常见问题

luarocks错误 require ‘luasql.mysql' 报module 'luasql.mysql' not found:

错误：

require 'luasql.mysql'
stdin:1: module 'luasql.mysql' not found:
no field package.preload['luasql.mysql']
no file '/usr/local/share/lua/5.3/luasql/mysql.lua'
no file '/usr/local/share/lua/5.3/luasql/mysql/init.lua'
no file '/usr/local/lib/lua/5.3/luasql/mysql.lua'
no file '/usr/local/lib/lua/5.3/luasql/mysql/init.lua'
no file './luasql/mysql.lua'
no file './luasql/mysql/init.lua'
no file '/usr/local/lib/lua/5.3/luasql/mysql.so'
no file '/usr/local/lib/lua/5.3/loadall.so'
no file './luasql/mysql.so'
no file '/usr/local/lib/lua/5.3/luasql.so'
no file '/usr/local/lib/lua/5.3/loadall.so'
no file './luasql.so'
stack traceback:
[C]: in function 'require'
stdin:1: in main chunk
[C]: in ?

环境： ubuntu 已安装lua，未安装mysql

解决方案

一、先安装mysql

Ubuntu上安装MySQL非常简单只需要几条命令就可以完成。

1. sudo apt-get install mysql-server

2. apt-get install mysql-client

3.  sudo apt-get install libmysqlclient-dev

二 安装luasql-mysql

apt install luarocks

三 安装luasql-mysql 出错

Error: Could not find header file for MYSQL
No file mysql.h in /usr/local/mysql
You may have to install MYSQL in your system and/or pass MYSQL_DIR or MYSQL_INCDIR to the luarocks command.
Example: luarocks install luasql-mysql MYSQL_DIR=/usr/local

解决方法：

在终端执行whereis mysql 找到mysql 的include路径

luarocks install luasql-mysql MYSQL_INCDIR=/usr/include/mysql 

注释：配置自己查到的mysql.h 所在路径