我重命名了几个实体及其导航属性,并在EF 5中生成了一个新的Migration。与EF迁移中的重命名一样,默认情况下,它将删除对象并重新创建它们。那不是我想要的,所以我几乎不得不从头开始构建迁移文件。
public override void Up()
{
DropForeignKey("dbo.ReportSectionGroups", "Report_Id", "dbo.Reports");
DropForeignKey("dbo.ReportSections", "Group_Id", "dbo.ReportSectionGroups");
DropForeignKey("dbo.Editables", "Section_Id", "dbo.ReportSections");
DropIndex("dbo.ReportSectionGroups", new[] { "Report_Id" });
DropIndex("dbo.ReportSections", new[] { "Group_Id" });
DropIndex("dbo.Editables", new[] { "Section_Id" });
RenameTable("dbo.ReportSections", "dbo.ReportPages");
RenameTable("dbo.ReportSectionGroups", "dbo.ReportSections");
RenameColumn("dbo.ReportPages", "Group_Id", "Section_Id");
AddForeignKey("dbo.ReportSections", "Report_Id", "dbo.Reports", "Id");
AddForeignKey("dbo.ReportPages", "Section_Id", "dbo.ReportSections", "Id");
AddForeignKey("dbo.Editables", "Page_Id", "dbo.ReportPages", "Id");
CreateIndex("dbo.ReportSections", "Report_Id");
CreateIndex("dbo.ReportPages", "Section_Id");
CreateIndex("dbo.Editables", "Page_Id");
}
public override void Down()
{
DropIndex("dbo.Editables", "Page_Id");
DropIndex("dbo.ReportPages", "Section_Id");
DropIndex("dbo.ReportSections", "Report_Id");
DropForeignKey("dbo.Editables", "Page_Id", "dbo.ReportPages");
DropForeignKey("dbo.ReportPages", "Section_Id", "dbo.ReportSections");
DropForeignKey("dbo.ReportSections", "Report_Id", "dbo.Reports");
RenameColumn("dbo.ReportPages", "Section_Id", "Group_Id");
RenameTable("dbo.ReportSections", "dbo.ReportSectionGroups");
RenameTable("dbo.ReportPages", "dbo.ReportSections");
CreateIndex("dbo.Editables", "Section_Id");
CreateIndex("dbo.ReportSections", "Group_Id");
CreateIndex("dbo.ReportSectionGroups", "Report_Id");
AddForeignKey("dbo.Editables", "Section_Id", "dbo.ReportSections", "Id");
AddForeignKey("dbo.ReportSections", "Group_Id", "dbo.ReportSectionGroups", "Id");
AddForeignKey("dbo.ReportSectionGroups", "Report_Id", "dbo.Reports", "Id");
}
我要做的就是重命名dbo.ReportSections
为dbo.ReportPages
,然后命名dbo.ReportSectionGroups
为dbo.ReportSections
。然后,我需要外键列上的重命名dbo.ReportPages
,从Group_Id
到Section_Id
。
我删除将表链接在一起的外键和索引,然后重命名表和外键列,然后再次添加索引和外键。我以为这是行得通的,但是我遇到了SQL错误。
消息15248,级别11,状态1,过程sp_rename,行215参数@objname含糊或声明的@objtype(COLUMN)错误。消息4902,级别16,状态1,行10找不到对象“ dbo.ReportSections”,因为它不存在或您没有权限。
我没有轻松的时间弄清楚这里出了什么问题。任何见解将大有帮助。