I am stuck on figuring this out. MVC 5, EntityFramework
My project revolves around a Job. Every Job has multiple ChangeOrders. I have that setup fine. A Job has one Customer. That works fine as well. my problem is with the Customer Employees. The Customer class has a one-to-many relationship with the CustomerEmployee class. Every Customer Employee has a basic properties plus a Role property. Super,PM,Accountant, or Admin. Well when I create a job, I need to select a CustomerEmployee Admin/PM etc...
What relationship would this be? A many-to-many relationship? In my mind, the Job class would need to have a CustomerEmployeeSuperId, CustomerEmployeePMId, CustomerEmployeeAdminId and CustomerEmployeeAccountantId.
Because right now all it has is CustomerEmployeeId
How do I do this?
Current Setup
public class Job
{
//job
public int JobId { get; set; }
public int? JobNumber { get; set; }
public string JobName { get; set; }
public string JobDescription { get; set; }
public int? GeoAreaId { get; set; }
public virtual JobMisc.GeoArea GeoArea { get; set; }
public int? JobClassId { get; set; }
public virtual JobMisc.JobClass JobClass { get; set; }
public int? JobTypeId { get; set; }
public virtual JobMisc.JobType JobType { get; set; }
public Int64? CustomerId { get; set; }
public virtual Customer Customer { get; set; }
public virtual ICollection<ChangeOrder> ChangeOrders { get; set; }
public virtual ICollection<PurchaseOrder> PurchaseOrders { get; set; }
public int? CustomerEmployeeId { get; set; }
public virtual ICollection<CustomerEmployee> CustomerEmployees { get; set; }
}
public class Customer
{
[Key]
[DatabaseGeneratedAttribute(DatabaseGeneratedOption.None)]
public Int64 CustomerId { get; set; }
public string CustomerName { get; set; }
public Int64? CustomerPhoneNumber { get; set; }
public Int64? CustomerFaxNumber { get; set; }
public string CustomerAddress { get; set; }
public string CustomerCity { get; set; }
public string CustomerState { get; set; }
public int? CustomerZipcode { get; set; }
public string CustomerWebsite { get; set; }
public string CustomerOtherShit { get; set; }
public bool? CustomerIsHidden { get; set; }
public virtual ICollection<CustomerEmployee> CustomerEmployees { get; set; }
public List<Job> Jobs { get; set; }
}
public class CustomerEmployee
{
[Key]
public int CustomerEmployeeId { get; set; }
public string CustomerEmployeeFirstName { get; set; }
public string CustomerEmployeeLastName { get; set; }
public string CustomerEmployeeEmail { get; set; }
public Int64? CustomerEmployeePhoneNumber { get; set; }
public Int64? CustomerEmployeeCellNumber { get; set; }
public Int64? CustomerEmployeeFaxNumber { get; set; }
public bool? CustomerEmployeeIsHidden { get; set; }
public string CustomerEmployeeRole { get; set; }
public Int64? CustomerId { get; set; }
public virtual Customer Customer { get; set; }
public int? JobId { get; set; }
public virtual ICollection<Job> Jobs { get; set; }
}
Well, for the individual job, it would be a one to many relationship. For multiple jobs, it could be many to many.
Is it possible that an employee who is an Admin might also be pressed into service as a tester for certain jobs?
I'd recommend created a child table for JobRoles, one that links to the JobID, a CustomerEmployeeID, and a JobRoleID (assuming the possibility of the JobRoles being flexible).
Hope this helps...
Related
I am using EF Core db first approach, .NET6. I have the following classes:
public class Doctor
{
[Key]
public int DoctorId { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Specialization { get; set; }
public string Phone { get; set; }
public string Email { get; set; }
public string Designation { get; set; }
public bool IsDeleted { get; set; }
}
and
public class Patient
{
[Key]
public int PatientId { get; set; }
[Required]
public string FirstName { get; set; }
public string LastName { get; set; }
public string Email { get; set; }
public string NIC { get; set; }
public string Phone { get; set; }
public string Address { get; set; }
public string City { get; set; }
public string Country { get; set; }
public DateTime DOB { get; set; }
public string Gender { get; set; }
public string Reference { get; set; }
public short SerialNumberYear { get; set; }
public int SerialNumber { get; set; }
[Required]
public int DoctorId { get; set; } //need to assign Primary doc. Is this correct?
public Doctor Doctor { get; set; }
public DateTime CreatedOn { get; set; }
public DateTime UpdatedOn { get; set; }
public string CreatedBy { get; set; }
public List<Doctor> SecondaryDoctors { get; set; }//need to assign a list of secondary docs. is this correct?
public bool SMS_Allowed { get; set; }
public bool Email_Allowed { get; set; }
public string SpecialConcern1 { get; set; }
public string SpecialConcern2 { get; set; }
public string SpecialConcern3 { get; set; }
public string SpecialConcern4 { get; set; }
}
The Patient class needs to have a Primary doctor assigned and a list of Secondary doctors assigned. What entries should I make in the Patient class to accomodate this requirement? I tried the entries shown above with comments. Is that correct? When I add a patient with this code, I get the following error when creating a new patient record:
Duplicate entry '1' for key 'doctors.PRIMARY'
So when creating a patient, why is efcore trying to create a doctor record?
I am using Entity Framework. I have tried everything, searching and adding keys but Ienter image description here cannot understand what the problem is and how to resolve it.
public class Reservation
{
[Key]
public int BookingID { get; set; }
public int CustomerID { get; set; }
public int RoomID { get; set; }
public string BookingDate { get; set; }
public int Check_In { get; set; }
public int Check_Out { get; set; }
public int Adults { get; set; }
public int Children { get; set; }
public int NoOfNights { get; set; }
[ForeignKey("RoomID")]
public virtual Room Rooms { get; set; }
[ForeignKey("CustomerID")]
public virtual CustomerDetails CustomerDetail { get; set; }
public virtual ICollection<Payment> Payment { get; set; }
}
public class CustomerDetails
{
[Key]
public int CustomerID { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public int PostCode { get; set; }
public string State { get; set; }
public int PhoneNumber { get; set; }
public string Email { get; set; }
public string Password { get; set; }
public virtual ICollection<Reservation> Reservations { get; set; }
}
enter image description here
All tables need a primary key or you can't use Entity Framework.
public class Category
{
[Key]
public int CategoryId { get; set; }
public int ParentCategoryId { get; set; }
public string Name { get; set; }
public string Description { get; set; }
public int Status { get; set; }
public virtual ICollection<Category> ParentCategories { get; set; }
public virtual ICollection<ImageSet> ImageSets { get; set; }
[ForeignKey("ParentCategoryId")]
public virtual Category ParentCategory { get; set; }
}
public class ImageSet
{
[Key]
public int ImageSetId { get; set; }
public int CategoryId { get; set; }
public string Name { get; set; }
public string Description { get; set; }
public string InsertDate { get; set; }
public int Status { get; set; }
public virtual ICollection<Image> Images { get; set; }
[ForeignKey("CategoryId")]
public virtual Category Category { get; set; }
}
public class Image
{
[Key]
public int ImageId { get; set; }
public int ImageSetId { get; set; }
public string Name { get; set; }
public string Description { get; set; }
public string ImageUrl { get; set; }
public string ThumbImageUrl { get; set; }
public string InsertDate { get; set; }
public int Status { get; set; }
[ForeignKey("ImageSetId")]
public virtual ImageSet ImageSet { get; set; }
}
Context:
public DbSet<Category> Categories { get; set; }
public DbSet<Image> Images { get; set; }
public DbSet<ImageSet> ImageSets { get; set; }
error page:Introducing FOREIGN KEY constraint 'FK_dbo.ImageSets_dbo.Categories_CategoryId' on table 'ImageSets' may
cause cycles or multiple cascade paths. Specify ON DELETE NO ACTION or
ON UPDATE NO ACTION, or modify other FOREIGN KEY constraints. Could
not create constraint. See previous errors.
Whats the problem?
You need to add this:
modelBuilder.Entity<ImageSet>()
.HasRequired(is => is.Category)
.WithMany(c => c.ImageSets)
.WillCascadeOnDelete(false);
Here are good explanations of why this is happening :
https://stackoverflow.com/a/19390016/1845408
https://stackoverflow.com/a/17127512/1845408
I am getting the following error.
The INSERT statement conflicted with the FOREIGN KEY constraint "FK_dbo.NotificationObject_dbo.Comment_CommentReplyID". The conflict occurred in database "DB_f0f7b19b55c44199988352815f71b25c", table "dbo.Comment", column 'CommentID'.
I'm confused, because the NotificationObject table can have a wide variety of optional foreign keys, including a key to a comment, or a reply to a comment. When I try to add a row with a CommentReplyID, it gives the error above... about the comment table??? The key should point to the CommentReply table, so I'm pretty confused.
See the related models below.
public class NotificationObject
{
public int ID { get; set; }
public int NotificationTypeID { get; set; }
public int? CommentID { get; set; }
public int? CommentVoteID { get; set; }
public int? CommentReplyID { get; set; }
public int? CommentReplyVoteID { get; set; }
public int? UserID { get; set; }
public int? ActivityCommentID { get; set; }
public DateTime DateCreated { get; set; }
public virtual NotificationType NotificationType { get; set; }
public virtual Comment Comment { get; set; }
public virtual Comment CommentVote { get; set; }
public virtual Comment CommentReply { get; set; }
public virtual Comment CommentReplyVote { get; set; }
public virtual ActivityComment ActivityComment { get; set; }
public virtual ICollection<NotificationActor> NotificationActor { get; set; }
}
public class Comment
{
public int CommentID { get; set; }
public int ProjectDocID { get; set; }
public int UserID { get; set; }
public string text { get; set; }
public string quote { get; set; }
public DateTime DateCreated { get; set; }
public virtual ICollection<CommentVote> CommentVote { get; set; }
public virtual ICollection<CommentReply> CommentReply { get; set; }
public virtual ICollection<CommentReport> CommentReport { get; set; }
public virtual ProjectDoc ProjectDoc { get; set; }
public virtual User User { get; set; }
public virtual ICollection<ranges> ranges { get; set; }
}
Why wont it let me add a value to the CommentReplyID field in the NotificationObject table?
Your CommentReply navigation property in NotificationObject targets Comment type, not CommentReply type.
I get a common error that probably is easy to solve but I have no clue how. This is the message I get.
The column name is not valid. [ Node name (if any) = Extent1,Column name = Blog_BlogId ]
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.SqlServerCe.SqlCeException: The column name is not valid. [ Node name (if any) = Extent1,Column name = Blog_BlogId ]
This is my classes representing my entities:
public class BlogContext : DbContext
{
public BlogContext()
: base("SqlCeServices")
{
}
public DbSet<User> Users { get; set; }
public DbSet<Blog> Blogs { get; set; }
public DbSet<Post> Posts { get; set; }
public DbSet<Category> Categories { get; set; }
public DbSet<Tag> Tags { get; set; }
}
[Table("aspnet_Users")]
public class User
{
[Required]
public Guid ApplicationId { get; set; }
[Required]
public Guid UserId { get; set; }
[Required]
public string UserName { get; set; }
[Required]
public string LoweredUserName { get; set; }
public string MobileAlias { get; set; }
[Required]
public bool IsAnonymous { get; set; }
[Required]
public DateTime LastActivityDate { get; set; }
}
public class Blog
{
[Key]
public int BlogId { get; set; }
[Required]
public string Name { get; set; }
public string Url { get; set; }
public int Rating { get; set; }
public virtual ICollection<User> Editors { get; set; }
public virtual ICollection<Post> Posts { get; set; }
}
public class Post
{
[Key]
public int PostId { get; set; }
[Required, MaxLength(200)]
public string Title { get; set; }
public string Content { get; set; }
public string Abstract { get; set; }
public DateTime DateCreated { get; set; }
public DateTime DateLastEdited { get; set; }
public virtual User UserId { get; set; }
public virtual ICollection<Category> Categories { get; set; }
public virtual ICollection<Tag> Tags { get; set; }
public virtual Blog BlogId { get; set; }
}
public class Category
{
[Key]
public int CategoryId { get; set; }
[Required, MaxLength(200)]
public string Title { get; set; }
public string Description { get; set; }
public virtual ICollection<Post> Posts { get; set; }
public virtual Category ParentCategory { get; set; }
public virtual Blog BlogId { get; set; }
}
public class Tag
{
[Key]
public int TagId { get; set; }
[Required, MaxLength(200)]
public string Title { get; set; }
public virtual Blog BlogId { get; set; }
}
Consider changing your Post class so that BlogId references the FK to the associated Blog instead of the Blog object itself. Add a new property Blog to reference the actual Blog object.
public class Post
{
[Key]
public int PostId { get; set; }
[Required, MaxLength(200)]
public string Title { get; set; }
public string Content { get; set; }
public string Abstract { get; set; }
public DateTime DateCreated { get; set; }
public DateTime DateLastEdited { get; set; }
public virtual User UserId { get; set; }
public virtual ICollection<Category> Categories { get; set; }
public virtual ICollection<Tag> Tags { get; set; }
public virtual int BlogId { get; set; }
public virtual Blog Blog { get; set; }
}
You can try...ForeignKey annotation
public virtual int BlogId { get; set; }
[ForeignKey("BlogId ")]
public virtual Blog Blog { get; set; }
Detach the connection from DB, Delete any App Data related to application and rebuild and try again, It worked for me.