The EF Core in-memory database does not currently support cascade deletes in the database. Twissija Do not configure cascade delete in the database when soft-deleting entities. This may cause entities to be accidentally really deleted instead of soft-deleted. ...
你必须告诉 EF Core 哪个实体类需要一个查询过滤器,该过滤器是查询表达式,用来把不需要被看到的实体过滤掉。你可以在 DbContext 中使用以下代码手动完成此操作。 public class EfCoreContext : DbContext { public EfCoreContext(DbContextOptions<EfCoreContext> option) : base(options) {} protected override OnMo...
我假设一个典型的 EF Core 类具有普通的读/写属性,但是你可以将它适应其他实体类样式,比如域驱动设计(DDD)风格的实体类。 1. 添加软删除属性 对于标准的软删除实现,你需要一个布尔标志来控制软删除。例如,这里有一个名叫 SoftDeleted 属性的 Book 实体。 publicclassBook:ISoftDelete{publicintBookId {get;set;...
Currently: Cascade delete happens as part of SaveChanges. This prevents cascades happening when all that is intended is a re-parenting. Fixup of non-deleted entities to no longer reference deleted entities happens after SaveChanges. This...
EF Core 7.0 (EF7) will be the next release after EF Core 6.0. It will be released alongside .NET 7 in November 2022. The EF Core 7.0 Plan is available publicly in our documentation. As always, feedback is greatly appreciated. This plan is not set-in-stone; we expect it will evolve...
第二种方式:使用.Net Core CLI,执行以下命令 1#dotnet ef dbcontext scaffold "数据库连接字符串" 数据库提供程序 -o 输出文件夹2dotnet ef dbcontext scaffold"server=localhost;port=3306;database=blogging;user=root;password=admin;"MySql.Data.EntityFrameworkCore -o Models ...
# 比如,建立一个Mysoft.ProcessEngine.DbMigrator的Console类型的工程,通过如下命令更新 dotnet Mysoft.ProcessEngine.DbMigrator.dll 1.3. 数据延迟加载 延迟加载需要引入一个EFCore的扩展程序集:Microsoft.EntityFrameworkCore.Proxies,该程序集提供了DbContextBuilder的扩展方法UseLazyLoadingProxies()来开启DbContext的延迟...
下是 background进程留下的文件 cdump目录是 core进程转存的文件 udump应该是 user进程留下的文件 系统进程出错前写入的信息.一般不可能读懂. 你可以以下 SQL找到他的路径 selectvaluefromv$PARAMETERwherename='user_dump_dest'; SQL>altersessionsettimed_statistics=TRUE; SQL>altersessionsetevents'10046tracename...
Core铁心、核心、磁心 Core loss铁(芯损)耗 Corner角落 Correction修正、改正 Corrosion腐蚀 Cost价格、成本、费用 Cost of fuel燃料费用 Cost of upkeep日常费用、维护费用 Coupler联轴器 Coupling耦合、联轴 Couple CPL联轴器 Crane起重机 Critical临界的 Critical speed临界速度 Crusher碎渣机 Current transformer CT电流...
被上司叫道安排任务的时候应该先做什么（ ）View the Exhibit and examine the user information. The user has been granted CONNECT and RESOURCE roles and no individual system privileges. TheSL_REP user executes this command to create ...