.NET Core使用EF時 報錯如下信息：The entity type XXX requires a primary key to be defined. If you intended to use a keyless entity type call HasNoKey 源代碼為：Model.DataModelContext context new Model.DataModelContex ...
2020-04-10 14:21 0 4639 推薦指數：
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 ...
問題的詳細描述： 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項目 Repository層中，Update、Delete總是失敗 another entity of the same type already has the same primary key value 在項目里的Repository層中的涉及到數據的update ...
EF Core 修改實例報錯：==》》 System.InvalidOperationException: The instance of entity type 'ProductInfo' cannot be tracked because another instance ...
今天遇到了一個奇葩問題，雖然解決了，但還是一臉懵，先附贈一下別人的解決方案：https://www.cnblogs.com/zwjaaron/archive/2012/06/08/2541430. ...
在做單元測試的時候碰到以下報錯： 具體報錯代碼如下： 項目平時運行是沒問題的，但在單元測試時會報錯，可能跟在測試時一個方法里多次調用有關。 我的做法如下：使用try catch，在異常里操作 1、修改狀態 Entry (entity).State ...
具體詳細錯誤信息：The instance of entity type 'xxx' cannot be tracked because another instance with the same key value for {'Id'} is already being tracked. ...
報錯： Error: Cannot call .tap() on a plugin that has not yet been defined. Call plugin('html').use(<Plugin>) first. 配置 if (isProd ...
