Promotion/bubble-wrap TableScreen data - rubymotion

Question

I'm stuck on this:
I need to populate data into my app.
I'm using Promotion for the very first time....
Without ProMotion I use to fetch the data in the init method
Now my code looks like below:
class Parties < ProMotion::TableScreen
attr_accessor :_cells
#news = []
include MyUiModules
title 'Yazarlar'
refreshable callback: :on_refresh,
pull_message: "Pull to refresh",
refreshing: "Refreshing data…",
updated_format: "Last updated at %s",
updated_time_format: "%l:%M %p"
def on_refresh
#MyItems.pull_from_server do |items|
##my_items = items
end_refreshing
#update_table_data
# end
end
def table_data
_cells = []
[{
title: nil,
cells: create_cells(_cells)
}]
end
def will_appear
Barbutton.create_bar(self)
set_attributes self.view, {
backgroundColor: hex_color("DBDBDB")
}
end
def go_to_next
App.delegate.slide_menu.show_menu
end
def create_cells(_cells)
BW::HTTP.get(URL) do |response|
json = BW::JSON.parse response.body.to_str
for line in json
_cells << { title: line["val_for_title"]}
end
end
_cells
end
end
Unfotunately this does return an empty array, and I can't figure out how to solve it.
Thx for your help

Answer 1

You can't do that because BW::HTTP.get is asynchronous !
Instead try something like this:
def on_init
#data = []
end
def table_data
[
{
title: nil,
cells: #data
}
]
end
def on_refresh
BW::HTTP.get(URL) do |response|
#data = []
json = BW::JSON.parse(response.body.to_str)
json.each do |hash|
#data << { title: hash["val_for_title"]}
end
update_table_data
end_refreshing
end
end
Hope it helps :-)