How to update model working with EF code first with 'Code First from Database'

How to create Multiple one-to-one relationships in EF Code first?

Third Edit: Changed plenty of my code at the end of the question, left the original just in case that was the way to go.......I'm having a problem understanding how to work with multiple one-to-one relationships in EF. I already had made a one-to-one relationship between two models, but when I tried to add another model one-to-one relationship to t...

EF Code-First One-to-one relationship: Multiplicity is not valid in Role * in relationship

I'm attempting to do the following:...public class class1 { public int Id {get;set;} [ForeignKey("Class2")] public int Class2Id {get;set;} public virtual Class2 Class2 {get;set;} } public class class2 { public int Id { get; set;} [Required] public virtual int Class1Id {get;set;} [Required] [ForeignKey("Class1Id"...

auto update code first from database model, is it possible?

I have code first classes which are generated from my existing db using ADO.NET Entity Data Model. Now I've added some new tables to the database. ...I want to know if its possible to create associated code classes from the new db tables without (re)creating the model again from scratch?

Solutions with one EF6 model (db first) and one code first

I have a solution that has multiple databases. We are using EF6....We have one Project that is EF6 (code first), and one project that is EF6 DB first....var arkleModelDbFist = new Arkle.DAL.EF.ArkleEntities(); var CustomerOld= new Arkle.DAL.EF.Customer(); arkleModelDbFist.Customers.Add(CustomerOld); // Errors on this line arkleModelDbFist.SaveChang...

EF 6 - Code first invalid one-to-one foreign key relationship

DESIGN BACKGROUND...:...I'm trying to create code-first EF6 mappings for the following database structure:...The database design is as follow: Instead of having "CustomerID" as foreign key on all related entities (Employment, expenses, income, etc...), we have a CustomerRelationship table, which will contain the CustomerID, and then a "RelatedID" c...

Combine Code First & Database First In Single Model?

Take a look at the following link. I answered another question in a similar fashion:...How to use Repository pattern using Database first approach in entity framework...As I mentioned in that post, I would personally try to switch to a Code First approach and get rid of the EDMX files as it is already deprecated and most importantly, the maintenanc...

One to One Relationship with Different Primary Key in EF 6.1 Code First

I am having an issue getting a reference to the employee object from the PayGroup object using Entity Framework 6.1. I have a foreign key in the database on PayGroup.SupervisorId -> Employee.EmployeeId. Note that this is a zero or one-to-one relationship (a pay group can only have one supervisor and an employee can only be the supervisor of one pay...

EF - Code first - update database after model changes

I created a web api application in ....net core 2.0... and I create my database using code first approach and using the commands ...add-migration... , ...update-database...Now I made some changes in my model classes and created a new migration using ...add-migration 2ndMigration... command. It created the migration with ...Up... and ...Down... meth...

Entity Framework code-first : how to add more props on model and update database?

I have created a new ASP.NET Core 2.0 project with Visual Studio 2017. Currently I have a ...Coach... model class:...public class Coach { public int ID { get; set; } public string Name { get; set; } public string Location { get; set; } public string Methodology { get; set; } public string Price { get; set; } ...

What is the difference between EF Core Database-First and EF Core Code-First approaches?

I was wondering... since there is no EDMX in EF Core, what is the difference between those 2? And if the major difference would be the possibility to change the database tables, why not use code first then use EF code-first migrations?