struct&&assiQues

Entities/Contracts/Textbook/Lesson.cs

@@ -0,0 +1,48 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Entities.Contracts
+{
+	[Table("lesson")]
+	public class Lesson
+	{
+		[Key]
+		public Guid Id { get; set; }
+
+		[StringLength(255)]
+		public string Title { get; set; } = string.Empty;
+
+		public string Description { get; set; } = string.Empty;
+
+		[Required]
+		public Guid TextbookID { get; set; }
+
+
+		[ForeignKey(nameof(TextbookID))]
+		public Textbook Textbook { get; set; }
+
+		[InverseProperty(nameof(KeyPoint.Lesson))]
+		public ICollection<KeyPoint>? KeyPoints { get; set; }
+
+		[InverseProperty(nameof(Question.Lesson))]
+		public ICollection<Question>? Questions { get; set; }
+
+		[InverseProperty(nameof(LessonQuestion.Lesson))]
+		public ICollection<LessonQuestion>? LessonQuestions { get; set; } 
+
+
+
+		public Lesson()
+		{
+			Id = Guid.NewGuid();
+			KeyPoints = new HashSet<KeyPoint>();
+			Questions = new HashSet<Question>();	
+			LessonQuestions = new HashSet<LessonQuestion>();	
+		}
+	}
+}