Refactor price db structure

#475

db/migrate/20170423210622_change_price_price_cents_type_to_integer.rb

@@ -0,0 +1,5 @@
+class ChangePricePriceCentsTypeToInteger < ActiveRecord::Migration
+  def change
+    change_column :prices, :price_cents, 'integer USING CAST(price_cents AS integer)'
+  end
+end

db/migrate/20170423214500_remove_price_price_currency.rb

@@ -0,0 +1,5 @@
+class RemovePricePriceCurrency < ActiveRecord::Migration
+  def change
+    remove_column :prices, :price_currency, :string
+  end
+end

db/migrate/20170423222302_remove_price_price_cents_default.rb

@@ -0,0 +1,5 @@
+class RemovePricePriceCentsDefault < ActiveRecord::Migration
+  def change
+    change_column_default :prices, :price_cents, nil
+  end
+end

db/schema-read-only.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20170423151046) do
+ActiveRecord::Schema.define(version: 20170423222302) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -964,8 +964,7 @@ ActiveRecord::Schema.define(version: 20170423151046) do
   create_table "prices", force: :cascade do |t|
     t.string   "desc"
     t.string   "category"
-    t.decimal  "price_cents",        precision: 10, scale: 2, default: 0.0,   null: false
+    t.integer  "price_cents",        null: false
-    t.string   "price_currency",                              default: "EUR", null: false
     t.datetime "valid_from"
     t.datetime "valid_to"
     t.string   "creator_str"

db/structure.sql

@@ -2497,8 +2497,7 @@ CREATE TABLE prices (
     id integer NOT NULL,
     "desc" character varying,
     category character varying,
-    price_cents numeric(10,2) DEFAULT 0.0 NOT NULL,
+    price_cents integer NOT NULL,
-    price_currency character varying DEFAULT 'EUR'::character varying NOT NULL,
     valid_from timestamp without time zone,
     valid_to timestamp without time zone,
     creator_str character varying,
@@ -5175,3 +5174,9 @@ INSERT INTO schema_migrations (version) VALUES ('20170423145057');
 
 INSERT INTO schema_migrations (version) VALUES ('20170423151046');
 
+INSERT INTO schema_migrations (version) VALUES ('20170423210622');
+
+INSERT INTO schema_migrations (version) VALUES ('20170423214500');
+
+INSERT INTO schema_migrations (version) VALUES ('20170423222302');
+

doc/models_complete.svg

@@ -2006,8 +2006,7 @@
 <text text-anchor="start" x="3606.5" y="-668.8" font-family="Times,serif" font-size="14.00">id :integer</text>
 <text text-anchor="start" x="3606.5" y="-653.8" font-family="Times,serif" font-size="14.00">desc :string</text>
 <text text-anchor="start" x="3606.5" y="-638.8" font-family="Times,serif" font-size="14.00">category :string</text>
-<text text-anchor="start" x="3606.5" y="-623.8" font-family="Times,serif" font-size="14.00">price_cents :decimal</text>
+<text text-anchor="start" x="3606.5" y="-623.8" font-family="Times,serif" font-size="14.00">price_cents :integer</text>
-<text text-anchor="start" x="3606.5" y="-608.8" font-family="Times,serif" font-size="14.00">price_currency :string</text>
 <text text-anchor="start" x="3606.5" y="-593.8" font-family="Times,serif" font-size="14.00">valid_from :datetime</text>
 <text text-anchor="start" x="3606.5" y="-578.8" font-family="Times,serif" font-size="14.00">valid_to :datetime</text>
 <text text-anchor="start" x="3606.5" y="-563.8" font-family="Times,serif" font-size="14.00">creator_str :string</text>