Measurement/readouts WIP

app/models/ingredient.rb

@@ -37,6 +37,10 @@ class Ingredient < ActiveRecord::Base
     end
   end
 
+  def toggle_hidden!
+    self.toggle!(:hidden)
+  end
+
   def self.filter(project, filters = {}, requested_q = Quantity.none)
     ingredients = all
 

app/models/measurement.rb

@@ -1,2 +1,29 @@
 class Measurement < ActiveRecord::Base
+  belongs_to :project, required: true
+  belongs_to :source, required: false
+
+  has_many :readouts, inverse_of: :measurement, dependent: :destroy, validate: true
+  validates :readouts, presence: true
+  accepts_nested_attributes_for :readouts, allow_destroy: true, reject_if: proc { |attrs|
+    attrs['quantity_id'].blank?
+  }
+  # Readout (quantity_id, unit_id) pair uniqueness check for nested attributes
+  validate do
+    quantities = self.readouts.map { |r| [r.quantity_id, r.unit_id] }
+    if quantities.length != quantities.uniq.length
+      errors.add(:readouts, :duplicated_quantity)
+    end
+  end
+
+  validates :name, presence: true, uniqueness: {scope: :project_id}
+
+  after_initialize do
+    if new_record?
+      self.hidden = false if self.hidden.nil?
+    end
+  end
+
+  def toggle_hidden!
+    self.toggle!(:hidden)
+  end
 end

app/models/readout.rb

@@ -1,2 +1,7 @@
 class Readout < ActiveRecord::Base
+  belongs_to :measurement, inverse_of: :readouts, required: true
+  belongs_to :quantity, required: true
+  belongs_to :unit, required: true
+
+  validates :quantity, uniqueness: {scope: [:ingredient_id, :unit_id]}
 end