Trying to use entity framework scaffolding with firebird database 3.0, and i get error

[Mindaugas]

Hello,

I get this error when i try to use entity framework scaffold.

command:

dotnet ef dbcontext scaffold "User=SYSDBA;Password=***;Database=\tt\tt\tt\tt.fdb;DataSource=localhost;Port=3050;Dialect=3;Charset=UTF8;Role=;Connection lifetime=15;Pooling=true;MinPoolSize=0;MaxPoolSize=50;Packet Size=8192;ServerType=0;" FirebirdSql.EntityFrameworkCore.Firebird --output-dir Models --context TTDbContext --context-dir DataContext --force

this command hangs for some time and results with error:

System.InvalidOperationException: Sequence contains no matching element
   at System.Linq.ThrowHelper.ThrowNoMatchException()
   at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source, Func`2 predicate)
   at FirebirdSql.EntityFrameworkCore.Firebird.Scaffolding.Internal.FbDatabaseModelFactory.GetIndexes(DbConnection connection, IReadOnlyList`1 tables, Func`2 tableFilter)
   at FirebirdSql.EntityFrameworkCore.Firebird.Scaffolding.Internal.FbDatabaseModelFactory.GetTables(DbConnection connection, Func`2 filter)
   at FirebirdSql.EntityFrameworkCore.Firebird.Scaffolding.Internal.FbDatabaseModelFactory.Create(DbConnection connection, DatabaseModelFactoryOptions options)
   at FirebirdSql.EntityFrameworkCore.Firebird.Scaffolding.Internal.FbDatabaseModelFactory.Create(String connectionString, DatabaseModelFactoryOptions options)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.ReverseEngineerScaffolder.ScaffoldModel(String connectionString, DatabaseModelFactoryOptions databaseOptions, ModelReverseEngineerOptions modelOptions, ModelCodeGenerationOptions codeOptions)
   at Microsoft.EntityFrameworkCore.Design.Internal.DatabaseOperations.ScaffoldContext(String provider, String connectionString, String outputDir, String outputContextDir, String dbContextClassName, IEnumerable`1 schemas, IEnumerable`1 tables, String modelNamespace, String contextNamespace, Boolean useDataAnnotations, Boolean overwriteFiles, Boolean useDatabaseNames, Boolean suppressOnConfiguring, Boolean noPluralize)
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContextImpl(String provider, String connectionString, String outputDir, String outputDbContextDir, String dbContextClassName, IEnumerable`1 schemaFilters, IEnumerable`1 tableFilters, String modelNamespace, String contextNamespace, Boolean useDataAnnotations, Boolean overwriteFiles, Boolean useDatabaseNames, Boolean suppressOnConfiguring, Boolean noPluralize)
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContext.<>c__DisplayClass0_0.<.ctor>b__0()
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__DisplayClass3_0`1.<Execute>b__0()
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
Sequence contains no matching element


Maybe you could help me solve this issue or point me to some debugging directions?

[Daniel Rail]

Hi,

I'm also encountering this error.  I'm using .Net 10, Firebird's EF Core version 13 and Firebird 4. 

Any help would be appreciated.

Daniel

[Jiří Činčura]

https://github.com/FirebirdSQL/NETProvider/issues/1188

--
Mgr. Jiří Činčura
https://www.tabsoverspaces.com/

[Daniel Rail]

Jiri,

Thank you for the information.

Do you have an estimate when the fix will be available?

Daniel Rail

---

From: firebird-n...@googlegroups.com <firebird-n...@googlegroups.com> on behalf of Jiří Činčura <ji...@cincura.net>
Sent: Friday, March 6, 2026 8:54 AM
To: 'Mr. John' via firebird-net-provider <firebird-n...@googlegroups.com>
Subject: Re: [firebird-net-provider] Re: Trying to use entity framework scaffolding with firebird database 3.0, and i get error

 

--
Support the ongoing development of Firebird! Consider donating to the
Firebird Foundation and help ensure its future. Every contribution makes
a difference. Learn more and donate here:
https://www.firebirdsql.org/donate.
---
You received this message because you are subscribed to the Google Groups "firebird-net-provider" group.
To unsubscribe from this group and stop receiving emails from it, send an email to firebird-net-pro...@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/firebird-net-provider/6cd67ff9-5afb-48b2-8401-39e065e32709%40app.fastmail.com.

[Jiří Činčura]

There's a PR for it. But changes are requested. I guess you can take over.

--
Mgr. Jiří Činčura
https://www.tabsoverspaces.com/

On Fri, Mar 6, 2026, at 14:55, Daniel Rail wrote:
> Jiri,
>
> Thank you for the information.
>
> Do you have an estimate when the fix will be available?
>
> Daniel Rail

> *From:* firebird-n...@googlegroups.com

> <firebird-n...@googlegroups.com> on behalf of Jiří Činčura
> <ji...@cincura.net>

> *Sent:* Friday, March 6, 2026 8:54 AM
> *To:* 'Mr. John' via firebird-net-provider
> <firebird-n...@googlegroups.com>
> *Subject:* Re: [firebird-net-provider] Re: Trying to use entity

> https://groups.google.com/d/msgid/firebird-net-provider/MN0PR20MB4814945E8AAE47456D2405E4F67AA%40MN0PR20MB4814.namprd20.prod.outlook.com
> <https://groups.google.com/d/msgid/firebird-net-provider/MN0PR20MB4814945E8AAE47456D2405E4F67AA%40MN0PR20MB4814.namprd20.prod.outlook.com?utm_medium=email&utm_source=footer>.