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Data/AppDbContext.cs

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+using Microsoft.EntityFrameworkCore;
+using SimpleWiki.Models;
+
+namespace SimpleWiki.Data;
+
+public class AppDbContext : DbContext
+{
+    public AppDbContext()
+    {
+    }
+
+    public AppDbContext(DbContextOptions<AppDbContext> options) : base(options)
+    {
+    }
+
+    public DbSet<User> Users => Set<User>();
+    public DbSet<Article> Articles => Set<Article>();
+
+    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+    {
+        if (!optionsBuilder.IsConfigured)
+        {
+            optionsBuilder.UseSqlite("Data Source=simplewiki.db");
+        }
+    }
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        modelBuilder.Entity<User>(entity =>
+        {
+            entity.ToTable("users");
+
+            entity.HasKey(x => x.Id);
+            entity.Property(x => x.Id)
+                .ValueGeneratedOnAdd();
+
+            entity.Property(x => x.FullName)
+                .IsRequired()
+                .HasMaxLength(100);
+
+            entity.Property(x => x.Email)
+                .IsRequired()
+                .HasMaxLength(256);
+
+            entity.Property(x => x.PasswordHash)
+                .IsRequired()
+                .HasMaxLength(512);
+
+            entity.Property(x => x.Role)
+                .IsRequired()
+                .HasMaxLength(16);
+
+            entity.Property(x => x.CreatedAt)
+                .IsRequired();
+
+            entity.HasIndex(x => x.Email)
+                .IsUnique();
+
+            entity.HasMany(x => x.Articles)
+                .WithOne(x => x.Author)
+                .HasForeignKey(x => x.AuthorId)
+                .OnDelete(DeleteBehavior.Restrict);
+        });
+
+        modelBuilder.Entity<Article>(entity =>
+        {
+            entity.ToTable("articles");
+
+            entity.HasKey(x => x.Id);
+            entity.Property(x => x.Id)
+                .ValueGeneratedOnAdd();
+
+            entity.Property(x => x.Title)
+                .IsRequired()
+                .HasMaxLength(150);
+
+            entity.Property(x => x.Slug)
+                .IsRequired()
+                .HasMaxLength(180);
+
+            entity.Property(x => x.Summary)
+                .IsRequired()
+                .HasMaxLength(400);
+
+            entity.Property(x => x.MarkdownContent)
+                .IsRequired()
+                .HasMaxLength(20000);
+
+            entity.Property(x => x.CreatedAt)
+                .IsRequired();
+
+            entity.Property(x => x.UpdatedAt)
+                .IsRequired(false);
+
+            entity.HasIndex(x => x.Slug)
+                .IsUnique();
+
+            entity.HasIndex(x => x.Title);
+        });
+
+        base.OnModelCreating(modelBuilder);
+    }
+}