Removed ITEM_TYPES in favor of uniformly named scopes/attributes

app/models/food.rb

@@ -16,12 +16,16 @@ class Food < ActiveRecord::Base
   belongs_to :ref_unit, class_name: 'Unit', required: true
   belongs_to :source, required: false
   has_many :ingredients, dependent: :restrict_with_error
+  has_many :nutrients, foreign_key: 'registry_id', inverse_of: :food, dependent: :destroy,
+    validate: true
+
+  DOMAIN = :diet
+  alias_attribute :subitems, :nutrients
+  scope :subitems, -> { includes(nutrients: [:quantity, :unit]) }
 
-  has_many :nutrients, inverse_of: :food, dependent: :destroy, validate: true
   validates :nutrients, presence: true
-  accepts_nested_attributes_for :nutrients, allow_destroy: true, reject_if: proc { |attrs|
-    attrs['quantity_id'].blank? && attrs['amount'].blank?
-  }
+  accepts_nested_attributes_for :nutrients, allow_destroy: true,
+    reject_if: proc { |attrs| attrs['quantity_id'].blank? && attrs['amount'].blank? }
   # Nutrient quantity_id uniqueness check for nested attributes
   validate do
     quantities = self.nutrients.reject { |n| n.marked_for_destruction? }

app/models/ingredient.rb

@@ -2,6 +2,11 @@ class Ingredient < ActiveRecord::Base
   belongs_to :composition, inverse_of: :ingredients, polymorphic: true, required: true
   belongs_to :food, required: true
   belongs_to :part_of, required: false
+  has_many :nutrients, through: :food, source: :nutrients
+
+  DOMAIN = :diet
+  alias_attribute :subitems, :nutrients
+  scope :subitems, -> { includes(nutrients: [:quantity, :unit]) }
 
   validates :ready_ratio, numericality: {greater_than_or_equal_to: 0.0}
   validates :amount, numericality: {greater_than_or_equal_to: 0.0}

app/models/measurement.rb

@@ -1,19 +1,22 @@
 class Measurement < ActiveRecord::Base
   belongs_to :routine, required: true, inverse_of: :measurements,
     class_name: 'MeasurementRoutine'
-  accepts_nested_attributes_for :routine, allow_destroy: true, reject_if: proc { |attrs|
-    attrs['name'].blank?
-  }
-  after_destroy { self.routine.destroy if self.routine.measurements.empty? }
-  has_one :project, through: :routine
-
   belongs_to :source, required: false
+  has_one :project, through: :routine
+  has_many :readouts, foreign_key: 'registry_id', inverse_of: :measurement,
+    dependent: :destroy, validate: true
+
+  DOMAIN = :measurement
+  alias_attribute :subitems, :readouts
+  scope :subitems, -> { includes(readouts: [:quantity, :unit]) }
+
+  accepts_nested_attributes_for :routine, allow_destroy: true,
+    reject_if: proc { |attrs| attrs['name'].blank? }
+  after_destroy { self.routine.destroy if self.routine.measurements.empty? }
 
-  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? && attrs['value'].blank?
-  }
+  accepts_nested_attributes_for :readouts, allow_destroy: true,
+    reject_if: proc { |attrs| attrs['quantity_id'].blank? && attrs['value'].blank? }
   # Readout quantity_id + unit_id uniqueness validation. Cannot be effectively
   # checked on Readout model level.
   validate do

app/models/nutrient.rb

@@ -1,9 +1,10 @@
 class Nutrient < QuantityValue
-  belongs_to :food, inverse_of: :nutrients, required: true
+  belongs_to :food, foreign_key: 'registry_id', inverse_of: :nutrients, required: true
 
-  validates :value, numericality: {greater_than_or_equal_to: 0.0}
   # Uniqueness NOT validated here, see Value for explanation
   #validates :quantity, uniqueness: {scope: :food_id}
+  validates :value, numericality: {greater_than_or_equal_to: 0.0}
 
   alias_attribute :amount, :value
+  delegate :ref_amount, to: :food
 end

app/models/readout.rb

@@ -1,7 +1,7 @@
 class Readout < QuantityValue
-  belongs_to :measurement, inverse_of: :readouts, required: true
+  belongs_to :measurement, foreign_key: 'registry_id', inverse_of: :readouts, required: true
 
-  validates :value, numericality: true
   # Uniqueness NOT validated here, see Value for explanation
   #validates :quantity, uniqueness: {scope: [:measurement_id, :unit_id]}
+  validates :value, numericality: true
 end