Comment by dh2022
1 hour ago
To solve this problem I have seen the following pattern:
1. Create an abstract base class named MigrationBaseClass 2. Have all migrations classes inherit from MigrationBaseClass 3. Use .Net Reflection to get all types that inherit from MigrationBaseClass 4. Do something with these types.
Doesn't even need to be an abstract base class. It's just as easy to use reflection to find all implementations in an assembly of an IMigration interface.
(ETA: Though my favorite pattern here became using DI for this instead of reflection. For every IMigration have a `services.AddTransient<IMigration, SomeMigrationImplementationClass>()` somewhere and then your service to run all migrations can just request from DI `IEnumerable<IMigration>`. I can then put the Reflection into a unit test to make sure everything that implements IMigration is registered in the DI container. But using DI in the main assembly to register all the migrations rather than Reflection leaves more room to try to AOT compile the assembly in production builds.)
yeah, there's plenty of ways to do that. I like having the attribute there so that there is a strong hint that some magic is happening somewhere with that class.