Correcting all type and relations in all entities

PyroFetes/Models/Availability.cs

@@ -5,8 +5,10 @@ namespace PyroFetes.Models;
 public class Availability
 {
     [Key] public int Id { get; set; }
-    [Required] public string? AvailabilityDate { get; set; }
+    [Required] public DateOnly AvailabilityDate { get; set; }
     [Required] public DateOnly DeliveryDate { get; set; }
     [Required] public DateOnly ExpirationDate { get; set; }
     [Required] public DateOnly RenewallDate { get; set; }
+    
+    public List<StaffAvailability>? StaffAvailabilities { get; set; }
 }

PyroFetes/Models/Contact.cs

@@ -18,4 +18,5 @@ public class Contact
     [Required] public int CustomerId { get; set; }
     
     public List<Communication>? Communications { get; set; }
+    public List<StaffContact>? StaffContacts { get; set; }
 }

PyroFetes/Models/CustomerType.cs

@@ -5,7 +5,7 @@ namespace PyroFetes.Models;
 public class CustomerType
 {
     [Key]  public int Id { get; set; }
-    [Required] public decimal Price { get; set; }
+    [Required, MaxLength(100)] public string? Label { get; set; }
     
     public List<Customer>? Customers { get; set; }
 }

PyroFetes/Models/ExperienceLevel.cs

@@ -5,5 +5,8 @@ namespace PyroFetes.Models;
 public class ExperienceLevel
 {
     [Key] public int Id { get; set; }
-    [Required] public string? Label { get; set; }
+    [Required, MaxLength(100)] public string? Label { get; set; }
+    
+    public Staff? Staff { get; set; }
+    [Required] public int StaffId { get; set; }
 }

PyroFetes/Models/HistoryOfApproval.cs

@@ -5,6 +5,8 @@ namespace PyroFetes.Models;
 public class HistoryOfApproval
 {
     [Key]    public int Id { get; set; }
-    [Required] public DateOnly ExpirationDate { get; set; }
     [Required] public DateOnly DeliveryDate { get; set; }
+    [Required] public DateOnly ExpirationDate { get; set; }
+    
+    public List<StaffHistoryOfApproval>? StaffHistoryOfApprovals { get; set; }
 }

PyroFetes/Models/ProviderType.cs

@@ -5,5 +5,7 @@ namespace PyroFetes.Models;
 public class ProviderType
 {
     [Key]   public int Id { get; set; }
-    [Required] public string? Label { get; set; }
+    [Required, MaxLength(100)] public string? Label { get; set; }
+    
+    public List<ServiceProvider>? ServiceProviders { get; set; }
 }

PyroFetes/Models/ServiceProvider.cs

@@ -8,6 +8,6 @@ public class ServiceProvider
     [Required] public decimal Price { get; set; }
     
     //Relations
-    public int ProviderTypeId { get; set; }
+    [Required] public int ProviderTypeId { get; set; }
     public ProviderType? ProviderType { get; set; }
 }

PyroFetes/Models/Staff.cs

@@ -13,4 +13,8 @@ public class Staff
     [Required] public DateOnly F4T2ExpirationDate { get; set; }
     
     public List<ShowStaff>? ShowStaffs { get; set; }
+    public List<ExperienceLevel>? ExperienceLevels { get; set; }
+    public List<StaffAvailability>? StaffAvailabilities { get; set; }
+    public List<StaffHistoryOfApproval>? StaffHistoryOfApprovals { get; set; }
+    public List<StaffContact>? StaffContacts { get; set; }
 }

PyroFetes/Models/StaffContact.cs

@@ -1,3 +1,4 @@
+using System.ComponentModel.DataAnnotations;
 using Microsoft.EntityFrameworkCore;
 
 namespace PyroFetes.Models;
@@ -5,8 +6,8 @@ namespace PyroFetes.Models;
 [PrimaryKey(nameof(ContactId), nameof(StaffId))]
 public class StaffContact
 {
-    public int StaffId { get; set; }
+    [Required] public int StaffId { get; set; }
     public Staff? Staff { get; set; }
-    public int ContactId { get; set; }
+    [Required] public int ContactId { get; set; }
     public Contact? Contact { get; set; }
 }