private readonly BandAlbumContext _db; // Made it private readonly because we only want to read values from the database. Underscore is a good choice to put before private variable names.
public BandAlbumRepository(BandAlbumContext db)
{
//Part from ?? checks if the context/database sent is empty. If empty, it throws an error
//with the name of db otherwise our injection is successfull. ?? is to check if smth is null.
_db = db ?? throw new ArgumentNullException(nameof(db));
}
public BandAlbumRepository(BandAlbumContext context)
{
_context = context ?? throw new ArgumentNullException(nameof(context));
}
public BandAlbumRepository(BandAlbumContext context, IPropertyMappingService propertyMappingService)
{
_context = context ?? throw new ArgumentNullException(nameof(context));
_propertyMappingService = propertyMappingService;
}