efcore.pg: Can't cast database type . to Geometry - Using Postgis extension

This repo is for Npgsql ADO.NET issues only. Entity Framework issues belong in Npgsql.EntityFrameworkCore.PostgreSQL for EF Core, or EntityFramework6.Npgsql for EF 6.x.

The issue

I have migrated an application Blazor WASM from .NET 6 to .NET 7. This application is using ABP.IO framework. After the migration, when I’m trying to query a table with a ‘geometry’ field type (Postgis extension), it is returning an exception as below:

[14:31:38 ERR] Can't cast database type .<unknown> to Geometry
System.InvalidCastException: Can't cast database type .<unknown> to Geometry
at Npgsql.Internal.TypeHandling.NpgsqlTypeHandler.ReadCustom[TAny](NpgsqlReadBuffer buf, Int32 len, Boolean async, FieldDescription fieldDescription)
at Npgsql.NpgsqlDataReader.GetFieldValue[T](Int32 ordinal)
at lambda_method5475(Closure, DbDataReader, Int32[])
at Microsoft.EntityFrameworkCore.Query.Internal.BufferedDataReader.BufferedDataRecord.ReadObject(DbDataReader reader, Int32 ordinal, ReaderColumn column)
at Microsoft.EntityFrameworkCore.Query.Internal.BufferedDataReader.BufferedDataRecord.ReadRow()
at Microsoft.EntityFrameworkCore.Query.Internal.BufferedDataReader.BufferedDataRecord.InitializeAsync(DbDataReader reader, IReadOnlyList1 columns, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Query.Internal.BufferedDataReader.InitializeAsync(IReadOnlyList1 columns, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Query.Internal.BufferedDataReader.InitializeAsync(IReadOnlyList1 columns, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Query.Internal.SplitQueryingEnumerable1.AsyncEnumerator.InitializeReaderAsync(AsyncEnumerator enumerator, CancellationToken cancellationToken)
at Npgsql.EntityFrameworkCore.PostgreSQL.Storage.Internal.NpgsqlExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func4 operation, Func4 verifySucceeded, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Query.Internal.SplitQueryingEnumerable1.AsyncEnumerator.MoveNextAsync() at Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.ToListAsync[TSource](IQueryable1 source, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.ToListAsync[TSource](IQueryable1 source, CancellationToken cancellationToken) at TVD_Holdings_Ltd.SBC.SBC.UnitsMap.UnitsMapAppService.GetTestRecordsFromTestPostgis() in D:\Source\SmartBridge\SbcWeb530\src\TVD_Holdings_Ltd.SBC.Application\SBC\UnitsMap\UnitsMapAppService.cs:line 89 at lambda_method5469(Closure, Object) at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.AwaitableObjectResultExecutor.Execute(ActionContext actionContext, IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask1 actionResultValueTask)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeInnerFilterAsync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextExceptionFilterAsync>g__Awaited|26_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)

I have created a new table and EF first code is creating the table correctly. But, adding a record on this I’m getting this exception:

[14:05:31 ERR] An exception occurred in the database while saving changes for context type 'TVD_Holdings_Ltd.SBC.EntityFrameworkCore.SBCDbContext'.
Microsoft.EntityFrameworkCore.DbUpdateException: An error occurred while saving the entity changes. See the inner exception for details.
---> Npgsql.NpgsqlException (0x80004005): The NpgsqlDbType 'Geometry' isn't present in your database. You may need to install an extension or upgrade to a newer version.

Does someone have any idea what could be wrong? If I return to the previous version, .NET 6, it works with no issues.

I’m using PG 15 and Postgis 3.3.2