使用迁移更改约束名称

Question

我在默认的dbo架构中生成了一些Code-First生成的ASP.NET Identity表。我使用modelBuilder.HasDefaultSchema("Intranet");

更改了这些表的架构

然后应用我的SchemaChange迁移来更新数据库：

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");
}

我现在正尝试进行另一次迁移，将主键类型从string更改为int。

public override void Up()
{
    DropForeignKey("Intranet.AspNetUserRoles", "RoleId", "Intranet.AspNetRoles");
    DropForeignKey("Intranet.AspNetUserClaims", "UserId", "Intranet.AspNetUsers");
    DropForeignKey("Intranet.AspNetUserLogins", "UserId", "Intranet.AspNetUsers");
    DropForeignKey("Intranet.AspNetUserRoles", "UserId", "Intranet.AspNetUsers");
    DropIndex("Intranet.AspNetUserRoles", new[] { "UserId" });
    DropIndex("Intranet.AspNetUserRoles", new[] { "RoleId" });
    DropIndex("Intranet.AspNetUserClaims", new[] { "UserId" });
    DropIndex("Intranet.AspNetUserLogins", new[] { "UserId" });
    DropPrimaryKey("Intranet.AspNetRoles");
    DropPrimaryKey("Intranet.AspNetUserRoles");
    DropPrimaryKey("Intranet.AspNetUsers");
    DropPrimaryKey("Intranet.AspNetUserLogins");
    AlterColumn("Intranet.AspNetRoles", "Id", c => c.Int(nullable: false, identity: true));
    AlterColumn("Intranet.AspNetUserRoles", "UserId", c => c.Int(nullable: false));
    AlterColumn("Intranet.AspNetUserRoles", "RoleId", c => c.Int(nullable: false));
    AlterColumn("Intranet.AspNetUsers", "Id", c => c.Int(nullable: false, identity: true));
    AlterColumn("Intranet.AspNetUserClaims", "UserId", c => c.Int(nullable: false));
    AlterColumn("Intranet.AspNetUserLogins", "UserId", c => c.Int(nullable: false));
    AddPrimaryKey("Intranet.AspNetRoles", "Id");
    AddPrimaryKey("Intranet.AspNetUserRoles", new[] { "UserId", "RoleId" });
    AddPrimaryKey("Intranet.AspNetUsers", "Id");
    AddPrimaryKey("Intranet.AspNetUserLogins", new[] { "LoginProvider", "ProviderKey", "UserId" });
    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);
    DropColumn("Intranet.AspNetRoles", "Discriminator");
}

我的问题是架构更改迁移没有更改所有表上约束的名称。所以现在我有一些标题为：PK_dbo.AspNetRoles而不是PK_Intranet.AspNetRoles的约束，当迁移尝试删除这些主键时，它会失败，因为它试图删除不存在的约束

ALTER TABLE [Intranet].[AspNetRoles] DROP CONSTRAINT [PK_Intranet.AspNetRoles]
System.Data.SqlClient.SqlException (0x80131904): 'PK_Intranet.AspNetRoles' is not a constraint.
...
'PK_Intranet.AspNetRoles' is not a constraint.
Could not drop constraint. See previous errors.

我想知道使用迁移更改这些约束的所有名称的最佳方法是什么。这样，如果我们需要回滚到dbo，无论出于何种原因，我们都可以回滚迁移。

Answer 1

我最终查看了在-Verbose语句末尾使用Update-Database -TargetMigration MigrationName关键字执行的SQL语句来解决此问题。

我从每个表中删除了所有外键和主键，然后使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语句：

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);

“Intranet”是你的新模式名称，“dbo”是旧的模式名称，“Id”是列名，“AspNetUserRoles”是带有外键的表，而“AspNetRoles”是你的表。主键（您首先尝试更改的那个）。

要处理Down()迁移方法，只需反转模式名称。

以下是我的新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);
}