Question

我知道已经多次询问过这个问题，但是我已经调查了所有解决方案，但这些解决方案都没有解决我的问题。我面临的问题是出现在远程服务器上。我在我的本地服务器上使用MVC5，EntityFramework6和MySQL 5.7，解决方案在我的本地服务器上运行无异常或错误。但是当我将我的解决方案加载到远程服务器时，会出现问题。这是例外

Table 'db_a185f5_ems.tmpidentity_employee' doesn't exist

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: MySql.Data.MySqlClient.MySqlException: Table 'db_a185f5_ems.tmpidentity_employee' doesn't exist

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:    

[MySqlException (0x80004005): Table 'db_a185f5_ems.tmpidentity_employee' doesn't exist]
   MySql.Data.MySqlClient.MySqlStream.ReadPacket() +306
   MySql.Data.MySqlClient.NativeDriver.GetResult(Int32& affectedRow, Int64& insertedId) +67
   MySql.Data.MySqlClient.Driver.GetResult(Int32 statementId, Int32& affectedRows, Int64& insertedId) +17
   MySql.Data.MySqlClient.Driver.NextResult(Int32 statementId, Boolean force) +110
   MySql.Data.MySqlClient.MySqlDataReader.NextResult() +772
   MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) +1512
   MySql.Data.Entity.EFMySqlCommand.ExecuteDbDataReader(CommandBehavior behavior) +33
   System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior) +12
   System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.<Reader>b__c(DbCommand t, DbCommandInterceptionContext`1 c) +9
   System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch(TTarget target, Func`3 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed) +72
   System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader(DbCommand command, DbCommandInterceptionContext interceptionContext) +355
   System.Data.Entity.Internal.InterceptableDbCommand.ExecuteDbDataReader(CommandBehavior behavior) +167
   System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior) +12
   System.Data.Entity.Core.Mapping.Update.Internal.DynamicUpdateCommand.Execute(Dictionary`2 identifierValues, List`1 generatedValues) +234
   System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update() +139

[UpdateException: An error occurred while updating the entries. See the inner exception for details.]
   System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update() +319
   System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.<Update>b__2(UpdateTranslator ut) +9
   System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update(T noChangesResult, Func`2 updateFunction) +120
   System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update() +77
   System.Data.Entity.Core.Objects.ObjectContext.<SaveChangesToStore>b__35() +11
   System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction(Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess) +288
   System.Data.Entity.Core.Objects.ObjectContext.SaveChangesToStore(SaveOptions options, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction) +163
   System.Data.Entity.Core.Objects.<>c__DisplayClass2a.<SaveChangesInternal>b__27() +22
   System.Data.Entity.Infrastructure.DefaultExecutionStrategy.Execute(Func`1 operation) +9
   System.Data.Entity.Core.Objects.ObjectContext.SaveChangesInternal(SaveOptions options, Boolean executeInExistingTransaction) +222
   System.Data.Entity.Core.Objects.ObjectContext.SaveChanges(SaveOptions options) +7
   System.Data.Entity.Internal.InternalContext.SaveChanges() +114

[DbUpdateException: An error occurred while updating the entries. See the inner exception for details.]
   System.Data.Entity.Internal.InternalContext.SaveChanges() +199
   System.Data.Entity.Internal.LazyInternalContext.SaveChanges() +27
   System.Data.Entity.DbContext.SaveChanges() +20
   EMS.Controllers.<CreateEmployee>d__54.MoveNext() in c:\Users\Hira\Documents\Visual Studio 2013\Projects\EMS\EMS\Controllers\AdministratorController.cs:401
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +92
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58
   System.Web.Mvc.Async.TaskAsyncActionDescriptor.EndExecute(IAsyncResult asyncResult) +97
   System.Web.Mvc.Async.<>c__DisplayClass37.<BeginInvokeAsynchronousActionMethod>b__36(IAsyncResult asyncResult) +17
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +32
   System.Web.Mvc.Async.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3d() +50
   System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +225
   System.Web.Mvc.Async.<>c__DisplayClass33.<BeginInvokeActionMethodWithFilters>b__32(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34
   System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c() +26
   System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +100
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27
   System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +13
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +36
   System.Web.Mvc.Controller.<BeginExecute>b__15(IAsyncResult asyncResult, Controller controller) +12
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +22
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +26
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
   System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +21
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +28
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9744261
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

此代码中出现此错误的行“ctxt.SaveChanges”：

public ActionResult CreateEmployee(CreateEmployeeViewModel model)
        {            
            if (ModelState.IsValid)
            {
                Employee emp = new Employee
                {
                    FirstName = model.FirstName,
                    LastName = model.LastName,
                    Email =model.Email,
                    JoiningDate = model.JoiningDate,                    
                    Username = model.Username,
                    Password = model.Password

                };
                ctxt.Employees.Add(emp);
                ctxt.SaveChanges();

            }
                return View(model);
        }

我在远程服务器上检查了我的表。他们都是Innodb。并且没有“tmpidentity”的表格，因为我没有创建任何这个。我已经使用代码第一种方法。远程服务器正在使用phpMyAdmin。

这是我的DbContext：

public class EMSDbContext : DbContext
{

    public static EMSDbContext Create()
    {
        return new EMSDbContext();
    }
    public DbSet<Administrator> Administrators { get; set; }
    public DbSet<Employee> Employees { get; set; }
    public DbSet<Client> Clients { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
      modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();           
      modelBuilder.Conventions.Remove<ForeignKeyIndexConvention>(); 
    }
}

Answer 1

我知道这个重播对你来说太晚了。这是为了其他人。我今天也遇到了同样的问题。我也没有对这个错误有所了解。之后我理解自动生成的guid是用mysql在触发器中维护的。由MySql连接器生成的触发器。我错过了它。我从另一个表复制粘贴触发器。我的问题已修复。

详细信息有https://musthaan.com/2017/06/13/getting-error-on-add-new-table-conjero-tmpidentity_project_consultant_order-doesnt-exist-on-mysql-codefirst-with-ef/

Answer 2

<强>更新

我已将主键从Guid更改为int，我不知道它是如何工作的。这是我之前的模特

 public class Employee
{       
    [Key]
    [Required]       
    public int EmployeeId { get; set; }

    public string FirstName { get; set; }      
    public string LastName { get; set; }
    public string Email { get; set; }
    public DateTime JoiningDate { get; set; }
    public string Username { get; set; }
    public string Password { get; set; }    
}

我刚刚将PK改为int类型。

\r?\n+(?!@\d+;)

任何人都可以解释这个。从这看起来我似乎必须在整个代码中更改pk类型。 Guid类型是否必须对远程服务器执行任何操作？

PS：我在远程服务器上使用基于Windows的平台。

远程服务器上发生异常：表'db_a185f5_ems.tmpidentity_employee'不存在

2 个答案: