Hubot中的Coffeescript错误“未定义不是函数”

Question

I'm making call to my django app that returns a JSON object and I'm using the following code to do so:

robot.hear /lunch for today/i, (res) ->
    robot.http("http://my_ip_address/show")
        .header('Accept', 'application/json')
        .get() (err, res, body) ->
            data = JSON.parse body
            res.send data.food

but it returns ERROR TypeError: undefined is not a function in the console. What's wrong with this?

Answer 1

is should look like this:

module.exports= (robot) ->
  robot.hear /lunch for today/i, (msg) ->
    robot.http("http://my_ip_address/show")
      .header('Accept', 'application/json')
      .get() (err, res, body) ->
        console.log res.statusCode
        data = JSON.parse body
        msg.send data.food

I believe the reason it is failing is because you are using res in the place of msg and then res again in the context of the function .get()

Answer 2

I'm guessing the error is on this line:

.get() (err, res, body) ->

Instead of passing the callback as an argument to get , you're calling get with no arguments and then trying to call the result (which is undefined ) as though it were a function. My CoffeeScript is rusty, but I think you want this instead:

.get (err, res, body) ->

Answer 3

It might be incompatible version of installed hubot and documentation but I found out the res from an http method has no send, but the one from the /hear command does.

robot.hear /lunch for today/i, (res) ->
    robot.http("http://my_ip_address/show")
        .header('Accept', 'application/json')
        .get() (err, msg, body) ->
            data = JSON.parse body
            res.send data.food

This should work, but either the official documentation is wrong, either the default installation of hubot is outdated.