Add environment task

Rakefile

@@ -1,5 +1,3 @@
-require_relative 'config/environment'
-
 Dir.glob('lib/tasks/*.rake').each { |r| import r }
 
 task :default => [:test]

lib/tasks/db.rake

@@ -1,6 +1,6 @@
 namespace :db do
   desc 'Run database migrations'
-  task :migrate do
+  task migrate: :environment do
     Sequel.extension(:migration)
     db = Sequel::DATABASES.first
     dir = App.root.join('db/migrate')

lib/tasks/environment.rake

@@ -0,0 +1,3 @@
+task :environment do
+  require './config/environment'
+end

lib/tasks/rates.rake

@@ -1,16 +1,18 @@
-require 'currency'
-require 'fixer'
-
 namespace :rates do
+  task setup: :environment do
+    require 'currency'
+    require 'fixer'
+  end
+
   desc 'Reload all rates'
-  task :reload do
-    Currency.delete
+  task reload: :setup do
+    Currency.dataset.delete
     data = Fixer::Feed.new(:historical)
     Currency.multi_insert(data.to_a)
   end
 
   desc 'Update rates'
-  task :update do
+  task update: :setup do
     Fixer::Feed.new.each do |hsh|
       Currency.find_or_create(hsh)
     end

lib/tasks/test.rake

@@ -1,6 +1,6 @@
 require 'rake/testtask'
 
-Rake::TestTask.new do |t|
+Rake::TestTask.new(test: :environment) do |t|
   t.libs.push('lib')
   t.test_files = FileList['spec/*_spec.rb']
 end