api - FluentValidator 和 JsonPatchDocument

Question

我有 WebAPI (.NET Core) 并使用 FluentValidator 来验证模型，包括更新。
我使用 PATCH 动词并有以下方法:

    public IActionResult Update(int id, [FromBody] JsonPatchDocument<TollUpdateAPI> jsonPatchDocument)
    {

另外，我有一个验证器类:

public class TollUpdateFluentValidator : AbstractValidator<TollUpdateAPI>
{
    public TollUpdateFluentValidator ()
    {
        RuleFor(d => d.Date)
            .NotNull().WithMessage("Date is required");

        RuleFor(d => d.DriverId)
            .GreaterThan(0).WithMessage("Invalid DriverId");

        RuleFor(d => d.Amount)
            .NotNull().WithMessage("Amount is required");

        RuleFor(d => d.Amount)
            .GreaterThanOrEqualTo(0).WithMessage("Invalid Amount");
    }
}

并在 Startup 类中映射此验证器:

        services.AddTransient<IValidator<TollUpdateAPI>, TollUpdateFluentValidator>();

但它不起作用。如何为我的任务编写有效的 FluentValidator？

Answer 1

您将需要手动触发验证。
您的操作方法将是这样的:

public IActionResult Update(int id, [FromBody] JsonPatchDocument<TollUpdateAPI> jsonPatchDocument)
{
    // Load your db entity
    var myDbEntity = myService.LoadEntityFromDb(id);

    // Copy/Map data to the entity to patch using AutoMapper for example
    var entityToPatch = myMapper.Map<TollUpdateAPI>(myDbEntity);

    // Apply the patch to the entity to patch
    jsonPatchDocument.ApplyTo(entityToPatch);

    // Trigger validation manually
    var validationResult = new TollUpdateFluentValidator().Validate(entityToPatch);
    if (!validationResult.IsValid)
    {
        // Add validation errors to ModelState
        foreach (var error in validationResult.Errors)
        {
            ModelState.AddModelError(error.PropertyName, error.ErrorMessage);
        }

        // Patch failed, return 422 result
        return UnprocessableEntity(ModelState);
    }

    // Map the patch to the dbEntity
    myMapper.Map(entityToPatch, myDbEntity);
    myService.SaveChangesToDb();

    // So far so good, patch done
    return NoContent();
}