adding event functionality to my redmine calendar using bitnami stack - ruby

Question

I want to add, update and delete event on my redmine calendar(almost similar to a google calendar).I have installed redmine on a Bitnami stack. But I'm not able to understand the code structure as I do not have proper documentation. Is there anyone who can help me on this.
The below listed code is my calendar controller .
class CalendarsController < ApplicationController
menu_item :calendar
before_action :find_optional_project
rescue_from Query::StatementInvalid, :with => :query_statement_invalid
helper :issues
helper :projects
helper :queries
include QueriesHelper
def show
if params[:year] and params[:year].to_i > 1900
#year = params[:year].to_i
if params[:month] and params[:month].to_i > 0 and params[:month].to_i < 13
#month = params[:month].to_i
end
end
#year ||= User.current.today.year
#month ||= User.current.today.month
#calendar = Redmine::Helpers::Calendar.new(Date.civil(#year, #month, 1), current_language, :month)
retrieve_query
#query.group_by = nil
#query.sort_criteria = nil
if #query.valid?
events = []
events += #query.issues(:include => [:tracker, :assigned_to, :priority],
:conditions => ["((start_date BETWEEN ? AND ?) OR (due_date BETWEEN ? AND ?))", #calendar.startdt, #calendar.enddt, #calendar.startdt, #calendar.enddt]
)
events += #query.versions(:conditions => ["effective_date BETWEEN ? AND ?", #calendar.startdt, #calendar.enddt])
#calendar.events = events
end
render :action => 'show', :layout => false if request.xhr?
end
end
The below is the calender_helper.rb
module CalendarsHelper
def link_to_previous_month(year, month, options={})
target_year, target_month = if month == 1
[year - 1, 12]
else
[year, month - 1]
end
name = if target_month == 12
"#{month_name(target_month)} #{target_year}"
else
"#{month_name(target_month)}"
end
# \xc2\xab(utf-8) = «
link_to_month(("\xc2\xab " + name), target_year, target_month, options)
end
def link_to_next_month(year, month, options={})
target_year, target_month = if month == 12
[year + 1, 1]
else
[year, month + 1]
end
name = if target_month == 1
"#{month_name(target_month)} #{target_year}"
else
"#{month_name(target_month)}"
end
# \xc2\xbb(utf-8) = »
link_to_month((name + " \xc2\xbb"), target_year, target_month, options)
end
def link_to_month(link_name, year, month, options={})
link_to(link_name, {:params => request.query_parameters.merge(:year => year, :month => month)}, options)
end
end
Below is the view ,show.html.erb
<h2><%= #query.new_record? ? l(:label_calendar) : #query.name %></h2>
<%= form_tag({:controller => 'calendars', :action => 'show', :project_id => #project},
:method => :get, :id => 'query_form') do %>
<%= hidden_field_tag 'set_filter', '1' %>
<fieldset id="filters" class="collapsible <%= #query.new_record? ? "" : "collapsed" %>">
<legend onclick="toggleFieldset(this);"><%= l(:label_filter_plural) %></legend>
<div style="<%= #query.new_record? ? "" : "display: none;" %>">
<%= render :partial => 'queries/filters', :locals => {:query => #query} %>
</div>
</fieldset>
<p style="float:right;">
<%= link_to_previous_month(#year, #month, :accesskey => accesskey(:previous)) %> | <%= link_to_next_month(#year, #month, :accesskey => accesskey(:next)) %>
</p>
<p class="buttons">
<%= label_tag('month', l(:label_month)) %>
<%= select_month(#month, :prefix => "month", :discard_type => true) %>
<%= label_tag('year', l(:label_year)) %>
<%= select_year(#year, :prefix => "year", :discard_type => true) %>
<%= link_to_function l(:button_apply), '$("#query_form").submit()', :class => 'icon icon-checked' %>
<%= link_to l(:button_clear), { :project_id => #project, :set_filter => 1 }, :class => 'icon icon-reload' %>
</p>
<% end %>
<%= error_messages_for 'query' %>
<% if #query.valid? %>
<%= render :partial => 'common/calendar', :locals => {:calendar => #calendar} %>
<%= call_hook(:view_calendars_show_bottom, :year => #year, :month => #month, :project => #project, :query => #query) %>
<p class="legend cal">
<span class="starting"><%= l(:text_tip_issue_begin_day) %></span>
<span class="ending"><%= l(:text_tip_issue_end_day) %></span>
<span class="starting ending"><%= l(:text_tip_issue_begin_end_day) %></span>
</p>
<% end %>
<% content_for :sidebar do %>
<%= render :partial => 'issues/sidebar' %>
<% end %>
<% html_title(l(:label_calendar)) -%>
This is the only code related to calendar in routes.rb
get '/projects/:project_id/issues/calendar', :to => 'calendars#show', :as => 'project_calendar'
get '/issues/calendar', :to => 'calendars#show'

Answer 1

In this controller you have only show action (HTTP GET). If you want update and delete you are supposed to add methods and logic for them gere. You will also need routes in config/routes.rb.
I would also recommend you to take a look into other controllers since this one looks more like a renderer of the calendar and nothing more. I don't see create action as well (HTTP POST) which means you create the entity somewhere else and update and delete are supposed to be there as well (if they are not defined already).