Django与FOREIGN KEY的Mysql迁移错误150

Question

我需要帮助调试迁移。

我试图逐步执行每个查询，以找到django迁移停止的位置。

查询失败：

mysql> ALTER TABLE `elezioniAgendaCore_comments` ADD CONSTRAINT `elezioniAgendaCore_comments_uid_id_670175fa07fa7b47_fk_user_uid` FOREIGN KEY (`uid_id`) REFERENCES `user` (`uid`); 

出现错误：

ERROR 1005 (HY000): Can't create table 'activedoc.#sql-3f7_2b' (errno: 150) 

我拖表。

表用户：

mysql> show columns from user; 
+-------------------+--------------+------+-----+---------+----------------+ 
| Field    | Type   | Null | Key | Default | Extra   | 
+-------------------+--------------+------+-----+---------+----------------+ 
| uid    | bigint(20) | NO | PRI | NULL | auto_increment | 
| name    | varchar(50) | YES | MUL | NULL |    | 
| surname   | varchar(50) | YES | MUL | NULL |    | 
| email    | varchar(100) | YES | MUL | NULL |    | 
+-------------------+--------------+------+-----+---------+----------------+ 

表elezioniAgendaComments：

mysql> show columns from elezioniAgendaCore_comments; 
+------------------+--------------+------+-----+---------+----------------+ 
| Field   | Type   | Null | Key | Default | Extra   | 
+------------------+--------------+------+-----+---------+----------------+ 
| id    | int(11)  | NO | PRI | NULL | auto_increment | 
| signature  | varchar(255) | NO |  | NULL |    | 
| message   | longtext  | NO |  | NULL |    | 
| created   | datetime  | NO |  | NULL |    | 
| published  | tinyint(1) | NO |  | NULL |    | 
| adempimento_id | int(11)  | NO | MUL | NULL |    | 
| parentComment_id | int(11)  | YES | MUL | NULL |    | 
| uid_id   | bigint(20) | NO |  | NULL |    | 
+------------------+--------------+------+-----+---------+----------------+ 

Answer 1

我发现了一个表，用MyISAM引擎创建：

SHOW CREATE TABLE user; 

[...]

) ENGINE=MyISAM AUTO_INCREMENT=307 DEFAULT CHARSET=latin1 | 

其他表：

mysql> SHOW CREATE TABLE elezioniAgendaCore_comments; 

[...]

) ENGINE=InnoDB DEFAULT CHARSET=latin1 | 

然后我迁移到InnoDB的两个表。这次没有错误。