Task not setting variables properly? - volt

Question

Having some issues getting a variable passed to the client. The task that gets run is this:
def getmaps
$mapnames_current = []
url = 'http://s3-ap-northeast-1.amazonaws.com/splatoon-data.nintendo.net/stages_info.json'
resp = Net::HTTP.get_response(URI.parse(url))
buffer = resp.body
result = JSON.parse(buffer)
result.each do |gamemode|
gamemode['stages'].each do |stage|
$mapnames_current << $mapnames.key(stage['id'])
end
end
end
and $mapnames_current gets called here:
<div class="text-center">
<h2>Current Maps!</h2>
<h3>Turf War:</h3>
<h2>{{ $mapnames_current[0] }}</h2>
<h2>{{ $mapnames_current[1] }}</h2>
<h3>Ranked:</h3>
<h2>{{ $mapnames_current[2] }}</h2>
<h2>{{ $mapnames_current[3] }}</h2>
</div>
I'm not sure what's going wrong here. Shouldn't the $mapnames_current variable be accessible everywhere?

Answer 1

Global variables aren't synced between client and server. The only thing passed between the client and server from a task is the return values of a task. (Which should be something that can be serialized to json (or date types in json)).
There's a good screencast on tasks here: http://datamelon.io/blog/2015/creating-volt-task-objects.html