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EF connection MySQL Error

Source: Internet
Author: User
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The model cannot be generated because the following exception exists: ' System.Data.StrongTypingException: The Value of column ' IsPrimaryKey ' in table ' Tabledetails ' is DBNull. ---> system.invalidcastexception: The specified conversion is not valid.

Solution:

Restart the MySQL service.

use <<database name>>; set global optimizer_switch=‘derived_merge=OFF‘;



添加新属性时直接在数据库中添加然后直接右键update from database，删除属性时先在数据库删除，再在表里删除这个属性。

EF connection MySQL Error

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