Change pricelists.duration column type to interval

#475

db/migrate/20170422162824_change_pricelist_duration_type_to_interval.rb

@@ -0,0 +1,7 @@
+class ChangePricelistDurationTypeToInterval < ActiveRecord::Migration
+  def change
+    execute <<-SQL
+      ALTER TABLE pricelists ALTER COLUMN duration TYPE interval USING (trim(duration)::interval)
+    SQL
+  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: 20170422142116) do
+ActiveRecord::Schema.define(version: 20170422162824) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"

db/structure.sql

@@ -2542,7 +2542,7 @@ CREATE TABLE pricelists (
     updator_str character varying,
     created_at timestamp without time zone NOT NULL,
     updated_at timestamp without time zone NOT NULL,
-    duration character varying,
+    duration interval,
     operation_category character varying
 );
 
@@ -5221,3 +5221,5 @@ INSERT INTO schema_migrations (version) VALUES ('20170422130054');
 
 INSERT INTO schema_migrations (version) VALUES ('20170422142116');
 
+INSERT INTO schema_migrations (version) VALUES ('20170422162824');
+