Added Ingredients model

command: rails generate redmine_plugin_model body_tracking ingredient
name:string ref_unit:references ref_amount:decimal hidden:boolean
source:references group:integer

app/models/ingredient.rb

@@ -0,0 +1,2 @@
+class Ingredient < ActiveRecord::Base
+end

db/migrate/001_create_units.rb

@@ -1,17 +1,30 @@
 class CreateUnits < ActiveRecord::Migration
   def change
     create_table :units do |t|
-      t.references :project
+      t.references :project, index: true, foreign_key: true
       t.string :name
       t.string :shortname
     end
+    add_index :units, :project_id
 
     create_table :quantities do |t|
-      t.references :project
+      t.references :project, index: true, foreign_key: true
       t.string :name
       t.string :description
       t.integer :domain
     end
+    add_index :quantities, :project_id
+
+    create_table :ingredients do |t|
+      t.string :name
+      t.references :ref_unit, index: true, foreign_key: true
+      t.decimal :ref_amount
+      t.boolean :hidden
+      t.references :source, index: true, foreign_key: true
+      t.integer :group
+    end
+    add_index :ingredients, :ref_unit_id
+    add_index :ingredients, :source_id
 
     reversible do |dir|
       dir.up do

test/unit/ingredient_test.rb

@@ -0,0 +1,9 @@
+require File.expand_path('../../test_helper', __FILE__)
+
+class IngredientTest < ActiveSupport::TestCase
+
+  # Replace this with your real tests.
+  def test_truth
+    assert true
+  end
+end