working ngx_postgres

nginx.conf

user derek users;
worker_processes  1;
error_log logs/error.log;

# I like to use these two directives for development so I can have server and log in foreground
# daemon off;
# error_log stderr notice;

events {
	worker_connections 1024;
}

http {
	server {
		listen 8080;
		charset utf-8;
		default_type application/json;

		location /  {
			content_by_lua '
				local query = require("query")
				query("SELECT js FROM peeps.active_emailers()")
			';
		}

		location ~ /person/(?<id>[0-9]+)$ {
			content_by_lua '
				local query = require("query")
				query("SELECT js FROM peeps.get_person(?)", ngx.var.id)
			';
		}

		location /search {

			content_by_lua '
				local query = require("query")
				query("SELECT js FROM peeps.people_search(?)", ngx.var.arg_q)
			';
		}
	}
}

query.lua

local pgmoon = require("pgmoon")
local json = require("cjson") -- cjson comes with openresty

-- run the query, and write the output as json to the 
return function(q, ...)
  -- create a pointer to our database connection
  local db = pgmoon.new({
    host = "127.0.0.1",
    port = "5432",
    database = "d50b",
    user = "d50b"
  })

  -- create a new connection, or pull from connection pool if available
  db:connect()

  -- quck script to interpolate query params if they are passed
  if ... then 
    local varargs = {...}
    local i = 0
    q = q:gsub("%?", function()
      i = i + 1
      return db:escape_literal(varargs[i])
    end)
  end

  -- run the query
  -- assert will throw 500 error, and write to notice log if query fails. (this
  -- is because a failed query returns two return values: nil, the error
  -- message)
  local res = assert(db:query(q))

  -- write to the output to nginx
  ngx.say(json.encode(res))

  db:keepalive() -- give connection back to connection pool
end