Question

我有一张注册表，允许学校注册。除了明显的登录和一般细节，学校还可以从他们拥有的设施和认证列表中选择。

我的数据显示正常且可以绑定。

问题将数据输入链接器表不起作用，它会以我尝试过的两种方式抛出错误：

方法一：

MembershipUser membershipUser = null;

if (schoolRegisterModel != null)
{
    if (null != DB)
    {
        school SchoolUser = new school();

        SchoolUser.username = schoolRegisterModel.UserName;
        SchoolUser.email = schoolRegisterModel.Email;

        string sPassowrdSalt = Security.Instance().CreateSalt();

        SchoolUser.password = Security.Instance().CreatePasswordHash(schoolRegisterModel.Password, sPassowrdSalt);

        SchoolUser.password_salt = sPassowrdSalt;

        ..More data etc..

        foreach (var item in schoolRegisterModel.Facilities)
        {
            if (item.@checked)
            {
                school_facility sf = new school_facility();
                sf.facility_id = item.facility_id;
                SchoolUser.school_facility.Add(sf);
            }
        }

        foreach (var item in schoolRegisterModel.Accreditations)
        {
            if (item.@checked)
            {
                school_accreditation sa = new school_accreditation();
                sa.accreditation_id = item.accreditation_id;
                SchoolUser.school_accreditation.Add(sa);
            }
        }

        DB.schools.Add(SchoolUser);
        DB.SaveChanges();

错误： {“INSERT语句与FOREIGN KEY约束冲突\”FK_school_facility_facility \“。冲突发生在数据库\”MYDB \“，table \”dbo.facility \“，列'facility_id'。\ r \ n声明已被终止。“}

此外 - 我是否需要手动检索即将成为基于此插页生成的学校ID。此方法避免仅使用主表（school）将数据直接输入到链接器表中。

方法2：

相同的代码再次尝试直接更新主表（学校）认证和设施集合，我手动更新链接器表使用上一个查询生成的最新主键，代码如下：

MembershipUser membershipSuser = null;

if (schoolRegisterModel != null)
{
    if (null != DB)
    {
        school SchoolUser = new school();

        SchoolUser.username = schoolRegisterModel.UserName;
        SchoolUser.email = schoolRegisterModel.Email;

        string sPassowrdSalt = Security.Instance().CreateSalt();

        SchoolUser.password = Security.Instance().CreatePasswordHash(schoolRegisterModel.Password, sPassowrdSalt);

        SchoolUser.password_salt = sPassowrdSalt;

        ..More data etc..

        // Linker data for facilities and accreditations.
        // Facilities
        foreach (var item in schoolRegisterModel.Facilities)
        {
            if (item.@checked)
            {
                school_facility sf = new school_facility();
                sf.facility_id = item.facility_id;
                sf.school_id = SchoolUser.school_id;
                DB.school_facility.Add(sf);
            }
        }

        // Accreditations
        foreach (var item in schoolRegisterModel.Accreditations)
        {
            if (item.@checked)
            {
                school_accreditation sa = new school_accreditation();
                sa.accreditation_id = item.accreditation_id;
                sa.school_id = SchoolUser.school_id;
                DB.school_accreditation.Add(sa);
            }
        }

        m_DB.SaveChanges();

错误： {“INSERT语句与FOREIGN KEY约束冲突\”FK_school_facility_facility \“。冲突发生在数据库\”MYDB \“，table \”dbo.facility \“，列'facility_id'。\ r \ n声明已被终止。“}

如果你们知道我哪里出错了，请告诉我。似乎有更新链接器表日期的例子（无论如何我都需要它）但是找不到我的问题的例子...

提前致谢。

Answer 1

看起来我找到了答案：

MVC: The INSERT statement conflicted with the FOREIGN KEY constraint

我的数据通过基本上没有包含正确的外键值（0 - 不存在），而且我的数据库正在抛出错误。很抱歉浪费时间阅读和感谢您的时间。我希望这可以帮助别人。

乔

MVC - 将数据添加到链接器表中

1 个答案: