在 Entity Framework 6 Code First 中创建一对一关系时出错

Question

我正在按照本教程建立一对一关系，但无济于事。 http://www.entityframeworktutorial.net/code-first/configure-one-to-one-relationship-in-code-first.aspx

这是我的快速模型

public class Information
{
    public int InformationId { get; set; }

    public string Thing1 {get; set;}
    public string Thing2 { get; set;}

    public ICollection<Item> Items { get; set; }
    public Account Account { get; set; }
}

public class Account
{
    [Key, ForeignKey("Information")]
    public int InformationId { get; set; }

    public string Thing1 { get; set; }

    public Information Information { get; set; }
}

然后我针对它执行此操作

var information = new List<Information>{
            new Information(){
                Thing1 = "this",Thing2="that"
            }
        };
        information.ForEach(s => context.Information.Add(s));
        context.SaveChanges();

        var account = new List<Account>{
            new Account(){Thing1="one"}
        };
        account.ForEach(s => context.Accounts.Add(s));
        context.SaveChanges();

错误

{"The INSERT statement conflicted with the FOREIGN KEY constraint \"FK_dbo.Account_dbo.Information_InformationId\". The conflict occurred in database \"TestEF\", table \"dbo.Information\", column 'InformationId'.\r\nThe statement has been terminated."}

Answer 1

先存账号，再存信息

var account = new List<Account>{
            new Account(){Thing1="one"}
        };
        account.ForEach(s => context.Accounts.Add(s));
        context.SaveChanges();

var information = new List<Information>{
            new Information(){
                Thing1 = "this",Thing2="that"
            }
        };
        information.ForEach(s => context.Information.Add(s));
        context.SaveChanges();

在 Entity Framework 6 Code First 中创建一对一关系时出错

Error creating One-to-One relationships in Entity Framework 6 Code First

entity-framework

one-to-one

ef-code-first