+ name value object

3_Name_value_object.sql

@@ -0,0 +1,17 @@
+USE [EFCoreDDD]
+GO
+BEGIN TRANSACTION
+GO
+EXECUTE sp_rename N'dbo.Student.Name', N'Tmp_FirstName', 'COLUMN' 
+GO
+EXECUTE sp_rename N'dbo.Student.Tmp_FirstName', N'FirstName', 'COLUMN' 
+GO
+ALTER TABLE dbo.Student ADD
+	LastName nvarchar(50) NOT NULL CONSTRAINT DF_Student_LastName DEFAULT ''
+GO
+ALTER TABLE dbo.Student
+	DROP CONSTRAINT DF_Student_LastName
+GO
+ALTER TABLE dbo.Student SET (LOCK_ESCALATION = TABLE)
+GO
+COMMIT

DddAndEFCore.sln

@@ -10,6 +10,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		.editorconfig = .editorconfig
 		1_Database_initial.sql = 1_Database_initial.sql
 		2_Enrollments.sql = 2_Enrollments.sql
+		3_Name_value_object.sql = 3_Name_value_object.sql
 		README.md = README.md
 	EndProjectSection
 EndProject

src/App/Name.cs

@@ -0,0 +1,46 @@
+using System.Collections.Generic;
+using CSharpFunctionalExtensions;
+
+namespace App
+{
+    public class Name : ValueObject
+    {
+        public string First { get; }
+        public string Last { get; }
+
+        protected Name()
+        {
+        }
+
+        private Name(string first, string last)
+            : this()
+        {
+            First = first;
+            Last = last;
+        }
+
+        public static Result<Name> Create(string firstName, string lastName)
+        {
+            if (string.IsNullOrWhiteSpace(firstName))
+                return Result.Failure<Name>("First name should not be empty");
+            if (string.IsNullOrWhiteSpace(lastName))
+                return Result.Failure<Name>("Last name should not be empty");
+
+            firstName = firstName.Trim();
+            lastName = lastName.Trim();
+
+            if (firstName.Length > 200)
+                return Result.Failure<Name>("First name is too long");
+            if (lastName.Length > 200)
+                return Result.Failure<Name>("Last name is too long");
+
+            return Result.Success(new Name(firstName, lastName));
+        }
+
+        protected override IEnumerable<object> GetEqualityComponents()
+        {
+            yield return First;
+            yield return Last;
+        }
+    }
+}

src/App/SchoolContext.cs

@@ -49,7 +49,11 @@ protected override void OnModelCreating(ModelBuilder modelBuilder)
                 x.Property(p => p.Id).HasColumnName("StudentID");
                 x.Property(p => p.Email)
                     .HasConversion(p => p.Value, p => Email.Create(p).Value);
-                x.Property(p => p.Name);
+                x.OwnsOne(p => p.Name, p =>
+                {
+                    p.Property(pp => pp.First).HasColumnName("FirstName");
+                    p.Property(pp => pp.Last).HasColumnName("LastName");
+                });
                 x.HasOne(p => p.FavoriteCourse).WithMany();
                 x.HasMany(p => p.Enrollments).WithOne(p => p.Student)
                     .OnDelete(DeleteBehavior.Cascade)

src/App/Student.cs

@@ -5,7 +5,7 @@ namespace App
 {
     public class Student : Entity
     {
-        public string Name { get; set; }
+        public virtual Name Name { get; set; }
         public Email Email { get; set; }
         public virtual Course FavoriteCourse { get; set; }
 
@@ -17,7 +17,7 @@ protected Student()
         }
 
         public Student(
-            string name, Email email, Course favoriteCourse, Grade favoriteCourseGrade)
+            Name name, Email email, Course favoriteCourse, Grade favoriteCourseGrade)
             : this()
         {
             Name = name;

src/App/StudentController.cs

@@ -74,8 +74,8 @@ public string RegisterStudent(
             if (result.IsFailure)
                 return result.Error;
 
-            var student = new Student(name, result.Value, favoriteCourse, favoriteCourseGrade);
-            _repository.Save(student);
+            //var student = new Student(name, result.Value, favoriteCourse, favoriteCourseGrade);
+            //_repository.Save(student);
 
             _context.SaveChanges();
 
@@ -97,7 +97,7 @@ public string EditPersonalInfo(
             if (result.IsFailure)
                 return result.Error;
 
-            student.Name = name;
+            //student.Name = name;
             student.Email = result.Value;
             student.FavoriteCourse = favoriteCourse;