Added Targets table

Fixed Quantity#after_save for default quantities

app/models/quantity.rb

@@ -26,7 +26,8 @@ class Quantity < ActiveRecord::Base
   # be no other way to validate against newly changed :name
   after_save do
     next unless name_changed? || changes.empty?
-    formulas = project.formulas.where('formulas.code LIKE ?', "%#{name}%").includes(:quantity)
+    formulas = Formula.joins(:quantity).where(quantities: {project_id: project})
+      .where('formulas.code LIKE ?', "%#{name}%").includes(:quantity)
     next unless formulas.exists?
 
     quantity_names = formulas.reject(&:valid?)

db/migrate/001_create_schema.rb

@@ -92,5 +92,14 @@ class CreateSchema < ActiveRecord::Migration
       t.timestamp :taken_at
       t.timestamps null: false
     end
+
+    create_table :targets do |t|
+      t.references :goal
+      t.references :threshold
+      t.string :condition
+      t.string :scope
+      t.date :effective_from
+      t.timestamps null: false
+    end
   end
 end