Blog

Mert Özen's blog posts on software development, backend, frontend, and DevOps.

Series

.NET Core Web API 36 Angular 31 JavaScript Basics 19 JavaScript Intermediate 18 JavaScript Advanced 16 TypeScript Basics 14 TypeScript Intermediate 14 TypeScript Advanced 12 Entity Framework Core 28

2 posts found #seeding

Newest Oldest Popular

Database PART 27

What's New in EF Core 9: UseSeeding, Migration Locking and PendingModelChangesWarning

PendingModelChangesWarning catching a missing migration at Migrate time, the HasData and DateTime.Now trap, UseSeeding/UseAsyncSeeding, migration locking with __EFMigrationsLock, auto-discovered compiled models and EFOptimizeContext, and ExecuteUpdate with complex types in EF Core 9.

5 Nov 2026 9 min 2

Database PART 08

Seeding in EF Core: Model Seeding with HasData and Application-Side Seeding

Two ways to add initial data in EF Core: model seeding with HasData and the InsertData/UpdateData/DeleteData it generates, the key and navigation rules, the dynamic value trap; then a rerunnable application-side seeder and a pointer to EF Core 9's UseSeeding.

5 Nov 2026 12 min 2