D1 05 Entity Migration

Day 1 · Step 5 — Entity + migration (no redeploy)

Before starting: Ask for:

1. Entity name (PascalCase, e.g., Product, Order, User) — REQUIRED
2. Columns (format: ColumnName:Type, comma-separated, e.g., Name:string, Price:decimal, Stock:int) — REQUIRED
3. Nullable columns (optional, default: all non-string/Id are non-nullable) — OPTIONAL

Use exactly as specified. Do not suggest, add, or modify columns.

up-api/Entities/<Entity>.cs:

public class <Entity>
{
    public int Id { get; set; }
    // one property per given column, e.g.:
    // public string Name { get; set; } = string.Empty;
    // public decimal Price { get; set; }
}

Add to AppDbContext:

public DbSet<<Entity>> <Entity>s => Set<<Entity>>();

cd up-api
dotnet ef migrations add Init<Entity>
dotnet ef database update

This runs against the already-running Postgres container via the localhost:5432 connection string from the db-config step — no redeploy needed. Verify the table exists (\dt in psql, or a quick docker exec into the db container).