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  • Publishing ICalendar with Ruby on Rails

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    If your application has certain events(For example meeting etc), then you may need to integrate calendar application.
    Icalendar is a standard for calendar data exchange.
    Icalendar allows us to generate .ics files so that users can add events to their calendars.


    First of all install the gem

    gem install icalendar

     

    And run bundle install
    After this add require 'icalendar' to your config/environment.rb

    Suppose we have a MeetingEvent model:

    class MeetingEvent < ActiveRecord::Base
    
    # Table name: meeings_events
    #
    #  id           :integer(11)     not null, primary key
    #  title        :string(255)
    #  start_date    :datetime
    #  end_date     :datetime
    #  summary      :text
    #  created_at   :datetime
    #  updated_at   :datetime
    end

     

    The next part is added "to_icalender" action of the MeetingController to accept .ics format:

    def to_icalender
            @event = MeetingEvent.find(params[:id])
            respond_to do |format|
              format.html
              format.ics do
                cal = Icalendar::Calendar.new           
                    event = Icalendar::Event.new
                    event.dtstart = @event.starts_at
                    event.dtend = @event.ends_at  
                    event.summary = @event.title
                    event.uid = event.url = "#{event_url}"
                    cal.add_event(event)            
                    cal.publish
                    render :text =>  cal.to_ical
              end
            end
        end


    Add a link to your view:

    <%= link_to @event.title, :controller => 'meeting', :action => :to_icalender, :format => :ics %>

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