EF Code First DbMigration without nuget

EF Code First allows cascading deletes without exposing foreign keys.

Yup! Remove JobId and add the following:... protected override void OnModelCreating(ModelBuilder modelBuilder) { modelBuilder.Entity<Job>().HasMany(j => j.Projects).WithRequired(); } ...In the database, this will add a cascading delete in the PK/FK relationship....(I'm assuming that your ModelBase has an integer Id =)

EF Code First Migrations: MigrateDatabaseToLatestVersion without NUGET

Simply use ...MigrateDatabaseToLatestVersion.......when my application starts, it must create database, if database does not exists;...MigrateDatabaseToLatestVersion... will do that...then database schema must be adjusted to the model;...MigrateDatabaseToLatestVersion... will do that...if database was created just now, I want to create some indexes...

Implementing Zero Or One to Zero Or One relationship in EF Code first by Fluent API

By changing pocos to:...public class Order { public int OrderId { get; set; } public virtual Quotation Quotation { get; set; } } public class Quotation { public int QuotationId { get; set; } public virtual Order Order { get; set; } } ...and using these mapping files:...public class OrderMap : EntityTypeConfiguration<Order> { pub...

Generate ntext/nvarchar column when using Entity Framework Code First and a DBMigration

Seems like the bug is fixed for Entity Framefork v6.1.3....The following definition works as expected - creates ...ntext... column....[Column(TypeName = "ntext")] public string FileData { get; set; }

How to edit previously applied migration without adding another migration in EF code first

TL;DR:... This is very complicated - it's a lot easier just to add a new migration later to correct the problem....An Entity Framework migration consists of two parts - the code, and a hash of the model. The hash of the model is used to determine whether the model has changed, and hence whether any new migrations are required. ...If you change th...

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

Go through the generation process, and during the generation process, it allows you to select tables. Select the newer ones only....Instead of selecting all tables, expand the little triangle and select what you need. You also will have to select any dependent tables, or else the process will fail. If those dependent tables are already there, just ...

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

For it to be (One-to-One) ...LedgerChartOfAccount... should have a primary key of ...public int CatalogoDeCuentasID {get; set;}...In the model builder your configuration should look like this: ...modelBuilder.Entity<LedgerChartOfAccount>() .HasKey(x => x.CatalogoDeCuentasID); modelBuilder.Entity<LedgerChartOfAccount>() ...

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

Your model is not a 1:1 association. You can still have ...many...Class2... objects referring to the same ...one...Class1... object. Also, your model doesn't guarantee that a ...Class2... referring to a ...Class1... is also referred back by this ...Class1... object — ...Class1... can refer to any ...Class2... object....How to configure 1:1?...The...

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

You need a base class configuration for all the shared properties (including the primary key)....public class CustomerRelationshipMap : EntityTypeConfiguration<CustomerRelationship> { public CustomerRelationshipMap() { ToTable("tblCustomerRelationship"); Map<EmploymentRelationship>(m => m.Requires("CustomerRelationshipTypeI...

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

one-to-one... relationship with explicit FK property (like your ...PayGroup.SupervisorId...) is not supported....So remove that property from the model:...public class PayGroup { public int Id { get; set; } public virtual Employee Supervisor { get; set; } } ...and use the following fluent mapping:...modelBuilder.Entity<PayGroup>() .HasR...