Question

我定义了以下实体：

public class Customer
{
    public int CustomerId { get; set; }
    [Required]
    public string FirstName { get; set; }
    [Required]
    public string LastName { get; set; }
    [Required]
    public string PhoneNumber { get; set; }
    [Required]
    public string Email { get; set; }
    public ICollection<Call> Calls { get; set; }
}

我正在尝试在控制器方法中更新实体的字段：

[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Edit(int id, [Bind("CustomerId,FirstName,LastName,PhoneNumber,Email")] Customer customer)
{
    if (ModelState.IsValid)
    {
        _context.Update(customer);
        await _context.SaveChangesAsync();
        return RedirectToAction(nameof(Index));
    }
    return View(customer);
}
private readonly CustomerContext _context;

模型的所有值在视图中都已更改，并已正确传递给方法。 ModelState有效。所有方法都已执行，但毕竟在数据库中只更改了FirstName和LastName。其他属性没有。我检查了执行的SQL：

UPDATE [Customers] SET [FirstName] = @p0, [LastName] = @p1
WHERE [CustomerId] = @p2;

为什么不更新其他属性？

查看代码：

<h4>Customer</h4>
<hr />
<div class="row">
    <div class="col-md-4">
        <form asp-action="Edit">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            <input type="hidden" asp-for="CustomerId" />
            <div class="form-group">
                <label asp-for="FirstName" class="control-label"></label>
                <input asp-for="FirstName" class="form-control" />
                <span asp-validation-for="FirstName" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="LastName" class="control-label"></label>
                <input asp-for="LastName" class="form-control" />
                <span asp-validation-for="LastName" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="PhoneNumber" class="control-label"></label>
                <input asp-for="PhoneNumber" class="form-control" />
                <span asp-validation-for="PhoneNumber" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="Email" class="control-label"></label>
                <input asp-for="Email" class="form-control" />
                <span asp-validation-for="Email" class="text-danger"></span>
            </div>
            <div class="form-group">
                <input type="submit" value="Save" class="btn btn-default" />
            </div>
        </form>
    </div>
</div>

CustomerContext.cs

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

    public DbSet<Customer> Customers { get; set; }
    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Customer>().HasAlternateKey(cu => cu.PhoneNumber);
        modelBuilder.Entity<Customer>().HasAlternateKey(cu => cu.Email);
    }
}

Answer 1

原来问题的根源是备用键列，因为省略了键。我删除了它们并用索引替换它们，一切正常。

modelBuilder.Entity<Customer>().HasIndex(cu => cu.PhoneNumber).IsUnique();
modelBuilder.Entity<Customer>().HasIndex(cu => cu.Email).IsUnique();

仅更新模型的两个属性

1 个答案: