仅通过FluentAPI使用外键定义实体框架关系 [英] Define Entity Framework relationships using foreign keys only by FluentAPI

问题描述

是否可以通过FluentAPI仅使用外键（无引用类型的虚拟属性）来定义Entity Framework关系（不应该更改数据模型）？

Is any way of defining Entity Framework relations using foreign keys only (no virtual properties of reference type) with FluentAPI (data models should not be changed)?

CardDataModel

public class CardDataModel
{
    public int CardId { get; set; }

}

CheckItemDataModel

public class CheckItemDataModel
{
    public int CheckItemId { get; set; }
    public int CardId { get; set; }
}

推荐答案

是的，可能EF核心。它不在EF6及更低版本中，但现在EF Core提供了 HasMany / HasOne 的无参数重载，从而可以配置关系：

Yes, it's possible in EF Core. It wasn't in EF6 and below, but now EF Core provides parameterless overloads of HasMany / HasOne which allow configuring such relationship:

modelBuilder.Entity<CardDataModel>()
    .HasMany<CheckItemDataModel>() // <-- note this
    .WithOne()
    .HasForeignKey(e => e.CardId);

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