我最终查看了在我的 Update-Database -TargetMigration MigrationName 语句末尾使用 -Verbose 关键字执行的 SQL 语句来解决这个问题。
我从每个表中删除了所有外键和主键，然后用正确的名称将它们添加回来。
entity-framework 试图这样做的地方：
DropForeignKey("Intranet.AspNetUserRoles", "RoleId", "Intranet.AspNetRoles");
DropIndex("Intranet.AspNetUserRoles", new[] { "UserId" });
DropPrimaryKey("Intranet.AspNetRoles");
翻译成这些SQL 声明：
IF object_id(N'[Intranet].[FK_Intranet.AspNetUserRoles_Intranet.AspNetRoles_RoleId]', N'F') IS NOT NULL
ALTER TABLE [Intranet].[AspNetUserRoles] DROP CONSTRAINT [FK_Intranet.AspNetUserRoles_Intranet.AspNetRoles_RoleId]
IF EXISTS (SELECT name FROM sys.indexes WHERE name = N'IX_UserId' AND object_id = object_id(N'[Intranet].[AspNetUserRoles]', N'U'))
DROP INDEX [IX_UserId] ON [Intranet].[AspNetUserRoles]
ALTER TABLE [Intranet].[AspNetRoles] DROP CONSTRAINT [PK_Intranet.AspNetRoles]
我这样做了：
IF object_id(N'[Intranet].[FK_dbo.AspNetUserRoles_dbo.AspNetRoles_RoleId]', N'F') IS NOT NULL
ALTER TABLE[Intranet].[AspNetUserRoles] DROP CONSTRAINT[FK_dbo.AspNetUserRoles_dbo.AspNetRoles_RoleId]
IF EXISTS (SELECT name FROM sys.indexes WHERE name = N'IX_UserId' AND object_id = object_id(N'[Intranet].[AspNetUserRoles]', N'U'))
DROP INDEX[IX_UserId] ON[Intranet].[AspNetUserRoles]
ALTER TABLE[Intranet].[AspNetRoles] DROP CONSTRAINT[PK_dbo.AspNetRoles]
因此，要更改单个约束名称，您最终会在迁移中使用此名称：
Sql("IF object_id(N'[Intranet].[FK_dbo.AspNetUserRoles_dbo.AspNetRoles_RoleId]', N'F') IS NOT NULL \r\n" +
"ALTER TABLE[Intranet].[AspNetUserRoles] DROP CONSTRAINT[FK_dbo.AspNetUserRoles_dbo.AspNetRoles_RoleId]\r\n" +
"IF EXISTS (SELECT name FROM sys.indexes WHERE name = N'IX_UserId' AND object_id = object_id(N'[Intranet].[AspNetUserRoles]', N'U')) \r\n" +
"DROP INDEX[IX_UserId] ON[Intranet].[AspNetUserRoles] \r\n" +
"ALTER TABLE[Intranet].[AspNetRoles] DROP CONSTRAINT[PK_dbo.AspNetRoles]");
AddPrimaryKey("Intranet.AspNetUserRoles", "Id");
CreateIndex("Intranet.AspNetUserRoles", "UserId");
AddForeignKey("Intranet.AspNetUserRoles", "RoleId", "Intranet.AspNetRoles", "Id", cascadeDelete: true);
其中“Intranet”是您的新架构名称，“dbo”是旧架构名称，“Id”是列名，“AspNetUserRoles”是带有外键的表，“AspNetRoles”是带有主键（您最初尝试更改的主键）。
要处理 Down() 迁移方法，只需反转架构名称即可。
这是我的新 SchemaChange 迁移：
public override void Up()
{
MoveTable(name: "dbo.AspNetRoles", newSchema: "Intranet");
MoveTable(name: "dbo.AspNetUserRoles", newSchema: "Intranet");
MoveTable(name: "dbo.AspNetUsers", newSchema: "Intranet");
MoveTable(name: "dbo.AspNetUserClaims", newSchema: "Intranet");
MoveTable(name: "dbo.AspNetUserLogins", newSchema: "Intranet");
Sql("IF object_id(N'[Intranet].[FK_dbo.AspNetUserRoles_dbo.AspNetRoles_RoleId]', N'F') IS NOT NULL \r\n" +
"ALTER TABLE[Intranet].[AspNetUserRoles] DROP CONSTRAINT[FK_dbo.AspNetUserRoles_dbo.AspNetRoles_RoleId]\r\n" +
"IF object_id(N'[Intranet].[FK_dbo.AspNetUserClaims_dbo.AspNetUsers_UserId]', N'F') IS NOT NULL \r\n" +
"ALTER TABLE[Intranet].[AspNetUserClaims] DROP CONSTRAINT[FK_dbo.AspNetUserClaims_dbo.AspNetUsers_UserId] \r\n" +
"IF object_id(N'[Intranet].[FK_dbo.AspNetUserLogins_dbo.AspNetUsers_UserId]', N'F') IS NOT NULL \r\n" +
"ALTER TABLE[Intranet].[AspNetUserLogins] DROP CONSTRAINT[FK_dbo.AspNetUserLogins_dbo.AspNetUsers_UserId] \r\n" +
"IF object_id(N'[Intranet].[FK_dbo.AspNetUserRoles_dbo.AspNetUsers_UserId]', N'F') IS NOT NULL \r\n" +
"ALTER TABLE[Intranet].[AspNetUserRoles] DROP CONSTRAINT[FK_dbo.AspNetUserRoles_dbo.AspNetUsers_UserId] \r\n" +
"IF EXISTS (SELECT name FROM sys.indexes WHERE name = N'IX_UserId' AND object_id = object_id(N'[Intranet].[AspNetUserRoles]', N'U')) \r\n" +
"DROP INDEX[IX_UserId] ON[Intranet].[AspNetUserRoles] \r\n" +
"IF EXISTS (SELECT name FROM sys.indexes WHERE name = N'IX_RoleId' AND object_id = object_id(N'[Intranet].[AspNetUserRoles]', N'U')) \r\n" +
"DROP INDEX[IX_RoleId] ON[Intranet].[AspNetUserRoles] \r\n" +
"IF EXISTS (SELECT name FROM sys.indexes WHERE name = N'IX_UserId' AND object_id = object_id(N'[Intranet].[AspNetUserClaims]', N'U')) \r\n" +
"DROP INDEX[IX_UserId] ON[Intranet].[AspNetUserClaims] \r\n" +
"IF EXISTS (SELECT name FROM sys.indexes WHERE name = N'IX_UserId' AND object_id = object_id(N'[Intranet].[AspNetUserLogins]', N'U')) \r\n" +
"DROP INDEX[IX_UserId] ON[Intranet].[AspNetUserLogins]\r\n" +
"ALTER TABLE[Intranet].[AspNetRoles] DROP CONSTRAINT[PK_dbo.AspNetRoles]\r\n" +
"ALTER TABLE[Intranet].[AspNetUserRoles] DROP CONSTRAINT[PK_dbo.AspNetUserRoles]\r\n" +
"ALTER TABLE[Intranet].[AspNetUsers] DROP CONSTRAINT[PK_dbo.AspNetUsers]\r\n" +
"ALTER TABLE[Intranet].[AspNetUserLogins] DROP CONSTRAINT[PK_dbo.AspNetUserLogins]\r\n" +
"ALTER TABLE[Intranet].[AspNetUserClaims] DROP CONSTRAINT[PK_dbo.AspNetUserClaims]");
AddPrimaryKey("Intranet.AspNetRoles", "Id");
AddPrimaryKey("Intranet.AspNetUserRoles", new[] { "UserId", "RoleId" });
AddPrimaryKey("Intranet.AspNetUsers", "Id");
AddPrimaryKey("Intranet.AspNetUserLogins", new[] { "LoginProvider", "ProviderKey", "UserId" });
AddPrimaryKey("Intranet.AspNetUserClaims", "Id");
CreateIndex("Intranet.AspNetUserRoles", "UserId");
CreateIndex("Intranet.AspNetUserRoles", "RoleId");
CreateIndex("Intranet.AspNetUserClaims", "UserId");
CreateIndex("Intranet.AspNetUserLogins", "UserId");
AddForeignKey("Intranet.AspNetUserRoles", "RoleId", "Intranet.AspNetRoles", "Id", cascadeDelete: true);
AddForeignKey("Intranet.AspNetUserClaims", "UserId", "Intranet.AspNetUsers", "Id", cascadeDelete: true);
AddForeignKey("Intranet.AspNetUserLogins", "UserId", "Intranet.AspNetUsers", "Id", cascadeDelete: true);
AddForeignKey("Intranet.AspNetUserRoles", "UserId", "Intranet.AspNetUsers", "Id", cascadeDelete: true);
}
public override void Down()
{
MoveTable(name: "Intranet.AspNetUserLogins", newSchema: "dbo");
MoveTable(name: "Intranet.AspNetUserClaims", newSchema: "dbo");
MoveTable(name: "Intranet.AspNetUsers", newSchema: "dbo");
MoveTable(name: "Intranet.AspNetUserRoles", newSchema: "dbo");
MoveTable(name: "Intranet.AspNetRoles", newSchema: "dbo");
Sql("IF object_id(N'[dbo].[FK_Intranet.AspNetUserRoles_Intranet.AspNetRoles_RoleId]', N'F') IS NOT NULL \r\n" +
"ALTER TABLE[dbo].[AspNetUserRoles] DROP CONSTRAINT[FK_Intranet.AspNetUserRoles_Intranet.AspNetRoles_RoleId]\r\n" +
"IF object_id(N'[dbo].[FK_Intranet.AspNetUserClaims_Intranet.AspNetUsers_UserId]', N'F') IS NOT NULL \r\n" +
"ALTER TABLE[dbo].[AspNetUserClaims] DROP CONSTRAINT[FK_Intranet.AspNetUserClaims_Intranet.AspNetUsers_UserId] \r\n" +
"IF object_id(N'[dbo].[FK_Intranet.AspNetUserLogins_Intranet.AspNetUsers_UserId]', N'F') IS NOT NULL \r\n" +
"ALTER TABLE[dbo].[AspNetUserLogins] DROP CONSTRAINT[FK_Intranet.AspNetUserLogins_Intranet.AspNetUsers_UserId] \r\n" +
"IF object_id(N'[dbo].[FK_Intranet.AspNetUserRoles_Intranet.AspNetUsers_UserId]', N'F') IS NOT NULL \r\n" +
"ALTER TABLE[dbo].[AspNetUserRoles] DROP CONSTRAINT[FK_Intranet.AspNetUserRoles_Intranet.AspNetUsers_UserId] \r\n" +
"IF EXISTS (SELECT name FROM sys.indexes WHERE name = N'IX_UserId' AND object_id = object_id(N'[dbo].[AspNetUserRoles]', N'U')) \r\n" +
"DROP INDEX[IX_UserId] ON[dbo].[AspNetUserRoles] \r\n" +
"IF EXISTS (SELECT name FROM sys.indexes WHERE name = N'IX_RoleId' AND object_id = object_id(N'[dbo].[AspNetUserRoles]', N'U')) \r\n" +
"DROP INDEX[IX_RoleId] ON[dbo].[AspNetUserRoles] \r\n" +
"IF EXISTS (SELECT name FROM sys.indexes WHERE name = N'IX_UserId' AND object_id = object_id(N'[dbo].[AspNetUserClaims]', N'U')) \r\n" +
"DROP INDEX[IX_UserId] ON[dbo].[AspNetUserClaims] \r\n" +
"IF EXISTS (SELECT name FROM sys.indexes WHERE name = N'IX_UserId' AND object_id = object_id(N'[dbo].[AspNetUserLogins]', N'U')) \r\n" +
"DROP INDEX[IX_UserId] ON[dbo].[AspNetUserLogins]\r\n" +
"ALTER TABLE[dbo].[AspNetRoles] DROP CONSTRAINT[PK_Intranet.AspNetRoles]\r\n" +
"ALTER TABLE[dbo].[AspNetUserRoles] DROP CONSTRAINT[PK_Intranet.AspNetUserRoles]\r\n" +
"ALTER TABLE[dbo].[AspNetUsers] DROP CONSTRAINT[PK_Intranet.AspNetUsers]\r\n" +
"ALTER TABLE[dbo].[AspNetUserLogins] DROP CONSTRAINT[PK_Intranet.AspNetUserLogins]\r\n" +
"ALTER TABLE[dbo].[AspNetUserClaims] DROP CONSTRAINT[PK_Intranet.AspNetUserClaims]");
AddPrimaryKey("dbo.AspNetRoles", "Id");
AddPrimaryKey("dbo.AspNetUserRoles", new[] { "UserId", "RoleId" });
AddPrimaryKey("dbo.AspNetUsers", "Id");
AddPrimaryKey("dbo.AspNetUserLogins", new[] { "LoginProvider", "ProviderKey", "UserId" });
AddPrimaryKey("dbo.AspNetUserClaims", "Id");
CreateIndex("dbo.AspNetUserRoles", "UserId");
CreateIndex("dbo.AspNetUserRoles", "RoleId");
CreateIndex("dbo.AspNetUserClaims", "UserId");
CreateIndex("dbo.AspNetUserLogins", "UserId");
AddForeignKey("dbo.AspNetUserRoles", "RoleId", "dbo.AspNetRoles", "Id", cascadeDelete: true);
AddForeignKey("dbo.AspNetUserClaims", "UserId", "dbo.AspNetUsers", "Id", cascadeDelete: true);
AddForeignKey("dbo.AspNetUserLogins", "UserId", "dbo.AspNetUsers", "Id", cascadeDelete: true);
AddForeignKey("dbo.AspNetUserRoles", "UserId", "dbo.AspNetUsers", "Id", cascadeDelete: true);
}