Devart Forums

Posted: **Mon 11 Jul 2016 07:14**

Object reference not set to an instance of an object

at Devart.Common.Entity.ak.l()
   at Microsoft.EntityFrameworkCore.Storage.RelationalLoggerExtensions.LogCommandExecuted(ISensitiveDataLogger logger, DbCommand command, Int64 startTimestamp, Int64 currentTimestamp)
   at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.Execute(IRelationalConnection connection, String executeMethod, IReadOnlyDictionary`2 parameterValues, Boolean openConnection, Boolean closeConnection)
   at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteReader(IRelationalConnection connection, IReadOnlyDictionary`2 parameterValues, Boolean manageConnection)
   at Microsoft.EntityFrameworkCore.Update.ReaderModificationCommandBatch.Execute(IRelationalConnection connection)

Reproduce step:
Devart.Data.MySql.Entity.EFCore.dll, 8.6.687.0
net451, dotnet core 1.0.0-RTM

_dbcontext.Registrations.Add(new ABC{
Name = "abc",
// Username = ?, Not null column, but not define required
});
_dbcontext.SaveChanges();

Expected: MySQL error message
Actual: Object reference not set to an instance of an object

Posted: **Wed 13 Jul 2016 16:55**

Thank you for the report. We are processing your request.

Posted: **Mon 18 Jul 2016 15:46**

We cannot reproduce the issue in our environment. Please send us a small test project with the corresponding DDL/DML script for reproducing.

In case of >2MB attachment, we recommend either using some file exchange server (send us the corresponding link) or uploading a test project to our FTP server (the credentials will be provided by email request).

Posted: **Thu 28 Jul 2016 01:22**

I got supported.

Root cause:
We have reproduced System.NullReferenceException when EF Core logging is enabled (https://docs.efproject.net/en/latest/mi ... gging.html).

Temporary workaround:
Please disable EF Core logging and use the dbMonitor tool (http://www.devart.com/dotconnect/mysql/ ... nitor.html).

Cheers

Posted: **Thu 11 Aug 2016 15:34**

The bug with using EF Core logging is fixed in the newest (8.6.714) build of dotConnect for MySQL.

Devart Forums

Object Null Ref when save changes adding new entity

Object Null Ref when save changes adding new entity

Re: Object Null Ref when save changes adding new entity

Re: Object Null Ref when save changes adding new entity

Re: Object Null Ref when save changes adding new entity

Re: Object Null Ref when save changes adding new entity