framework-core | DEPRECATED ; see https | Application Framework library

In a .NET 5 web application, we use code such as the following in startup.cs to initialize the DB using Entity Framework:

I want to create a button such that if I click on it, it changes the entire column of a table in database. Please consider the code below:

Model:

I've created a MySQL In App database for my Azure App, and got the connection string for it. This string is injected into the application.json, and then used to create the actual connection:

I am trying to deploy my first web app on Heroku however I am getting a PyObjc error while pushing the code. I am doing this on a Mac Machine. This predictive application is developed using Flask. I do not know why this error is occurring as I do not have the PyObjc in my requirements.txt

I have a problem that I could not find the solution on Google. When I run my unit tests with PHPUnit and Xdebug, I would like to do a code coverage.

However, when I do that, I get this error:

I am trying to use DSC to install .NET 3.5 from source, as my server is not able to reach out directly to MSFT. But it is failing with error code 0x800f0954. Here is the code:

2 methods from my controller for some reason trigger this error: An exception occurred in the database while saving changes for context type 'API.Data.DataContext'. System.InvalidOperationException: A second operation was started on this context before a previous operation completed. This is usually caused by different threads concurrently using the same instance of DbContext

I have tried everything in this thread: Entity Framework Core: Entity Framework Core: A second operation started on this context before a previous operation completed But nothing seems to work for me.

ITs different for me because I cant use dbContext as tranziant

The issue happens in PowerUp and DeleteHero methods

Controller

I got rests that return:

java.io.InputStream,

com.fasterxml.jackson.databind.JsonNode,

org.springframework.core.io.InputStreamRecource

But

In result swagger-codegen generated api, i got rests, that return:

productName.client.model.InputStream,

ErrorModelNamenamespacecomFasterxmlJacksonDatabindNameJsonNode,

productName.client.model.InputStreamResource

I cant ignore them by .swagger-codegen-ignore

And i think that replacing java.io.InputStream by byte[] is not good (how it described here). Cause stream has some pluses, such as exclusion of memory leaks.

What interesting, Swagger understand, that classes from springframework.http must not be converted. I got them all as original in generated api.

Is it possiple to save java.io.InputStream and org.springframework.core.io.InputStreamRecource?

I'm developing an server-side Blazor-application, which uses EntityFramework-Core to create the Database (code-first). I want to use one of the models in an EditForm-component, but it throws an NullReferenceException on the _Host.cshtml, whenever I open the page, containing the EditForm-component. Other pages are working completely fine! Error in Rider Screenshot This is the error given on the page: