I am using AspNetIdentity and I have a non primary key column that is an identity auto increment.
[TableName("AspNetUsers")]
[PrimaryKey("Id", autoIncrement = false)]
public class Coach
{
public string Id { get; set; }
public string Email { get; set; }
public string UserName { get; set; }
public bool Active { get; set; }
public bool Admin { get; set; }
public int CoachId { get; set; }
}
How can I change my class definition to set CoachId to autoIncrement is false without it being the primary key? I'm using db.Save to save the object.
I just ended up executing a query!
var query = String.Format("UPDATE AspNetUsers SET Active = '{0}' WHERE Id='{1}'",activeStatus,id);
Related
I have a table called DeliveryRequest and another table called Operator, table DeliveryRequest is as follows:
public class DeliveryRequest
{
public int ID { get; set; }
public DateTime Date { get; set; }
public string UserID { get; set; }
public string Waybill { get; set; }
public string Reference { get; set; }
public int SupplierID { get; set; }
public Supplier Supplier { get; set; }
//[ForeignKey("Operator")]
public int SenderID { get; set; }
public Operator Sender { get; set; }
//[ForeignKey("Operator")]
public int ReceiverID { get; set; }
public Operator Receiver { get; set; }
public string Origin { get; set; }
public string Destination { get; set; }
public int ServiceID { get; set; }
public Service Service { get; set; }
}
And table Operator is as follows:
public class Operator
{
public int ID { get; set; }
public string Company { get; set; }
public int ContactID { get; set; }
public Contact Contact { get; set; }
public int AddressID { get; set; }
public Address Address { get; set; }
}
So the problem is, when I am trying to update my database I get a FK Constraint error as follows:
Introducing FOREIGN KEY constraint
'FK_dbo.DeliveryRequests_dbo.Operators_SenderID' on table
'DeliveryRequests' 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 or index. See previous errors.
And the previous error is the same. As follows:
System.Data.SqlClient.SqlException (0x80131904): Introducing FOREIGN
KEY constraint 'FK_dbo.DeliveryRequests_dbo.Operators_SenderID' on
table 'DeliveryRequests' may cause cycles or multiple cascade paths.
Specify ON DELETE NO ACTION or ON UPDATE NO ACTION, or modify other
FOREIGN KEY constraints.
Focus on the Sender and Receiver part, I am no expert but the error must be there lol
//[ForeignKey("Operator")]
public int SenderID { get; set; }
public Operator Sender { get; set; }
//[ForeignKey("Operator")]
public int ReceiverID { get; set; }
public Operator Receiver { get; set; }
It looks like you are using Code First approach. So try to turn off CascadeDelete for DeliveryRequests:
modelBuilder.Entity<DeliveryRequests>()
.HasRequired(c => c.Operator )
.WithMany()
.WillCascadeOnDelete(false);
For example:
public class YourDBContext: DbContext
{
public YourDBContext(): base()
{
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<DeliveryRequests>()
.HasRequired(c => c.Operator )
.WithMany()
.WillCascadeOnDelete(false);
}
}
I am trying to relate my Tables with ForeignKey and PrimaryKey on the other end. But now i will be using a ForeignKey which is not the primary for the said table. I was using [InverseProperty] but i think there's a bug with it since i've been looking around for hours already and all of them says the same thing about it.
Documents Table:
public class Document
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int DocumentId { get; set; }
public int ProjectId { get; set; }
public int DepartmentId { get; set; }
public int AuthorId { get; set; }
[NotMapped]
public virtual User Author { get; set; }
}
Users
public class User
{
[Key]
public int UserId { get; set; }
public int AuthUserId { get; set; }
public string DisplayName { get; set; }
[NotMapped]
[ForeignKey("AuthorId")]
public virtual Document Document { get; set; }
}
Context:
modelBuilder.Entity<User>(entity =>
{
entity.HasOne(u => u.Document)
.WithMany("AuthorId");
});
I am trying to use the solution they here, but no luck.
Any help would really be appreciated. Thanks!
But now i will be using a ForeignKey which is not the primary for the said table.
To do this you can use EF Core Alternate Keys feature. But first correct your model class set up as follows: (As you said a User will have multiple Document)
public class Document
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int DocumentId { get; set; }
public int ProjectId { get; set; }
public int DepartmentId { get; set; }
public int AuthorId { get; set; }
public User Author { get; set; }
}
public class User
{
[Key]
public int UserId { get; set; }
public int AuthUserId { get; set; }
public string DisplayName { get; set; }
public ICollection<Document> Documents { get; set; }
}
Then in the Fluent API configuration as follows:
modelBuilder.Entity<Document>()
.HasOne(p => p.Author)
.WithMany(b => b.Documents)
.HasForeignKey(p => p.AuthorId)
.HasPrincipalKey(b => b.AuthUserId); // <-- here you are specifying `AuthUserId` as `PrincipalKey` in the relation which is not primary key
I have a quiz sql schema and I am also using ASP.NET Identity. When I attempt to insert an answer from the user into the UserAnswer table I get the error below. It seems like it is trying to insert into the User table but I don't want that?
Violation of PRIMARY KEY constraint 'PK_AspNetUsers'. Cannot insert
duplicate key in object 'dbo.AspNetUsers'. The duplicate key value is
(71ddfebf-18ba-4214-a01e-42ca0f239804). Cannot insert explicit value
for identity column in table 'Questions' when IDENTITY_INSERT is set
to OFF. The statement has been terminated.
foreach (ProfileViewModel pvm in profileViewModels)
{
UserAnswer ua = new UserAnswer();
ua.QuestionId.ID = pvm.Question.ID;
ua.ApplicationUser.Id = userId;
ua.AnswerText = pvm.Answer;
_userAnswerRepository.Create(ua);
}
which just does
protected void Save() => _context.SaveChanges();
and the model is
public class UserAnswer
{
public UserAnswer()
{
this.QuestionId = new Question();
this.ApplicationUser = new ApplicationUser();
}
public int Id { get; set; }
public ApplicationUser ApplicationUser { get; set; }
public Question QuestionId { get; set; }
public string AnswerText { get; set; }
}
I guess I need to use virtual and not the actual object for some reason.. The model looked fine but it seems to confused the update
public class UserAnswer
{
public UserAnswer()
{
this.Question = new Question();
this.User = new ApplicationUser();
}
public int Id { get; set; }
public string UserId { get; set; } // FK to ApplicationUser
public int QuestionId { get; set; } // FK to Question
public string AnswerText { get; set; }
public virtual Question Question { get; set; }
public virtual ApplicationUser User { get; set; }
}
I am using ORMLite as my ORM and I am using it with following structure which contains the foreign key relation ship:
public class Order
{
[AutoIncrement]
public int Id { get; set; }
[Reference]
public Item Item { get; set; }
public string ProUserId { get; set; }
public string Details { get; set; }
}
public class Item
{
[AutoIncrement]
public int Id { get; set; }
public string Description { get; set; }
}
As we can see that Order contains the reference to the Item. In DB Order table has a foreign key called ItemId in the table and I have annotated that key in the design view with [Reference] attribute.
I am trying to save the Order with following code:
var order = new Order
{
Item = new Item
{
Id = 3,
Description = "Something"
},
ProUserId = "kunal#kunal.com",
Details = "fdfsdfsd"
};
Db.Save(order,references:true);
I was hoping that ORMLite would pick up the relationship and with ItemID in the Order table but it did not and it did throw following error instead:
Cannot insert the value NULL into column 'ItemId', table 'WebApp.dbo.Order'; column does not allow nulls. INSERT fails.
I tried changing my schema and addred OrderId column in my Item table with reference there and that works fine. But that is not the correct design. Should I make any changes in my code/schema to support this feature?
You still need to provide the foreign key that OrmLite can use to store the relationship, e.g. either on the Child/ForeignKey table:
public class Order
{
[AutoIncrement]
public int Id { get; set; }
[Reference]
public Item Item { get; set; }
public string ProUserId { get; set; }
public string Details { get; set; }
}
public class Item
{
[AutoIncrement]
public int Id { get; set; }
public int OrderId { get; set; } //Parent Table PK
public string Description { get; set; }
}
Or for 1:1 relationships, can be on the Parent table, e.g:
public class Order
{
[AutoIncrement]
public int Id { get; set; }
[Reference]
public Item Item { get; set; }
public int ItemId { get; set; } //Child Table PK
public string ProUserId { get; set; }
public string Details { get; set; }
}
public class Item
{
[AutoIncrement]
public int Id { get; set; }
public string Description { get; set; }
}
How can I apply not null and unique key constraint on a property from asp.net MVC model,
Below is my code:
public class Role
{
public int id { get; set; }
[Required]
[Index("RoelsIndex",IsUnique=true)]
public string Roles { get; set; }
}
Not sure what's your problem but Required and Index work fine when I try it.
public class Product
{
public int Id { get; set; }
[Required]
[Index(IsUnique = true)]
[MaxLength(400)]
public string Name { get; set; }
}
public class AppContext : DbContext
{
public DbSet<Product> Products { get; set; }
}