Differentiate Past Events from Future Events - ruby-on-rails

Question

QUESTION: How do I show events that have start_time<time.now & start_time>time.now in two different tables?
I have scaffold event start_time:datetime title
Events_controller:
def index
#event = Event.all
end
index.html.haml:
%table
%thead
%tr
%th Start_time
%th Title
%tbody
- #events.each do |event|
%tr
%td= event.start_time
%td= event.title
thank you:)

Answer 1

You may simply define scopes for the past and future events:
class Event < ActiveRecord::Base
scope :in_the_past, { where('start_time < ?', Time.now }
scope :in_the_future, { where('start_time > ?', Time.now }
end
Then your views will be:
_events_table.html.haml
%table
%thead
%tr
%th Start_time
%th Title
%tbody
- events.find_each do |event|
%tr
%td= event.start_time
%td= event.title
index.html.haml
/ Past events
= render 'events_table', events: Event.in_the_past
/ Future events
= render 'events_table', events: Event.in_the_future

Answer 2

Use Enumerable#partition to divide your events into buckets.
past, future = Event.all.partition { |e| e.start_time < Time.now }

Answer 3

This could be a possible solution. with two query...
Controller
def index
#upcoming_events = Event.where("start_time > ?", Time.now)
#past_events = Event.where("start_time < ?", Time.now)
end
View
%table
%thead
%tr
%th Start_time
%th Title
%tbody
- #upcoming_events.each do |event|
%tr
%td= event.start_time
%td= event.title
%table
%thead
%tr
%th Start_time
%th Title
%tbody
- #past_events.each do |event|
%tr
%td= event.start_time
%td= event.title

Answer 4

If you are not bothering about performance and you're ok with 2 SQL queries, then I'd suggest something like that:
def index
#past_events = Event.where('start_time < ?', Time.zone.now)
#future_events = Event.where('start_time > ?', Time.zone.now)
end