I had written a small web app that gets the date(or any data) from a
external device and print it on screen(browser screen) continously
without refreshing the page.
I am using below form_tag inside view file
(myapp/app/views/index.html.erb):
<%= form_tag(channel_get_dates_path(@channel, :write => 1), :remote =>
true) do %>
<input type="submit" value="Get Today's Date">
<input id="get_date" type="text" value="<%=@write_date%>">
<% end %>
and javascript method in view file (myapp/app/views/create.js.erb):
$("#get_date").val("<%= @get_date %>")
Here, when i press the button it will call the method in controller and
display the date in text field without any page refresh.
My question, Is it possible to make the date to display in text field
continuously by pressing the button only once? I tried calling the
Controller method inside a loop and ended with Double render error. is
it correct way or to make changes in view file?
my controller file(maapp/app/controller/get_dates_controller.rb):
class GetDatesController < ApplicationController
include DateUtilities
before_filter :require_user, :set_channels_menu
def index
@channel = current_user.channels.find(params[:channel_id])
@write_date = @channel.get_dates.write_dates.first
end
def destroy
current_user.get_dates.find_by_get_date(params[:id]).try(:destroy)
redirect_to :back
end
def create
@channel =
current_user.channels.find(params[:channel_id])
@get_date = @channel.get_dates.write_dates.first
if (@get_date.nil?)
@get_date = GetDate.new
@get_date.channel_id = @channel.id
@get_date.user_id = current_user.id
@get_date.write_flag = params[:write]
end
@get_date.get_date = generate_get_date
respond_to do |format|
@get_date.save
format.html { redirect_to
channel_get_dates_path(@channel) }
format.js
end
end
end
and i have date generation file(myapp/app/lib/date_utilities) as:
module DateUtilities
def generate_get_date
require 'rubygems'
require 'socket'
hostname = '127.0.0.1'
port = 2000
streamSock = TCPSocket.new( hostname, port )
streamSock.write "ON"
while line = streamSock.gets
k = line
end
k
end
end
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