没有应用迁移。该数据库已经是最新的。完成

Question

我有一些模型：

我已经运行了添加迁移命令

dotnet ef migrations add <migration name>

现在我设置了以下迁移：

当我启动dotnet ef database update时，我看到我的表是SQL客户端，并且一切正常。

当我连接到另一个数据库时，问题开始了。我想将迁移应用到新数据库。但是，当我运行dotnet ef database update时，会看到No migrations were applied. The database is already up to date. Done.消息。该命令仅创建__EFMigrationsHistory表，并且该表为空。如何在新数据库上使用迁移？

这是我的ApplicationContext

public class ApplicationContext : DbContext
{
    private readonly string _connectionString;

    public ApplicationContext(IConfiguration configuration)
    {
        _connectionString = configuration.GetConnectionString("Recipes");
    }

    public DbSet<User> Users { get; set; }
    public DbSet<Recipe> Recipes { get; set; }
    public DbSet<RecipeStep> RecipeSteps { get; set; }
    public DbSet<Ingredient> Ingridients { get; set; }
    public DbSet<Category> Categories { get; set; }
    public DbSet<Advertising> Advertisings { get; set; }
    public DbSet<FileModel> Files { get; set; }
    public DbSet<RecipeLike> RecipeLikes { get; set; }
    public DbSet<RecipeDislike> RecipeDislikes { get; set; }
    public DbSet<Bookmark> Bookmarks { get; set; }
    public DbSet<Purchase> Purchases { get; set; }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.UseNpgsql(_connectionString);
    }
}

和appsettings.json

{
  "ConnectionStrings": {
    "Recipes" : "connection string is here"
  },
  "Logging": {
    "LogLevel": {
      "Default": "Debug",
      "System": "Information",
      "Microsoft": "Information"
    }
  }
}

Answer 1

好的，我已经为我的案件解决了。是.Designer.cs个文件，我丢失了。

如果丢失，您将遇到同样的问题