Initial commit

MealPlan.Api/Data/AppDbContext.cs

@@ -0,0 +1,65 @@
+using MealPlan.Api.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace MealPlan.Api.Data;
+
+/// <summary>
+/// Database-first context for the existing PostgreSQL database.
+/// Tables are mapped explicitly; this context never creates or alters schema.
+/// </summary>
+public class AppDbContext : DbContext
+{
+    public AppDbContext(DbContextOptions<AppDbContext> options) : base(options)
+    {
+    }
+
+    public DbSet<Recipe> Recipes => Set<Recipe>();
+    public DbSet<Ingredient> Ingredients => Set<Ingredient>();
+    public DbSet<RecipeStep> RecipeSteps => Set<RecipeStep>();
+    public DbSet<ApplicationUser> Users => Set<ApplicationUser>();
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        base.OnModelCreating(modelBuilder);
+        
+        modelBuilder.HasDefaultSchema("diet");
+
+        modelBuilder.Entity<Recipe>(e =>
+        {
+            e.HasKey(r => r.Id);
+            e.Property(r => r.Id).UseIdentityByDefaultColumn();
+            e.Property(r => r.Protein).HasColumnType("numeric(6,2)");
+            e.Property(r => r.Fat).HasColumnType("numeric(6,2)");
+            e.Property(r => r.Carbs).HasColumnType("numeric(6,2)");
+
+            e.HasMany(r => r.Ingredients)
+                .WithOne(i => i.Recipe!)
+                .HasForeignKey(i => i.RecipeId)
+                .OnDelete(DeleteBehavior.Cascade);
+
+            e.HasMany(r => r.Steps)
+                .WithOne(s => s.Recipe!)
+                .HasForeignKey(s => s.RecipeId)
+                .OnDelete(DeleteBehavior.Cascade);
+        });
+
+        modelBuilder.Entity<Ingredient>(e =>
+        {
+            e.HasKey(i => i.Id);
+            e.Property(i => i.Id).UseIdentityByDefaultColumn();
+            e.Property(i => i.AmountGrams).HasColumnType("numeric(8,2)");
+        });
+
+        modelBuilder.Entity<RecipeStep>(e =>
+        {
+            e.HasKey(s => s.Id);
+            e.Property(s => s.Id).UseIdentityByDefaultColumn();
+        });
+
+        modelBuilder.Entity<ApplicationUser>(e =>
+        {
+            e.HasKey(u => u.Id);
+            e.Property(u => u.Id).HasColumnType("uuid");
+        });
+    }
+}