entity-framework-6 - EntityFramework - 将 WithRequired 移植到 EF Core

Question

我正在将应用程序从 MVC5/EF6 移植到 MVC6/EF7，但此特定行有问题:

        modelBuilder.Entity<Client>().HasMany(c => c.Payments).WithRequired(e => e.Client).WillCascadeOnDelete(false);

显然，WillCascadeOnDelete 已转换为 OnDelete，并将 restrict 作为参数，但我找不到关于“WithRequired”部分的任何文档，该部分在 EF7 中也已消失。具有“WithOne”相同的影响还是我在这里完全错了:

        modelBuilder.Entity<Client>().HasMany(c => c.Payments).WithOne(e => e.Client).OnDelete(Microsoft.EntityFrameworkCore.Metadata.DeleteBehavior.Restrict);

Answer 1

你在这两种情况下都是正确的。这是一个详细的帖子... http://www.mikee.se/posts/migrating_from_ef6_to_ef_core

Typically these mappings would change from this in EF6.

x.Entity<Company>()
    .HasMany(c => c.StatementOfEarnings)
    .WithRequired(e => e.Company)
    .WillCascadeOnDelete(false);

To this in EF Core

x.Entity<Company>()
    .HasMany(c => c.StatementOfEarnings)
    .WithOne(e => e.Company)
    .OnDelete(DeleteBehavior.Restrict);