8.0.0-alpha-3 System.InvalidCastException: Object cannot be cast from DBNull to
other types.
--------------------------------------------------------------------------------------------
Key: DNET-1019
URL: http://tracker.firebirdsql.org/browse/DNET-1019
Project: .NET Data provider
Issue Type: Bug
Components: Entity Framework Core
Affects Versions: 8.0.0.0
Environment: Windows 10 VS 2019 v16.8 Framework v4.8
Reporter: Lynn Bennett
Assignee: Jiri Cincura
<PackageReference Include="FirebirdSql.Data.FirebirdClient"
Version="8.0.0-alpha3" />
<PackageReference Include="FirebirdSql.EntityFrameworkCore.Firebird"
Version="8.0.0-alpha3" />
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="5.0.3" />
Scaffold-DbContext -Provider FirebirdSql.EntityFrameworkCore.Firebird
-Connection "localhost..." -Tables CT_RELAYS_VIEW
-DataAnnotations -UseDatabaseNames
System.InvalidCastException: Object cannot be cast from DBNull to other types.
at System.DBNull.System.IConvertible.ToInt32(IFormatProvider provider)
at System.Convert.ToInt32(Object value, IFormatProvider provider)
at FirebirdSql.Data.Common.DbValue.GetInt32(AsyncWrappingCommonArgs async)
at FirebirdSql.Data.FirebirdClient.FbDataReader.GetInt32(Int32 i)
at
FirebirdSql.EntityFrameworkCore.Firebird.Scaffolding.Internal.FbDatabaseModelFactory.GetTables(DbConnection
connection, Func`3 filter)
Firebird 2.5.3 (Windows Build)
CREATE TABLE CT_RELAYS_VIEW
(
RELAY_TAG integer,
ELEMENT_DESIGNATION char(21),
ELEMENT_CODE char(4),
DS_ZONE_NUMBER char(2),
CT_TYPE char(2),
CT_NAME char(11)
);
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