Register EF Core using IDbContextFactory in ASP.NET Core Mvc
asp.net-core-mvc c# entity-framework-core
Question
I've created a project App.Data that contains domain objects and a base class that implements IDbContextFactory<T> for creating a DbContext. The code is available here.
Generating the migrations in a seperate assembly works well.
What I would like to utilize the context I've created in App.Data.Sql that is created via an SqlDbContextFactory<MyAppDbContext> when registering entity framework within asp.net mvc.
What I want to have is something like
services.AddEntityFrameworkSqlServer()
.AddDbContext(typeof(SqlDbContextFactory<MyAppDbContext>))
Registering it as a singleton doesn't work since when resolved complains about no provider has been configured.
services.AddSingleton<IDbContextFactory<..>, SqlDbContextFactory<..>>();
services.AddScoped<MyApp..>(p => p.GetRequiredService<IDb..>().Create());
Popular Answer
Instead of .AddDbContext(typeof(...)) provide a factory method to create context:
services.AddTransient(provider =>
{
//if needed: anything from DI
var bar = provider.GetService<TBar>();
//if needed: external captured variable
doSomething(service);
//explicit context creation
return new FooDbContext(...);
});
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