Amit Solanki

Yesterday, I had an opportunity to explain ruby on rails basics to trainees at VinSol. Below is the presentation which I gave which may be helpful to anyone out there trying to learn and understand rails.

A presentation which I gave at VinSol on how to use God to monitor your applications.

The DHTML / JavaScript Calendar is a javascript library for creating customized calendars. The library has been ported as a rails plugin, dhtml calendar.

Using calendar_select from this plugin, I found that the date time fields were not being updated after I picked up a date from date select popup. I had to modify lines 27-35 in calendar.rb from

if show_field == :select
  input_field_year_id = "#{object}[#{method}(1i)]"
  input_field_month_id = "#{object}[#{method}(2i)]"
  input_field_day_id = "#{object}[#{method}(3i)]"
  if calendar_options.has_key?(:showsTime) and calendar_options[:showsTime]
    input_field_hour_id = "#{object}[#{method}(4i)]"
    input_field_minute_id = "#{object}[#{method}(5i)]"
  end
end

to

if show_field == :select
  input_field_year_id = "#{object}_#{method}_1i"
  input_field_month_id = "#{object}_#{method}_2i"
  input_field_day_id = "#{object}_#{method}_3i"
  if calendar_options.has_key?(:showsTime) and calendar_options[:showsTime]
    input_field_hour_id = "#{object}_#{method}_4i"
    input_field_minute_id = "#{object}_#{method}_5i"
  end
end

The plugin internally uses datetime_select and date_select to create year select with DOM id as “#{object}_#{method}_1i” and DOM name as “#{object}[#{method}(1i)]“. The DOM name variable was been referenced in the calendar.rb which did not update the fields when user tries to pick a date from popup. On changing this to DOM id variable, everything worked fine.