First table in database

GerbilManagerWebAPI/Models/Breeder.cs

@@ -1,8 +1,11 @@
+using System.ComponentModel.DataAnnotations;
+
 namespace GerbilManagerWebAPI.Models
 {
     public record Breeder
     {
+        [Key]
         public Guid Id { get; init; }
-        public string Name { get; init; }
+        public string? Name { get; init; }
     }
 }

GerbilManagerWebAPI/Models/Gerbil.cs

@@ -1,11 +1,14 @@
+using System.ComponentModel.DataAnnotations;
+
 namespace GerbilManagerWebAPI.Models
 {
     public record Gerbil
     {
+        [Key]
         public Guid Id { get; init; }
-        public string Name { get; init; }
+        public required string Name { get; init; }
         public Gender Gender { get; init; }
-        public Litter Litter { get; init; }
-        public Breeder Breeder { get; init; }
+        public Litter? Litter { get; set; }
+        public Breeder? Breeder { get; set; }
     }
 }

GerbilManagerWebAPI/Models/Litter.cs

@@ -1,13 +1,16 @@
+using System.ComponentModel.DataAnnotations;
+
 namespace GerbilManagerWebAPI.Models
 {
     public record Litter
     {
+        [Key]
         public Guid Id { get; init; }
-        public string Name { get; init; }
+        public string? Name { get; init; }
         public DateTime Date { get; init; }
         public int Strength { get; init; }
-        public Gerbil Father { get; init; }
-        public Gerbil Mother { get; init; }
+        public Gerbil? Father { get; init; }
+        public Gerbil? Mother { get; init; }
     }
 }