Question

我正在将我的应用程序从本地迁移到Azure并遇到以下错误：

支持'ApplicationDbContext'上下文的模型已经改变了数据库已创建。

我的数据库包含ASP.net标识字段和我添加的其他一些表：

初始迁移：

namespace WebApplication12.Migrations
{
    using System;
    using System.Data.Entity.Migrations;

    public partial class init : DbMigration
    {
        public override void Up()
        {
            CreateTable(
                "dbo.AspNetRoles",
                c => new
                    {
                        Id = c.String(nullable: false, maxLength: 128),
                        Name = c.String(nullable: false, maxLength: 256),
                    })
                .PrimaryKey(t => t.Id)
                .Index(t => t.Name, unique: true, name: "RoleNameIndex");

            CreateTable(
                "dbo.AspNetUserRoles",
                c => new
                    {
                        UserId = c.String(nullable: false, maxLength: 128),
                        RoleId = c.String(nullable: false, maxLength: 128),
                    })
                .PrimaryKey(t => new { t.UserId, t.RoleId })
                .ForeignKey("dbo.AspNetRoles", t => t.RoleId, cascadeDelete: true)
                .ForeignKey("dbo.AspNetUsers", t => t.UserId, cascadeDelete: true)
                .Index(t => t.UserId)
                .Index(t => t.RoleId);

            CreateTable(
                "dbo.AspNetUsers",
                c => new
                    {
                        Id = c.String(nullable: false, maxLength: 128),
                        Email = c.String(maxLength: 256),
                        EmailConfirmed = c.Boolean(nullable: false),
                        PasswordHash = c.String(),
                        SecurityStamp = c.String(),
                        PhoneNumber = c.String(),
                        PhoneNumberConfirmed = c.Boolean(nullable: false),
                        TwoFactorEnabled = c.Boolean(nullable: false),
                        LockoutEndDateUtc = c.DateTime(),
                        LockoutEnabled = c.Boolean(nullable: false),
                        AccessFailedCount = c.Int(nullable: false),
                        UserName = c.String(nullable: false, maxLength: 256),
                    })
                .PrimaryKey(t => t.Id)
                .Index(t => t.UserName, unique: true, name: "UserNameIndex");

            CreateTable(
                "dbo.AspNetUserClaims",
                c => new
                    {
                        Id = c.Int(nullable: false, identity: true),
                        UserId = c.String(nullable: false, maxLength: 128),
                        ClaimType = c.String(),
                        ClaimValue = c.String(),
                    })
                .PrimaryKey(t => t.Id)
                .ForeignKey("dbo.AspNetUsers", t => t.UserId, cascadeDelete: true)
                .Index(t => t.UserId);

            CreateTable(
                "dbo.AspNetUserLogins",
                c => new
                    {
                        LoginProvider = c.String(nullable: false, maxLength: 128),
                        ProviderKey = c.String(nullable: false, maxLength: 128),
                        UserId = c.String(nullable: false, maxLength: 128),
                    })
                .PrimaryKey(t => new { t.LoginProvider, t.ProviderKey, t.UserId })
                .ForeignKey("dbo.AspNetUsers", t => t.UserId, cascadeDelete: true)
                .Index(t => t.UserId);

        }

        public override void Down()
        {
            DropForeignKey("dbo.AspNetUserRoles", "UserId", "dbo.AspNetUsers");
            DropForeignKey("dbo.AspNetUserLogins", "UserId", "dbo.AspNetUsers");
            DropForeignKey("dbo.AspNetUserClaims", "UserId", "dbo.AspNetUsers");
            DropForeignKey("dbo.AspNetUserRoles", "RoleId", "dbo.AspNetRoles");
            DropIndex("dbo.AspNetUserLogins", new[] { "UserId" });
            DropIndex("dbo.AspNetUserClaims", new[] { "UserId" });
            DropIndex("dbo.AspNetUsers", "UserNameIndex");
            DropIndex("dbo.AspNetUserRoles", new[] { "RoleId" });
            DropIndex("dbo.AspNetUserRoles", new[] { "UserId" });
            DropIndex("dbo.AspNetRoles", "RoleNameIndex");
            DropTable("dbo.AspNetUserLogins");
            DropTable("dbo.AspNetUserClaims");
            DropTable("dbo.AspNetUsers");
            DropTable("dbo.AspNetUserRoles");
            DropTable("dbo.AspNetRoles");
        }
    }
}

最新迁移：

namespace WebApplication12.Migrations
{
    using System;
    using System.Data.Entity.Migrations;

    public partial class paymentsmodel : DbMigration
    {
        public override void Up()
        {
        }

        public override void Down()
        {
        }
    }
}

我在StackOverflow中对此进行了研究，但仍然完全迷失了。当我查看迁移时，最初的迁移包括所有ASP.net标识表，但没有添加任何其他表。当我运行另一次迁移时，它是空的。

Answer 1

但是我添加的附加表都没有。当我进行另一次迁移时，它是空的。

确保您不更改表格中的任何模型。如果您有更改模型，则需要使用add-migration命令和update-database到update。

然后点击＆＃34; 执行代码优先迁移（在应用程序启动时运行）＆＃34;在您发布网站时的设置中，可以将更改更新为azure。

此外，您可以从本地的SQL Server对象资源管理器中删除 _MigrationHistory表中创建的记录。

在 Global.asax 中的Application_Start()中添加以下行：

Database.SetInitializer<Models.YourDbContext>(null);

将Web App和DB发布到Azure - 自创建数据库以来，支持“ApplicationDbContext”上下文的模型已更改

1 个答案: