.NET Core使用EF时 报错如下信息：The entity type XXX requires a primary key to be defined. If you intended to use a keyless entity type call HasNoKey 源代码为：Model.DataModelContext context new Model.DataModelContex ...
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Attaching an entity of type 'xxx' failed because another entity of the same type already has the same primary key value. This can happen when using ...
问题的详细描述： Attaching an entity of type 'xxxxx' failed because another entity of the same type already has the same primary key value. This can happen ...
ASP.NET MVC项目 Repository层中，Update、Delete总是失败 another entity of the same type already has the same primary key value 在项目里的Repository层中的涉及到数据的update ...
EF Core 修改实例报错：==》》 System.InvalidOperationException: The instance of entity type 'ProductInfo' cannot be tracked because another instance ...
今天遇到了一个奇葩问题，虽然解决了，但还是一脸懵，先附赠一下别人的解决方案：https://www.cnblogs.com/zwjaaron/archive/2012/06/08/2541430. ...
在做单元测试的时候碰到以下报错： 具体报错代码如下： 项目平时运行是没问题的，但在单元测试时会报错，可能跟在测试时一个方法里多次调用有关。 我的做法如下：使用try catch，在异常里操作 1、修改状态 Entry (entity).State ...
具体详细错误信息：The instance of entity type 'xxx' cannot be tracked because another instance with the same key value for {'Id'} is already being tracked. ...
报错： Error: Cannot call .tap() on a plugin that has not yet been defined. Call plugin('html').use(<Plugin>) first. 配置 if (isProd ...
