Entity Framework Core Interview Question #175

What are best practices for advanced EF Core mapping and architecture?

Advanced Mapping, Interceptors, Value Conversions & Architecture Senior Advanced

Quick Interview Answer

Use advanced mapping features only when they solve a concrete domain or database problem. Prefer clear conventional models when possible, and document global filters, converters, interceptors, inheritance strategies, and unusual mappings because they affect behavior outside the immediate code location.

Detailed Explanation

Use advanced mapping features only when they solve a concrete domain or database problem. Prefer clear conventional models when possible, and document global filters, converters, interceptors, inheritance strategies, and unusual mappings because they affect behavior outside the immediate code location.

Keep domain invariants explicit, use value objects where they add meaning, and avoid infrastructure abstractions that merely duplicate EF Core. Test tenant isolation, soft deletion, conversions, concurrency, and interceptor behavior. Finally, inspect migrations and generated SQL so sophisticated object models still produce safe and efficient database behavior.

Code Example

// Favor purposeful configuration:
modelBuilder.ApplyConfigurationsFromAssembly(
    typeof(AppDbContext).Assembly);

// Keep mapping classes small, explicit, and testable.