EF Core Add-Migrations problem when using AddDbContextFactory

[richardbartley]

When adding ApplicationDbContext (based on BaseDbContext : MultiTenantIdentityDbContext), I can do EF migrations as if finds the Tenant.

.AddDbContext<ApplicationDbContext>( m => m.UseDatabase(dbProvider, rootConnectionString))

However, when using the Factory approach,

.AddDbContextFactory<ApplicationDbContext>(
                m => m.UseDatabase(dbProvider, rootConnectionString)

the EF Add-Migrations tooling fails with this error.

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.InvalidOperationException: Unable to resolve service for type 'Finbuckle.MultiTenant.ITenantInfo' while attempting to activate 'MyProject.API.Infrastructure.Persistence.Context.ApplicationDbContext'.

What can I do to resolve this while using the AddDbContextFactory?

[AndrewTriesToCode]

@richardbartley I appreciate you bringing this up. I don't have a good answer at the moment and haven't gotten into DbContextFactory much myself -- I realize its important in Blazor and I need to do so.

In this case is it trying to spin up a dbcontext outside of an HttpRequest? Like at startup or in a background service?

[richardbartley]

Yes its a problem in StartUp and when using the Add-Migration tooling. It doesn't know the TenantInfo. Wonder if there is a trick to provide one perhaps at DesignTime?

[stale[bot]]

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[enkodellc]

We are getting a similar error when trying to use an Id

        private readonly IDbContextFactory<ApplicationDbContext> _dbContextFactory;
        
        using var appDbContext = _appDbContextFactory.CreateDbContext();

    (Unable to resolve service for type 'Finbuckle.MultiTenant.TenantInfo' while attempting to activate 'BlazorBoilerplate.Storage.ApplicationDbContext'.) ---> System.InvalidOperationException: Unable to resolve service for type 'Finbuckle.MultiTenant.TenantInfo' while attempting to activate 'BlazorBoilerplate.Storage.ApplicationDbContext' 

[AndrewTriesToCode]

One idea is to register a "dummy" interface in DI which uses a lambda to instantiate your dbcontext with a constructor of your choice, i.e. one that isn't dependent on the tenant.