Add support for PG interval field

app/controllers/admin/billing/prices_controller.rb

@@ -40,7 +40,6 @@ module Admin
 
       def create
         @price = ::Billing::Price.new(price_params)
-
         if @price.save
           flash[:notice] = t('.created')
           redirect_to_index
@@ -50,7 +49,7 @@ module Admin
       end
 
       def update
-        if @price.update_attributes(price_params)
+        if @price.update(price_params.compact_blank)
           flash[:notice] = t('.updated')
           redirect_to_index
         else
@@ -81,7 +80,9 @@ module Admin
           valid_to
         ]
 
-        params.require(:price).permit(*allowed_params)
+        allowed = params.require(:price).permit(*allowed_params)
+        allowed[:duration] = ActiveSupport::Duration.build(allowed[:duration].to_i) if allowed[:duration]
+        allowed
       end
 
       def search_params
@@ -104,8 +105,7 @@ module Admin
       end
 
       def durations
-        durations = ::Billing::Price::durations
-        durations.collect { |duration| [duration.sub('mon', 'month'), duration] }
+        ::Billing::Price::durations
       end
 
       def statuses

app/models/billing/price.rb

@@ -1,5 +1,6 @@
 module Billing
   class Price < ApplicationRecord
+    attribute :duration, :interval
     include Billing::Price::Expirable
     include Versions
 
@@ -8,33 +9,37 @@ module Billing
 
     validates :price, :valid_from, :operation_category, :duration, presence: true
     validates :operation_category, inclusion: { in: Proc.new { |price| price.class.operation_categories } }
-    validates :duration, inclusion: { in: Proc.new { |price| price.class.durations } }
+    validates :duration, inclusion: { in: Proc.new { |price| price.class.durations.values } }, if: :should_validate_duration?
 
     alias_attribute :effect_time, :valid_from
     alias_attribute :expire_time, :valid_to
     monetize :price_cents, allow_nil: true, numericality: { greater_than_or_equal_to: 0 }
     after_initialize :init_values
 
+    def should_validate_duration?
+      new_record? || duration_changed?
+    end
+
     def self.operation_categories
       %w[create renew]
     end
 
     def self.durations
-      [
-        '3 mons',
-        '6 mons',
-        '9 mons',
-        '1 year',
-        '2 years',
-        '3 years',
-        '4 years',
-        '5 years',
-        '6 years',
-        '7 years',
-        '8 years',
-        '9 years',
-        '10 years',
-      ]
+      {
+        '3 months' => 3.months,
+        '6 months' => 6.months,
+        '9 months' => 9.months,
+        '1 year' => 1.year,
+        '2 years'=> 2.years,
+        '3 years'=> 3.years,
+        '4 years'=> 4.years,
+        '5 years'=> 5.years,
+        '6 years'=> 6.years,
+        '7 years'=> 7.years,
+        '8 years'=> 8.years,
+        '9 years'=> 9.years,
+        '10 years'=> 10.years,
+      }
     end
 
     def self.statuses

app/views/admin/billing/prices/_price.html.erb

@@ -1,6 +1,6 @@
 <tr class="price">
     <td><%= link_to price.zone_name, edit_admin_price_path(price), class: 'edit-price-btn' %></td>
-    <td><%= price.duration.sub('mons', 'months') %></td>
+    <td><%= price.duration %></td>
     <td><%= price.operation_category %></td>
     <td><%= number_to_currency price.price %></td>
     <td><%= l price.valid_from, format: :date %></td>