luasql 空值

我尝试按照http://www.keplerproject.org/luasql/examples.html的示例操作

Lua 5.2.0  Copyright (C) 1994-2011 Lua.org, PUC-Rio
> require "luasql.postgres"
> env = assert (luasql.postgres())
stdin:1: attempt to index global 'luasql' (a nil value)
stack traceback:
    stdin:1: in main chunk
    [C]: in ?
>

我缺少什么?

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用户809029
用户809029

你可以尝试使用以下代码:

luasql = require "luasql.postgres"
env = assert (luasql.postgres())
2012-07-25 19:32:32