diff --git a/app/models/ingredient.rb b/app/models/ingredient.rb
new file mode 100644
index 0000000..700e9ec
--- /dev/null
+++ b/app/models/ingredient.rb
@@ -0,0 +1,2 @@
+class Ingredient < ActiveRecord::Base
+end
diff --git a/db/migrate/001_create_units.rb b/db/migrate/001_create_units.rb
index dcd45c0..7e9e856 100644
--- a/db/migrate/001_create_units.rb
+++ b/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
diff --git a/test/unit/ingredient_test.rb b/test/unit/ingredient_test.rb
new file mode 100644
index 0000000..92597c2
--- /dev/null
+++ b/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