship already exists between 'TeamGraphic.Team' and 'Team.TeamLogo'. Navigations can 
only participate in a single relationship. If you want to override an existing relationship 
call 'Ignore' on the navigation 'Team.TeamPlayer' first in 'OnModelCreating'.

这完全有可能吗？

Answer 1

完整解释错误： “导航只能参与单一关系。” 这意味着您应该在TeamGraphic上创建第二个Team

public class TeamGraphic
{
    ...
    public virtual Team TeamFromTeamLogo { get; set; }
    public virtual Team TeamFromTeamPlayer { get; set; }
}

modelBuilder.Entity<Team>(t =>
{
    t.HasOne<TeamGraphic>(g => g.TeamLogo)
    .WithOne(t => t.TeamFromTeamLogo);

    t.HasOne<TeamGraphic>(g => g.TeamPlayer)
    .WithOne(t => t.TeamFromTeamPlayer);
});

它有道理。 如果您只有一个反向导航， TeamGraphic.Team是不明确的。 “哪一个”？