{ title: “Lapis Console” }

Lapis Console

Lapis Console is a separate project that adds an interactive console to your web application. Because Lapis runs inside of the Nginx loop, it’s not trivial to make a standard terminal based console that behaves the same way as the web application. So a console that runs inside of your browser was created, letting you reliably execute code in the same way as your web application when debugging.

Lapis Console Screenshot

Install through LuaRocks:

$ luarocks install lapis-console

Creating A Console


Lapis console provides an action that you can insert into your application to a route of your choosing:

local lapis = require("lapis")
local console = require("lapis.console")

local app = lapis.Application()

app:match("/console", console.make())

return app
lapis = require "lapis"
console = require "lapis.console"

class extends lapis.Application
  "/console": console.make!

Now just head to to the /console location in your browser to use it. By default the action that is created will only run in the "development" environment.

You can set the env option in the first argument to "all" to enable in every environment, or you can name an environment.

Be careful about allowing access to the console, a malicious individual could destroy your application and compromise your system if given access.


The console lets your write and execute a MoonScript program. Multiple lines are supported.

The print function has been replaced in the console to print to the debug output. You can print any type of object and the console will pretty print it. Tables can be opened up and other types are color coded.

Any queries that execute during the script are logged to a special portion on the bottom of the output.

@ is equal to the value of the request that is initiating the console. You can use this if you are testing a method that needs a request object.