C# 外键不工作的自动验证核心2.1

我正在尝试在.NETCore2.1中设置一个API。我一直在关注这一点，并遇到了模型不能自动验证的问题（根据）。具体地说，我想确保，如果发送POST请求时带有不存在的ForeignKey，那么我应该得到BadRequest响应。如果发送了正确的外键，则正确处理请求

行动：
发送POST请求以添加不存在CustomerId的活动

预期的：
接收请求响应

实际值：
由于未处理的DbUpdateException，API崩溃

我的文件如下所示：

Context.cs

    public class Context : DbContext
    {
         public Context(DbContextOptions<Context> options)
       : base(options)
        { }

    public DbSet<Customer> Customers { get; set; }
    public DbSet<Campaign> Campaigns { get; set; }
    }

{
    public class Customer
    {
        public long Id { get; set; }
        public string Name { get; set; }
        public List<Campaign> Campaigns { get; set; }
    }
}

    [Route("api/[controller]")]
    [ApiController]
    public class CampaignController : ControllerBase
    {
        private readonly Context _context;

        public CampaignController(Context context)
        {
            _context = context;
        }

        //Get Methods

        [HttpPost]
        public IActionResult Create(Campaign campaign)
        {
            _context.Campaigns.Add(campaign);
            _context.SaveChanges();
            return CreatedAtRoute("GetCustomer", new { id = campaign.Id }, campaign);
        }

    }

    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
        var connection = @"Server=(localdb)\mssqllocaldb;Trusted_Connection=True;ConnectRetryCount=0";
        services.AddDbContext<Context>(options => options.UseSqlServer(connection));
    }

Customer.cs

    public class Context : DbContext
    {
         public Context(DbContextOptions<Context> options)
       : base(options)
        { }

    public DbSet<Customer> Customers { get; set; }
    public DbSet<Campaign> Campaigns { get; set; }
    }

{
    public class Customer
    {
        public long Id { get; set; }
        public string Name { get; set; }
        public List<Campaign> Campaigns { get; set; }
    }
}

    [Route("api/[controller]")]
    [ApiController]
    public class CampaignController : ControllerBase
    {
        private readonly Context _context;

        public CampaignController(Context context)
        {
            _context = context;
        }

        //Get Methods

        [HttpPost]
        public IActionResult Create(Campaign campaign)
        {
            _context.Campaigns.Add(campaign);
            _context.SaveChanges();
            return CreatedAtRoute("GetCustomer", new { id = campaign.Id }, campaign);
        }

    }

    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
        var connection = @"Server=(localdb)\mssqllocaldb;Trusted_Connection=True;ConnectRetryCount=0";
        services.AddDbContext<Context>(options => options.UseSqlServer(connection));
    }

Startup.cs

    public class Context : DbContext
    {
         public Context(DbContextOptions<Context> options)
       : base(options)
        { }

    public DbSet<Customer> Customers { get; set; }
    public DbSet<Campaign> Campaigns { get; set; }
    }

{
    public class Customer
    {
        public long Id { get; set; }
        public string Name { get; set; }
        public List<Campaign> Campaigns { get; set; }
    }
}

    [Route("api/[controller]")]
    [ApiController]
    public class CampaignController : ControllerBase
    {
        private readonly Context _context;

        public CampaignController(Context context)
        {
            _context = context;
        }

        //Get Methods

        [HttpPost]
        public IActionResult Create(Campaign campaign)
        {
            _context.Campaigns.Add(campaign);
            _context.SaveChanges();
            return CreatedAtRoute("GetCustomer", new { id = campaign.Id }, campaign);
        }

    }

    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
        var connection = @"Server=(localdb)\mssqllocaldb;Trusted_Connection=True;ConnectRetryCount=0";
        services.AddDbContext<Context>(options => options.UseSqlServer(connection));
    }

公共启动（IConfiguration配置）
{
配置=配置；
}
公共IConfiguration配置{get；}
public void配置服务（IServiceCollection服务）
{
services.AddMvc（）.SetCompatibilityVersion（CompatibilityVersion.Version_2_1）；
var connection=@“服务器=（localdb）\mssqllocaldb；可信连接=True；ConnectRetryCount=0”；
services.AddDbContext（options=>options.UseSqlServer（connection））；
}

它不应该那样工作。控制器不会验证您的DB外键。验证用于验证ViewModel约束，如

[必需]

文件：