diff --git a/Blog/Data/Mappings/PostMap.cs b/Blog/Data/Mappings/PostMap.cs
index 2089d30..08acd75 100644
--- a/Blog/Data/Mappings/PostMap.cs
+++ b/Blog/Data/Mappings/PostMap.cs
@@ -50,5 +50,16 @@ public void Configure(EntityTypeBuilder<Post> builder)
 
         builder.HasIndex(it => it.Slug, "IX_Post_Slug")
             .IsUnique();
+
+        // Relacionamentos
+        builder.HasOne(it => it.Author)
+            .WithMany(it => it.Posts)
+            .HasConstraintName("FK_Post_Author")
+            .OnDelete(DeleteBehavior.Cascade);
+
+        builder.HasOne(it => it.Category)
+            .WithMany(it => it.Posts)
+            .HasConstraintName("FK_Post_Category")
+            .OnDelete(DeleteBehavior.Cascade);
     }
 }
diff --git a/Blog/Models/Category.cs b/Blog/Models/Category.cs
index 2bfbe32..7888a8e 100644
--- a/Blog/Models/Category.cs
+++ b/Blog/Models/Category.cs
@@ -2,6 +2,8 @@ namespace Blog.Models;
 
 public class Category : ModelBase
 {
+    public IList<Post> Posts { get; set; } = new List<Post>();
+
     public string Slug { get; set; } = string.Empty;
 
     public string Title { get; set; } = string.Empty;
diff --git a/Blog/Models/User.cs b/Blog/Models/User.cs
index 07f4037..c2b710d 100644
--- a/Blog/Models/User.cs
+++ b/Blog/Models/User.cs
@@ -12,5 +12,7 @@ public class User : ModelBase
 
     public string PasswordHash { get; set; } = string.Empty;
 
+    public IList<Post> Posts { get; set; } = new List<Post>();
+
     public string Slug { get; set; } = string.Empty;
 }