LinqToDB.Common.LinqToDBConvertException: Cannot convert value '1/25/1980 12:00:00 AM: System.DateTime' to type 'System.DateOnly'

Not sure if .net 6.0 is completely supported at this point, but I’ve and issue with DateOnly fields. Query fails on materialization

Exception message: Cannot convert value '1/25/1980 12:00:00 AM: System.DateTime' to type 'System.DateOnly'

Stack trace:
LinqToDB.Common.LinqToDBConvertException: Cannot convert value '1/25/1980 12:00:00 AM: System.DateTime' to type 'System.DateOnly'
 ---> System.InvalidCastException: Invalid cast from 'System.DateTime' to 'System.DateOnly'.
   at System.Convert.DefaultToType(IConvertible value, Type targetType, IFormatProvider provider)
   at System.DateTime.System.IConvertible.ToType(Type type, IFormatProvider provider)
   at System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider)
   at LinqToDB.Common.ConvertBuilder.ConvertDefault(Object value, Type conversionType)
   --- End of inner exception stack trace ---
   at LinqToDB.Common.ConvertBuilder.ConvertDefault(Object value, Type conversionType)
   at lambda_method1066(Closure , IDataReader )
   at LinqToDB.Expressions.ConvertFromDataReaderExpression.ColumnReader.GetValue(IDataReader dataReader)
   at lambda_method1059(Closure , IQueryRunner , IDataReader )
   at LinqToDB.Linq.QueryRunner.Mapper`1.Map(IDataContext context, IQueryRunner queryRunner, IDataReader dataReader)
   at LinqToDB.Linq.QueryRunner.ExecuteQueryAsync[T](Query query, IDataContext dataContext, Mapper`1 mapper, Expression expression, Object[] ps, Object[] preambles, Int32 queryNumber, Func`2 func, TakeSkipDelegate skipAction, TakeSkipDelegate takeAction, CancellationToken cancellationToken)
   at LinqToDB.Linq.QueryRunner.ExecuteQueryAsync[T](Query query, IDataContext dataContext, Mapper`1 mapper, Expression expression, Object[] ps, Object[] preambles, Int32 queryNumber, Func`2 func, TakeSkipDelegate skipAction, TakeSkipDelegate takeAction, CancellationToken cancellationToken)
   at LinqToDB.Linq.QueryRunner.ExecuteQueryAsync[T](Query query, IDataContext dataContext, Mapper`1 mapper, Expression expression, Object[] ps, Object[] preambles, Int32 queryNumber, Func`2 func, TakeSkipDelegate skipAction, TakeSkipDelegate takeAction, CancellationToken cancellationToken)
   at LinqToDB.Linq.ExpressionQuery`1.GetForEachAsync(Action`1 action, CancellationToken cancellationToken)
   at LinqToDB.AsyncExtensions.ToListAsync[TSource](IQueryable`1 source, CancellationToken token)
   at Vtbf.Contractors.Application.CQRS.ContractorsLegal.ContractorLegalQueryByFilter.Handler.SelectWithSearchQueryAsync(ContractorLegalQueryByFilter request, CancellationToken cancellationToken) in /home/konstantin/sources/....cs:line 82

Steps to reproduce

Fails on materialization

Environment details

linq2db version: 3.6 Database Server: Postgres 14 Database Provider: Npgsql.EntityFrameworkCore.PostgreSQL 6.0.1 Operating system: Ubuntu 21.10 .NET Framework: .net 6.0

[viceroypenguin]

@SteveDunn I haven’t implemented TimeOnly yet - haven’t found a use for it yet. If you need it, I’ll put something together soon.

[MaceWindu]

You just need to define DateTime => DateOnly conversion in your mapping schema.

// e.g. to Default schema
MappingSchema.Default.SetConverter<DateTime, DateOnly>(dt => DateOnly.FromDateTime(dt));

but yes, we need to embedd those conversions into linq2db at some point.