068 Entity with two ForeignKeys : Phone - chempkovsky/CS82ANGULAR GitHub Wiki
According to the rules defined in the article 006 Development Process Cycle
We can continue with any entity from the list: Phone
Let's continue with PhbkPhone
- Step #1:
- Run Visual Studio and Open
PhonebookSolution
- solution- Right Click
PhBk
of thePhBkEntity
-project - Select
Add/Class
-menu item - In the dialog enter the name for the class
- PhbkPhone
- Click
Add
-button
- Right Click
- Run Visual Studio and Open
- Step #2:
- Open
PhbkPhone.cs
-file and modify the body of the class as it is shown on the slide
- Open
Click to show the PhbkPhone.cs file
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
namespace PhBkEntity.PhBk
{
public class PhbkPhone
{
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
[Display(Description = "Row id", Name = "Phone Id", Prompt = "Enter Phone Id", ShortName = "Phone Id")]
[Required]
public int PhoneId { get; set; }
[StringLength(20, MinimumLength = 3, ErrorMessage = "Invalid")]
[Display(Description = "Name of the Phone Type", Name = "Phone", Prompt = "Enter Phone", ShortName = "Phone")]
[Required]
public string Phone { get; set; } = null!;
[Display(Description = "Row id", Name = "Phone Type Id", Prompt = "Enter Phone Type Id", ShortName = "Phone Type Id")]
[Required]
public int PhoneTypeIdRef { get; set; }
public PhbkPhoneType PhoneType { get; set; } = null!;
[Display(Description = "Row id", Name = "Id of the Employee", Prompt = "Enter Employee Id", ShortName = "Employee Id")]
[Required]
public int EmployeeIdRef { get; set; }
public PhbkEmployee Employee { get; set; } = null!;
}
}
-
PhbkPhone
refers toPhbkEmployee
as the master entity. - to complete description of the Foreign Key
PhbkEmployee
needs to be modified as it is shown below:
Click to show the PhbkEmployee.cs file
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
namespace PhBkEntity.PhBk
{
public class PhbkEmployee
{
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
[Display(Description = "Row id", Name = "Id of the Employee", Prompt = "Enter Employee Id", ShortName = "Employee Id")]
[Required]
public int EmployeeId { get; set; }
[Display(Description = "First Name of the Employee", Name = "Employee First Name", Prompt = "Enter Employee First Name", ShortName = "First Name")]
[StringLength(25, MinimumLength = 3, ErrorMessage = "Invalid")]
[Required]
public string EmpFirstName { get; set; } = null!;
[Display(Description = "Last Name of the Employee", Name = "Employee Last Name", Prompt = "Enter Employee Last Name", ShortName = "Last Name")]
[StringLength(40, MinimumLength = 3, ErrorMessage = "Invalid")]
[Required]
public string EmpLastName { get; set; } = null!;
[Display(Description = "Row id", Name = "Employee Second Name", Prompt = "Enter Employee Second Name", ShortName = "Second Name")]
[StringLength(25, ErrorMessage = "Invalid")]
public string? EmpSecondName { get; set; }
[Display(Description = "Row id", Name = "Id of the Division", Prompt = "Enter Division Id", ShortName = "Division Id")]
[Required]
public int DivisionIdRef { get; set; }
public PhbkDivision Division { get; set; } = null!;
public List<PhbkPhone> Phones { get; set; } = null!;
#if (!NOTMODELING)
public List<LprEmployee01> EmployeeRefs01 { get; set; } = null!;
public List<LprEmployee02> EmployeeRefs02 { get; set; } = null!;
#endif
}
}
-
PhbkPhone
refers toPhbkPhoneType
as the master entity. - to complete description of the Foreign Key
PhbkPhoneType
needs to be modified as it is shown below:
Click to show the PhbkPhoneType.cs file
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
namespace PhBkEntity.PhBk
{
public class PhbkPhoneType
{
[DatabaseGenerated(DatabaseGeneratedOption.None)]
[Display(Description = "Row id", Name = "Phone Type Id", Prompt = "Enter Phone Type Id", ShortName = "Phone Type Id")]
[Required]
public int PhoneTypeId { get; set; }
[StringLength(20, MinimumLength = 3, ErrorMessage = "Invalid")]
[Display(Description = "Name of the Phone Type", Name = "Phone Type Name", Prompt = "Enter Phone Type Name", ShortName = "Phone Type Name")]
[Required]
public string PhoneTypeName { get; set; } = null!;
[Display(Description = "Description of the Phone Type", Name = "Phone Type Description", Prompt = "Enter Phone Type Description", ShortName = "Phone Type Description")]
[StringLength(250, ErrorMessage = "Invalid")]
public string? PhoneTypeDesc { get; set; }
public List<PhbkPhone> Phones { get; set; } = null!;
}
}