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Last active April 25, 2019 21:01
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Unobtrusive JavaScript solution for polling in a Rails application
###
Unobtrusive JavaScript solution for polling in a Rails application
Introduction:
Add a polling-placeholder wrapper div to any partial and add a data attribute
named poll that should be equal to "true" until you want to stop polling.
The default polling frequency will be used unless you provide an "interval" data
attribute which should be the number of milliseconds to use for the interval.
The name of the partial to render should be provided in the url params.
Example partial:
<div class="polling-placeholder">
<div id="foo_1" class="object" data-poll="true" data-url="/foo/1?partial=bar" data-interval="500">
<p>Hello World</p>
</div>
</div>
Example controller:
class FooController < ApplicationController
def show
@foo = Foo.find(params[:id])
respond_to do |format|
render partial: "foos/#{params[:partial]}", locals: { foo: @foo }
end
end
end
###
class Poller
constructor: (@div) ->
interval: ->
$(@div).data("interval") ? 3000
url: ->
$(@div).data("url")
start: ->
@intervalId = setInterval(@request, @interval())
request: =>
$.ajax(url: @url(), dataType: "script").always (data) =>
@replace(data.responseText) if data.status == 200
replace: (responseText) ->
placeholder = $(responseText)
partial = $($(responseText).html())
$("div#" + $(@div).attr("id")).closest("div.polling-placeholder").html(placeholder.html())
@stop() unless partial.data("poll")
stop: ->
clearInterval(@intervalId)
$ ->
$("div[data-poll='true']").each (i, div) ->
new Poller(div).start()
@mavu
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mavu commented Apr 6, 2018

Has anyone successfullyh used this in a rails 5 application with turbolinks in production mode?
It works fine in development, but does not in production. I suspect it to be some kind of turbolinks related issue, and tried

$(document).on('turbolinks:load', ->
to load it, but that does not work either.

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