delete grade entity

Tsi1.Api/Tsi1.BusinessLayer/Dtos/GradeDto.cs

-using System;
-using System.Collections.Generic;
-using System.Text;
-using System.Text.Json.Serialization;
-
-namespace Tsi1.BusinessLayer.Dtos
-{
-    public class GradeDto
-    {
-        public int ActivityId { get; set; }
-
-        public int UserId { get; set; }
-
-        public decimal Value { get; set; }
-    }
-}

Tsi1.Api/Tsi1.DataLayer/Entities/Grade.cs

-using System;
-using System.Collections.Generic;
-using System.Text;
-
-namespace Tsi1.DataLayer.Entities
-{
-    public class Grade
-    {
-        public int ActivityId { get; set; }
-
-        public int StudentId { get; set; }
-
-        public decimal Value { get; set; }
-
-        public DateTime Date { get; set; }
-
-        public Student Student { get; set; }
-
-        public Activity Activity { get; set; }
-    }
-}

Tsi1.Api/Tsi1.DataLayer/EntityConfiguration/GradeConfiguration.cs

-using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.Metadata.Builders;
-using System;
-using System.Collections.Generic;
-using System.Text;
-using Tsi1.DataLayer.Entities;
-
-namespace Tsi1.DataLayer.EntityConfiguration
-{
-    public class GradeConfiguration : IEntityTypeConfiguration<Grade>
-    {
-        public void Configure(EntityTypeBuilder<Grade> builder)
-        {
-            builder.HasKey(x => new { x.ActivityId, x.StudentId});
-
-            builder.Property(x => x.Value)
-                .IsRequired()
-                .HasColumnType("NUMERIC(5,2)");
-
-            builder.HasOne(x => x.Activity)
-                .WithMany(x => x.Grades)
-                .HasForeignKey(x => x.ActivityId);
-
-            builder.HasOne(x => x.Student)
-                .WithMany(x => x.Grades)
-                .HasForeignKey(x => x.StudentId);
-        }
-    }
-}