尽管该行已加载到 EF 更改跟踪器中或未加载到 entity framework 中,但如何更新实体?
How to update entity desipite the row is loaded in EF change tracker or not in entity framework?
我已经查看了那个问题的所有内容,但是 none 他们为 me.Everyone 工作是建议使用 AsNoTracking()
来解决那个问题,但它对我的问题没有意义,因为我不更新我从数据库中调用的数据。
我有公司资料更新模式,这家公司可以有资料照片也可以没有,但无论哪种方式我都需要更新这些信息。所以这就是为什么我需要控制是公司创建照片还是更新照片。让我在下面向您展示我的代码:
#region /*UpdateCompanyProfile*/
[HttpPost]
public IActionResult UpdateCompanyProfile(Company company, List<IFormFile> files, int FileID)
{
try
{
if (ModelState.IsValid)
{
company.ModifiedDate = DateTime.Now;
_unitOfWorkC.RepositoryCompany.Update(company);
int firstRequest = HttpContext.Response.StatusCode;
if (firstRequest == 200)
{
_unitOfWorkC.Complete();
if (files.Count != 0)
{
var File = _fileUploader.FileUploadToDatabase(files);
var FileResult = File.Result;
FileResult.CompanyID = company.CompanyID;
if (FileID == 0)//That's the point where i control that file, is it gonna be update or create.
{
_unitOfWorkFR.RepositoryFileRepo.Create(FileResult);
int secondRequest1 = HttpContext.Response.StatusCode;
if (secondRequest1 == 200)
{
int tryCatch = _unitOfWorkFR.Complete();
if (tryCatch != 15)
{
TempData["JS"] = "showSuccess();";
}
else
{
TempData["JS"] = "showError();";
}
}
}
else
{
FileResult.FileID = FileID;
_unitOfWorkFR.RepositoryFileRepo.Update(FileResult); //That's the point where i get the error.
int secondRequest2 = HttpContext.Response.StatusCode;
if (secondRequest2 == 200)
{
int tryCatch2 = _unitOfWorkFR.Complete();
if (tryCatch2 != 15)
{
TempData["JS"] = "showSuccess();";
}
else
{
TempData["JS"] = "showError();";
}
}
else
{
TempData["JS"] = "showError();";
}
}
}
}
else
{
TempData["Message"] = "?irket g?ncelleme i?leminiz ba?ar?s?z!";
TempData["JS"] = "showError();";
return RedirectToAction("CompanyProfile");
}
}
else
{
TempData["Message"] = "G??ncellemek istedi?iniz veri hatal?!";
TempData["JS"] = "showError();";
return RedirectToAction("CompanyProfile");
}
}
catch (Exception ex)
{
var log = _logging.Logging(ex.Message, "Exception/Hata", company.CompanyID.ToString(),
"CompanyProfile/UpdateCompanyProfile", getCurrentUser(), getCurrentUserClaimRole());
_unitOfWorkLog.RepositoryLog.Create(log);
_unitOfWorkLog.Complete();
//TempData["Message"] = ex.Message;
//TempData["JS"] = "showError();";
return RedirectToAction("CompanyProfile");
}
}
#endregion
如您所见,在我看来,使用 AsNoTracking()
调用该数据毫无意义。我只是在该操作中收到该错误,所以其他 FileRepo
操作运行良好。
那是我的 FileUploadToDatabase()
方法:
public async Task<FileRepo> FileUploadToDatabase(List<IFormFile> files)
{
foreach (var file in files)
{
var fileName = Path.GetFileNameWithoutExtension(file.FileName);
var fileExtension = Path.GetExtension(file.FileName);
_fileRepo = new FileRepo
{
FileName = fileName,
FileExtension = fileExtension,
FileType = file.ContentType,
CreatedDate= DateTime.Now
};
using (var dataStream = new MemoryStream())
{
await file.CopyToAsync(dataStream);
_fileRepo.FileData = dataStream.ToArray();
}
}
return _fileRepo;
}
那是我的 FileRepo
class :
public class FileRepo : Base
{
[Key]
public int FileID { get; set; }
[Required(ErrorMessage = "Required Field !")]
public string FileName { get; set; }
[Required(ErrorMessage = "Required Field !")]
public string FileType { get; set; }
[Required(ErrorMessage = "Required Field !")]
public string FileExtension { get; set; }
public string FilePath { get; set; }
public bool FilePhotoIsDefault { get; set; }
public byte[] FileData { get; set; }
public int? CompanyID { get; set; }
public Company Company { get; set; }
#endregion
}
那是我的 UnitOfWork :
这是我的存储库:
这是我的更新模式的查询:
public IEnumerable<Company> GetByIDForCompanyProfileCompany(int ID)
{
return TradeTurkDBContext.Companies.Where(x => x.CompanyID == ID)
.Include(x => x.Addresses.Where(x => x.IsDeleted == null || x.IsDeleted == false))
//
.Include(x => x.Products.Where(x => x.IsDeleted == null || x.IsDeleted == false))
.ThenInclude(x => x.FileRepos.Where(x => x.IsDeleted == null || x.IsDeleted == false)).AsSplitQuery()
//
.AsNoTrackingWithIdentityResolution().ToList();
}
您正在使用 DbSet.Update 更新 FileResult - 它正在尝试将实体附加到 ChangeTracker。如果已存在具有相同键的附加对象,则附加将失败。
将您的存储库更改为以下内容。如果实体不在 ChangeTracker
中,它将更新所有字段,否则它将只更正需要的属性:
public void Update(T model)
{
if (model == null)
throw new ArgumentNullException(nameof(model));
// I hope your generic repository knows Model Id property
var entry = _context.ChangeTracker.Entries<T>().FirstOrDefault(e => e.Entity.Id == model.Id);
if (entry == null)
{
// entity not tracked, so attach it
_dbSet.Update(model);
}
else
{
// setting values from not tracked object
if (!ReferenceEquals(model, entry.Entity))
entry.CurrentValues.SetValues(model);
}
}
更新
如果通用存储库不知道 Id
属性,您可以为其定义接口:
public interface IEntityWithId
{
int Id {get;}
}
确保您的 类 是 IEntityWithId
的实现。然后正确的存储库定义:
public interface IRepository<T> where T: class, IEntityWithId
{
...
}
我已经查看了那个问题的所有内容,但是 none 他们为 me.Everyone 工作是建议使用 AsNoTracking()
来解决那个问题,但它对我的问题没有意义,因为我不更新我从数据库中调用的数据。
我有公司资料更新模式,这家公司可以有资料照片也可以没有,但无论哪种方式我都需要更新这些信息。所以这就是为什么我需要控制是公司创建照片还是更新照片。让我在下面向您展示我的代码:
#region /*UpdateCompanyProfile*/
[HttpPost]
public IActionResult UpdateCompanyProfile(Company company, List<IFormFile> files, int FileID)
{
try
{
if (ModelState.IsValid)
{
company.ModifiedDate = DateTime.Now;
_unitOfWorkC.RepositoryCompany.Update(company);
int firstRequest = HttpContext.Response.StatusCode;
if (firstRequest == 200)
{
_unitOfWorkC.Complete();
if (files.Count != 0)
{
var File = _fileUploader.FileUploadToDatabase(files);
var FileResult = File.Result;
FileResult.CompanyID = company.CompanyID;
if (FileID == 0)//That's the point where i control that file, is it gonna be update or create.
{
_unitOfWorkFR.RepositoryFileRepo.Create(FileResult);
int secondRequest1 = HttpContext.Response.StatusCode;
if (secondRequest1 == 200)
{
int tryCatch = _unitOfWorkFR.Complete();
if (tryCatch != 15)
{
TempData["JS"] = "showSuccess();";
}
else
{
TempData["JS"] = "showError();";
}
}
}
else
{
FileResult.FileID = FileID;
_unitOfWorkFR.RepositoryFileRepo.Update(FileResult); //That's the point where i get the error.
int secondRequest2 = HttpContext.Response.StatusCode;
if (secondRequest2 == 200)
{
int tryCatch2 = _unitOfWorkFR.Complete();
if (tryCatch2 != 15)
{
TempData["JS"] = "showSuccess();";
}
else
{
TempData["JS"] = "showError();";
}
}
else
{
TempData["JS"] = "showError();";
}
}
}
}
else
{
TempData["Message"] = "?irket g?ncelleme i?leminiz ba?ar?s?z!";
TempData["JS"] = "showError();";
return RedirectToAction("CompanyProfile");
}
}
else
{
TempData["Message"] = "G??ncellemek istedi?iniz veri hatal?!";
TempData["JS"] = "showError();";
return RedirectToAction("CompanyProfile");
}
}
catch (Exception ex)
{
var log = _logging.Logging(ex.Message, "Exception/Hata", company.CompanyID.ToString(),
"CompanyProfile/UpdateCompanyProfile", getCurrentUser(), getCurrentUserClaimRole());
_unitOfWorkLog.RepositoryLog.Create(log);
_unitOfWorkLog.Complete();
//TempData["Message"] = ex.Message;
//TempData["JS"] = "showError();";
return RedirectToAction("CompanyProfile");
}
}
#endregion
如您所见,在我看来,使用 AsNoTracking()
调用该数据毫无意义。我只是在该操作中收到该错误,所以其他 FileRepo
操作运行良好。
那是我的 FileUploadToDatabase()
方法:
public async Task<FileRepo> FileUploadToDatabase(List<IFormFile> files)
{
foreach (var file in files)
{
var fileName = Path.GetFileNameWithoutExtension(file.FileName);
var fileExtension = Path.GetExtension(file.FileName);
_fileRepo = new FileRepo
{
FileName = fileName,
FileExtension = fileExtension,
FileType = file.ContentType,
CreatedDate= DateTime.Now
};
using (var dataStream = new MemoryStream())
{
await file.CopyToAsync(dataStream);
_fileRepo.FileData = dataStream.ToArray();
}
}
return _fileRepo;
}
那是我的 FileRepo
class :
public class FileRepo : Base
{
[Key]
public int FileID { get; set; }
[Required(ErrorMessage = "Required Field !")]
public string FileName { get; set; }
[Required(ErrorMessage = "Required Field !")]
public string FileType { get; set; }
[Required(ErrorMessage = "Required Field !")]
public string FileExtension { get; set; }
public string FilePath { get; set; }
public bool FilePhotoIsDefault { get; set; }
public byte[] FileData { get; set; }
public int? CompanyID { get; set; }
public Company Company { get; set; }
#endregion
}
那是我的 UnitOfWork :
这是我的存储库:
这是我的更新模式的查询:
public IEnumerable<Company> GetByIDForCompanyProfileCompany(int ID)
{
return TradeTurkDBContext.Companies.Where(x => x.CompanyID == ID)
.Include(x => x.Addresses.Where(x => x.IsDeleted == null || x.IsDeleted == false))
//
.Include(x => x.Products.Where(x => x.IsDeleted == null || x.IsDeleted == false))
.ThenInclude(x => x.FileRepos.Where(x => x.IsDeleted == null || x.IsDeleted == false)).AsSplitQuery()
//
.AsNoTrackingWithIdentityResolution().ToList();
}
您正在使用 DbSet.Update 更新 FileResult - 它正在尝试将实体附加到 ChangeTracker。如果已存在具有相同键的附加对象,则附加将失败。
将您的存储库更改为以下内容。如果实体不在 ChangeTracker
中,它将更新所有字段,否则它将只更正需要的属性:
public void Update(T model)
{
if (model == null)
throw new ArgumentNullException(nameof(model));
// I hope your generic repository knows Model Id property
var entry = _context.ChangeTracker.Entries<T>().FirstOrDefault(e => e.Entity.Id == model.Id);
if (entry == null)
{
// entity not tracked, so attach it
_dbSet.Update(model);
}
else
{
// setting values from not tracked object
if (!ReferenceEquals(model, entry.Entity))
entry.CurrentValues.SetValues(model);
}
}
更新
如果通用存储库不知道 Id
属性,您可以为其定义接口:
public interface IEntityWithId
{
int Id {get;}
}
确保您的 类 是 IEntityWithId
的实现。然后正确的存储库定义:
public interface IRepository<T> where T: class, IEntityWithId
{
...
}