EF Core2.0 dbvalidation 错误未显示所有错误
EF Core2.0 dbvalidation errors not displaying all errors
我创建了一个 EF 核心 2.0 应用程序并尝试在 Savechanges 上验证模型,但它只是 return 第一个验证错误。
这是我的 Dbcontext 和控制器
public partial class ProductWarehouseContext : DbContext
{ public List<string> ErrorList=new List<string>();
public ProductWarehouseContext(DbContextOptions<ProductWarehouseContext> options)
: base(options)
{
}
public virtual DbSet<Customer> Customer { get; set; }
public virtual DbSet<Order> Order { get; set; }
public virtual DbSet<OrderItem> OrderItem { get; set; }
public virtual DbSet<Product> Product { get; set; }
public virtual DbSet<Supplier> Supplier { get; set; }
public override int SaveChanges()
{
var entities = from e in ChangeTracker.Entries()
where e.State == EntityState.Added
|| e.State == EntityState.Modified
select e.Entity;
foreach (var entity in entities)
{
var validationContext = new ValidationContext(entity);
Validator.ValidateObject(
entity,
validationContext,
validateAllProperties: true);
}
return base.SaveChanges();}
}
控制器
[HttpPost]
public IActionResult Save([FromBody]CustomerViewModel customer)
{
using (var cont = _context.Database.BeginTransaction())
{
try
{
var cust = new Customer()
{
FirstName = customer.FirstName,
LastName = customer.LastName,
City = customer.City,
Country = customer.Country,
Phone = customer.Phone,
IsSubscribedforAlerts = customer.IsSubscribedforAlerts
};
_context.Customer.Add(cust);
_context.SaveChanges();
cont.Commit();
}
catch (Exception e)
{
Errors.Add(e.Message);
cont.Rollback();
foreach (var err in Errors)
{
ModelState.AddModelError("errors", err);
}
return Ok(ModelState);
}
}
return Ok();
}
Class
public partial class Customer
{
public Customer()
{
Order = new HashSet<Order>();
}
public int Id { get; set; }
[Required(ErrorMessage = "FirstName is required to save a new customer")]
public string FirstName { get; set; }
[Required(ErrorMessage = "LastName is required to save a new customer")]
public string LastName { get; set; }
public string City { get; set; }
public string Country { get; set; }
[Required(ErrorMessage = "PhoneNumber is required to save a new customer")]
public string Phone { get; set; }
public bool? IsSubscribedforAlerts { get; set; }
public ICollection<Order> Order { get; set; }
}
错误只是 returnig“"firstname" 是必需的,如果我在请求对象中传递名字,那么它的 returning "lastname" 是必需的。
我应该如何处理 return 所有错误我们如何使用 DbEntityValidationException 在 EF6 中做到这一点?
那是因为 ValidateObject()
在第一次遇到错误时抛出。尝试使用 TryValidateObject()
代替,并向其传递一个累积所有错误的 List<ValidationResult>
。
类似于:
public class EntityValidationException : Exception
{
public EntityValidationException(IEnumerable<ValidationException> exceptions)
{
this.ValidationErrors = exceptions;
}
public IEnumerable<ValidationException> ValidationErrors { get; }
}
然后在你的 SaveChanges()
:
foreach (var entity in entities)
{
var validationContext = new ValidationContext(entity);
var validationResults = new List<ValidationResult>();
Validator.TryValidateObject(entity, validationContext, validationResults);
if (validationResults.Any())
throw new EntityValidationException(validationResults.Select(x => new ValidationException(x, null, null)));
}
然后在你的 controller/action 中,你可以明确地处理 EntityValidationException
:
catch (EntityValidationException validationException)
{
foreach (var err in validationException.ValidationErrors)
{
var validationResult = err.ValidationResult;
ModelState.AddModelError(validationResult.MemberNames.First(), validationResult.ErrorMessage);
}
}
我创建了一个 EF 核心 2.0 应用程序并尝试在 Savechanges 上验证模型,但它只是 return 第一个验证错误。
这是我的 Dbcontext 和控制器
public partial class ProductWarehouseContext : DbContext
{ public List<string> ErrorList=new List<string>();
public ProductWarehouseContext(DbContextOptions<ProductWarehouseContext> options)
: base(options)
{
}
public virtual DbSet<Customer> Customer { get; set; }
public virtual DbSet<Order> Order { get; set; }
public virtual DbSet<OrderItem> OrderItem { get; set; }
public virtual DbSet<Product> Product { get; set; }
public virtual DbSet<Supplier> Supplier { get; set; }
public override int SaveChanges()
{
var entities = from e in ChangeTracker.Entries()
where e.State == EntityState.Added
|| e.State == EntityState.Modified
select e.Entity;
foreach (var entity in entities)
{
var validationContext = new ValidationContext(entity);
Validator.ValidateObject(
entity,
validationContext,
validateAllProperties: true);
}
return base.SaveChanges();}
}
控制器
[HttpPost]
public IActionResult Save([FromBody]CustomerViewModel customer)
{
using (var cont = _context.Database.BeginTransaction())
{
try
{
var cust = new Customer()
{
FirstName = customer.FirstName,
LastName = customer.LastName,
City = customer.City,
Country = customer.Country,
Phone = customer.Phone,
IsSubscribedforAlerts = customer.IsSubscribedforAlerts
};
_context.Customer.Add(cust);
_context.SaveChanges();
cont.Commit();
}
catch (Exception e)
{
Errors.Add(e.Message);
cont.Rollback();
foreach (var err in Errors)
{
ModelState.AddModelError("errors", err);
}
return Ok(ModelState);
}
}
return Ok();
}
Class
public partial class Customer
{
public Customer()
{
Order = new HashSet<Order>();
}
public int Id { get; set; }
[Required(ErrorMessage = "FirstName is required to save a new customer")]
public string FirstName { get; set; }
[Required(ErrorMessage = "LastName is required to save a new customer")]
public string LastName { get; set; }
public string City { get; set; }
public string Country { get; set; }
[Required(ErrorMessage = "PhoneNumber is required to save a new customer")]
public string Phone { get; set; }
public bool? IsSubscribedforAlerts { get; set; }
public ICollection<Order> Order { get; set; }
}
错误只是 returnig“"firstname" 是必需的,如果我在请求对象中传递名字,那么它的 returning "lastname" 是必需的。 我应该如何处理 return 所有错误我们如何使用 DbEntityValidationException 在 EF6 中做到这一点?
那是因为 ValidateObject()
在第一次遇到错误时抛出。尝试使用 TryValidateObject()
代替,并向其传递一个累积所有错误的 List<ValidationResult>
。
类似于:
public class EntityValidationException : Exception
{
public EntityValidationException(IEnumerable<ValidationException> exceptions)
{
this.ValidationErrors = exceptions;
}
public IEnumerable<ValidationException> ValidationErrors { get; }
}
然后在你的 SaveChanges()
:
foreach (var entity in entities)
{
var validationContext = new ValidationContext(entity);
var validationResults = new List<ValidationResult>();
Validator.TryValidateObject(entity, validationContext, validationResults);
if (validationResults.Any())
throw new EntityValidationException(validationResults.Select(x => new ValidationException(x, null, null)));
}
然后在你的 controller/action 中,你可以明确地处理 EntityValidationException
:
catch (EntityValidationException validationException)
{
foreach (var err in validationException.ValidationErrors)
{
var validationResult = err.ValidationResult;
ModelState.AddModelError(validationResult.MemberNames.First(), validationResult.ErrorMessage);
}
}