我正在使用 EF Core 2.0 并创建了与联接实体的多对多关系。当我添加新的迁移 EF 时,总是会创建一个额外的索引/Id 字段,这是完全愚蠢的。这是我的加入实体:
public class Team_Member
{
public int TeamId { get; set; }
public Team Team { get; set; }
public int MemberId { get; set; }
public Member Member { get; set; }
public MemberTypeEnum MemberType { get; set; }
}
这是连接表的配置(以下是互联网上的几个示例):
public class Team_MemberConfig : IEntityTypeConfiguration<Team_Member>
{
public void Configure(EntityTypeBuilder<Team_Member> builder)
{
builder.ToTable("Team_Member");
builder.HasKey(tm => new { tm.TeamId, tm.MemberId });
builder.HasOne<Team>()
.WithMany(t => t.Team_Member)
.HasForeignKey(tm => tm.TeamId)
.OnDelete(DeleteBehavior.Restrict);
builder.HasOne<Member>()
.WithMany(m => m.Team_Member)
.HasForeignKey(tm => tm.MemberId)
.OnDelete(DeleteBehavior.Restrict);
}
}
对于每个外键列迁移添加第二个:
columns: table => new
{
TeamId = table.Column<int>(nullable: false),
MemberId = table.Column<int>(nullable: false),
**MemberId1** = table.Column<int>(nullable: true),
MemberType = table.Column<int>(nullable: false),
**TeamId1** = table.Column<int>(nullable: true)
},
和两个完全相同的约束:
table.ForeignKey(
name: "FK_Team_Member_Member_MemberId",
column: x => x.MemberId,
principalTable: "Member",
principalColumn: "Id",
onDelete: ReferentialAction.Restrict);
table.ForeignKey(
name: "FK_Team_Member_Member_MemberId1",
column: x => x.MemberId1,
principalTable: "Member",
principalColumn: "Id",
onDelete: ReferentialAction.Restrict);
table.ForeignKey(
name: "FK_Team_Member_Team_TeamId",
column: x => x.TeamId,
principalTable: "Team",
principalColumn: "Id",
onDelete: ReferentialAction.Restrict);
table.ForeignKey(
name: "FK_Team_Member_Team_TeamId1",
column: x => x.TeamId1,
principalTable: "Team",
principalColumn: "Id",
onDelete: ReferentialAction.Restrict);
我在这里做错了什么?