[entity-framework] Entity framework code-first null foreign key

I prefer this (below):

public class User
{
    public int Id { get; set; }
    public int? CountryId { get; set; }
    [ForeignKey("CountryId")]
    public virtual Country Country { get; set; }
}

Because EF was creating 2 foreign keys in the database table: CountryId, and CountryId1, but the code above fixed that.

Examples related to entity-framework

Entity Framework Core: A second operation started on this context before a previous operation completed EF Core add-migration Build Failed Entity Framework Core add unique constraint code-first 'No database provider has been configured for this DbContext' on SignInManager.PasswordSignInAsync The instance of entity type cannot be tracked because another instance of this type with the same key is already being tracked Auto-increment on partial primary key with Entity Framework Core Working with SQL views in Entity Framework Core How can I make my string property nullable? Lazy Loading vs Eager Loading How to add/update child entities when updating a parent entity in EF

Examples related to mapping

Elasticsearch : Root mapping definition has unsupported parameters index : not_analyzed When do you use map vs flatMap in RxJava? How do you create nested dict in Python? Best Practices for mapping one object to another Create a map with clickable provinces/states using SVG, HTML/CSS, ImageMap Deserialize JSON to ArrayList<POJO> using Jackson How to force Hibernate to return dates as java.util.Date instead of Timestamp? Entity framework code-first null foreign key Mapping many-to-many association table with extra column(s) Mapping object to dictionary and vice versa

Examples related to ef-code-first

EntityType 'IdentityUserLogin' has no key defined. Define the key for this EntityType There is already an object named in the database The entity type <type> is not part of the model for the current context Entity Framework 6 Code first Default value Unique Key constraints for multiple columns in Entity Framework Entity Framework (EF) Code First Cascade Delete for One-to-Zero-or-One relationship Introducing FOREIGN KEY constraint may cause cycles or multiple cascade paths - why? How to delete and recreate from scratch an existing EF Code First database Entity Framework: One Database, Multiple DbContexts. Is this a bad idea? Ignoring a class property in Entity Framework 4.1 Code First

Examples related to foreign-key-relationship

SQL Add foreign key to existing column What does principal end of an association means in 1:1 relationship in Entity framework Entity framework code-first null foreign key How to change the foreign key referential action? (behavior) Foreign key referencing a 2 columns primary key in SQL Server What is `related_name` used for in Django? When to use "ON UPDATE CASCADE"

Examples related to entity-framework-4.1

Entity Framework Join 3 Tables How to include a child object's child object in Entity Framework 5 Ignoring a class property in Entity Framework 4.1 Code First The type or namespace name 'Entity' does not exist in the namespace 'System.Data' Validation failed for one or more entities. See 'EntityValidationErrors' property for more details StringLength vs MaxLength attributes ASP.NET MVC with Entity Framework EF Code First Entity framework code-first null foreign key How do I detach objects in Entity Framework Code First? Entity Framework Code First - two Foreign Keys from same table How Should I Declare Foreign Key Relationships Using Code First Entity Framework (4.1) in MVC3?