How to search by date range - ruby-on-rails-4

Question

I'm still learning in RoR and I have a problem to search table column (period) by date range (start_period, end_period). This is my code :
promotions_controller
def search
#promotions = Promotion.search(params)
respond_to do |format|
format.js
end
end
index.html.erb - promotions
<%= form_tag search_promotions_path, class: "form-horizontal bucket-form", remote: true do %>
<div class="col-md-6">
<div class="form-group">
<td>Periode</td>
<div class="input-group input-large">
<%= text_field_tag 'start_period','', class: "form-control dpd1" %>
<span class="input-group-addon">To</span>
<%= text_field_tag 'end_period','', class: "form-control dpd1" %>
</div>
</div>
</div>
<% end %>
promotion.rb
def self.search(params)
promotions = Promotion.all
????
end
I have tried to create a code for (start_period) & (end_period) in my model. But I have failed :( Can you give me a solution for my problem? Thanks

Answer 1

Try the following method:
def self.search(start_period, end_period)
Promotion.where("start_period >= ? AND end_period <= ?", start_period, end_period)
end
If you place these records on your seeds file (rake db:seed):
Promotion.create!([
{name: 'p1', start_period: DateTime.new(2001), end_period: DateTime.new(2002)},
{name: 'p2', start_period: DateTime.new(2001), end_period: DateTime.new(2003)},
{name: 'p3', start_period: DateTime.new(2008), end_period: DateTime.new(2009)}
])
And execute
Promotion.search(DateTime.new(1999), DateTime.new(2004)) # returns p1 & p2