Add EF Core, Npgsql, Todo entity, and AppDbContext

backend/Data/AppDbContext.cs

@@ -0,0 +1,25 @@
+using Backend.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace Backend.Data;
+
+public class AppDbContext(DbContextOptions<AppDbContext> options) : DbContext(options)
+{
+    public DbSet<Todo> Todos => Set<Todo>();
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        modelBuilder.Entity<Todo>(e =>
+        {
+            e.ToTable("todos", schema: "public");
+            e.HasKey(x => x.Id);
+            e.Property(x => x.Id).HasColumnName("id").ValueGeneratedOnAdd();
+            e.Property(x => x.UserId).HasColumnName("user_id").IsRequired();
+            e.Property(x => x.Title).HasColumnName("title").IsRequired().HasMaxLength(500);
+            e.Property(x => x.Completed).HasColumnName("completed").IsRequired();
+            e.Property(x => x.CreatedAt).HasColumnName("created_at").IsRequired();
+            e.HasIndex(x => new { x.UserId, x.CreatedAt })
+                .HasDatabaseName("todos_user_id_created_at_idx");
+        });
+    }
+}

backend/Models/Todo.cs

@@ -0,0 +1,10 @@
+namespace Backend.Models;
+
+public class Todo
+{
+    public long Id { get; set; }
+    public Guid UserId { get; set; }
+    public string Title { get; set; } = string.Empty;
+    public bool Completed { get; set; }
+    public DateTimeOffset CreatedAt { get; set; }
+}

backend/Program.cs

@@ -1,20 +1,22 @@
+using Backend.Data;
+using Microsoft.EntityFrameworkCore;
+
 var builder = WebApplication.CreateBuilder(args);
 
-// Add services to the container.
+builder.Services.AddDbContext<AppDbContext>(options =>
+    options.UseNpgsql(builder.Configuration.GetConnectionString("Postgres")));
+
+// MARKER: CORS SERVICES
+
+// MARKER: AUTH SERVICES
 
 builder.Services.AddControllers();
-// Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
-builder.Services.AddOpenApi();
 
 var app = builder.Build();
 
-// Configure the HTTP request pipeline.
-if (app.Environment.IsDevelopment())
-{
-    app.MapOpenApi();
-}
+// MARKER: CORS MIDDLEWARE
 
-app.UseAuthorization();
+// MARKER: AUTH MIDDLEWARE
 
 app.MapControllers();
 

backend/backend.csproj

@@ -8,6 +8,8 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.19" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.19" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.4" />
   </ItemGroup>
 
 </Project>