Extend UsingEfCoreSqlServer to be able to influence DbContextOptionsBuilder

[Nils Gruson]

My database is running in Azure SQL and my application is deployed to Azure Container Apps.
The container app is configured with a managed identity.
To connect to the database using the managed identity, I use a DbConnectionInterceptor implementation as described here: https://stackoverflow.com/questions/54187241/ef-core-connection-to-azure-sql-with-managed-identity.

I'd like to extend the UsingEfCoreSqlServer method from SetupExtensions.cs.
I'd like to pass in an optional action parameter to be able to call AddInterceptors on the DbContextOptionsBuilder.

Action<DbContextOptionsBuilder>? configureDbContextOptions = null

In the app setup, I then can do:

.UsingEfCoreSqlServer(
    myConnectionString,
    builder => builder.AddInterceptors(new AzureAuthenticationInterceptor())
)

Do you agree with this or should I have another approach to connect to SQL with a managed identity?

[Jon P Smith]

Hi @ngruson,

The AuthP library has a custom database feature, which allows you to control the creation of the DbContext - see Setup the custom database feature.

However I think there is a simpler approach - you copy the UsingEfCoreSqlServer code from the AuthPermissions/SetupExtensions class and add your Interceptor. See this section from my "Using custom databases with the AuthP library – Part1: normal apps" article which has a nice diagram.

[Nils Gruson]

Yep agreed, I can run my own extension method.