Entity Framework连接MySQL时：由于出现以下异常,无法生成模型:“表“TableDetails”中列“IsPrimaryKey”的值为DBNull.
解决方案：
Execute the following commands in MySQL.
use <<database name>>;
set global optimizer_switch=‘derived_merge=OFF‘;
http://stackoverflow.com/questions/33575109/mysql-entity-the-value-for-column-isprimarykey-in-table-tabledetails-is
“TableDetails”中列“IsPrimaryKey”的值为DBNull.
原文：http://www.cnblogs.com/haoliansheng/p/5643303.html