We use to get the following error when we try to run add-migration. We use Entity Framework Core 2.1. System.NullReferenceException: Object reference not set to
I did default Megration with User model, added only my two custom properties. EF created standard flow of tables. And my AspNetUsers table As you can see User
Is there a way to add DbSet<TEntity> Property in DbContext class at runtime without passing through OnModelCreating ?
I've been struggling with the issue/behaviour described below for while now and can't seem to figure out what's going on. This is all based on inherited/adapted
I have a Linq query which is selecting 2 columns(that can be any 2 from all columns) dynamically based on some condition.I need to map the query result in to be
Global query filters are very handy when implementing tenant and soft deletion features. But my problem is is that when i write a query with joins, for instance
I am basically trying to implement CRUD using EntityFrameWork core and .Net core 3.1. I have an issue with my update operation where I am not able update the co
There are some times where I have a user and would like to check whether they are in the organization that owns the item they are trying to access. Let's say th
I'm trying to process DB migrations during application startup in a Azure-hosted web API. However, no matter where I try to put it, I get the exception: ObjectD
I'm using EF core TPH inheritance to model some data and I'm trying to write a query that will query across different subtypes. My current attempt at writing a
I have a problem, in database I have an object of class Catalog with 3 elements in CatalogUsers. I want to replace that list with 2 element list being the orgin
I am trying to use JSON_ARRAYAGG(JSON_OBJECT(...)) in Entity Framework Core but I don't know much how to trick Entity Framework Core to use this function with a
I had some changes in my ef context and I added new Migraions dotnet ef migrations add changed98112601 then I run the below command dotnet ef database upd
I have an OData endpoint which query collection of Cosmos entity. The Cosmos DB container name is dynamic so that I cannot use entity.ToContainer("<container
I am trying seed the database with some data, using ASP.NET CORE 3.0 and EF Core. I've created my DbContext and according to documentation, online sources, or
I have an error on update entities use efcore and automapper: Entity cannot be tracked because another instance is with the same key value I saw some answers an
I deployed a test console app to a linux server and everything works fine but when the code execute an Entity Framework Core query, I get this message in the co
I have built a Book app in ASP.NET Core razor pages CRUD using Entity Framework. However, when I run the app and view it on https://localhost:44370/, the Foreig
I have this sample query: context.BarcodeTipiDoc.AsQueryable().Where(d => d.Barcode.CompareTo(minBarcode) > 0); That query runs very slow because Entit
My error: The corresponding CLR type for entity type 'Employee' is not instantiable and there is no derived entity type in the model that corresponds to a conc