issue for lua-resty-redis

nginx.conf

 74         location /test {
 75             default_type 'text/plain';
 76             lua_code_cache off;
 77             content_by_lua_file luas/test.lua;
 78         }

test.lua

local testm = require('testm')


ngx.say("ok test")

testdb.lua

module('testdb',package.seeall)

local redis = require "resty.redis"

local mt = { __index = testdb }

local rtdb = nil

function get_rtdb(self)
    if self.rtdb then return self.rtdb end

    self.rtdb = redis:new()
    self.rtdb:set_timeout(1000) -- 1 sec
ngx.log(ngx.ERR, 1)
    local ok, err = self.rtdb:connect("127.0.0.1", 6381)
ngx.log(ngx.ERR, 2)
    if not ok then
        return nil
    end
    return self.rtdb
end

return setmetatable({rtdb}, mt)

testm.lua

module('testm',package.seeall)


local testdb = require('testdb')

local rtdb = testdb:get_rtdb()

r,err = rtdb:hmget(123, 'sid', 'uid')

ngx.say("ok testm")

testm1.lua

module('testm',package.seeall)

local testdb = require('testdb')

function foo()
    local rtdb = testdb:get_rtdb()
    r,err = rtdb:hmget(123, 'sid', 'uid')

    ngx.say("ok testm")
end