Exclude certain values from remixing

app/models/grid_character.rb

@@ -12,34 +12,46 @@ class GridCharacter < ApplicationRecord
   validate :over_mastery_hp, on: :update
   validate :over_mastery_attack_matches_hp, on: :update
 
+  ##### Amoeba configuration
+  amoeba do
+    nullify :ring1
+    nullify :ring2
+    nullify :ring3
+    nullify :ring4
+    nullify :earring
+    nullify :perpetuity
+  end
+
   def awakening_level
-    unless awakening.nil?
-      errors.add(:awakening, 'awakening level too low') if awakening["level"] < 1
-      errors.add(:awakening, 'awakening level too high') if awakening["level"] > 9
-    end
+    return if awakening.nil?
+
+    errors.add(:awakening, 'awakening level too low') if awakening['level'] < 1
+    errors.add(:awakening, 'awakening level too high') if awakening['level'] > 9
   end
 
   def transcendence
     errors.add(:transcendence_step, 'character has no transcendence') if transcendence_step > 0 && !character.ulb
     errors.add(:transcendence_step, 'transcendence step too high') if transcendence_step > 5 && character.ulb
     errors.add(:transcendence_step, 'transcendence step too low') if transcendence_step < 0 && character.ulb
-
   end
 
   def over_mastery_attack
-    errors.add(:ring1, 'invalid value') unless ring1["modifier"].nil? || atk_values.include?(ring1["strength"])
+    errors.add(:ring1, 'invalid value') unless ring1['modifier'].nil? || atk_values.include?(ring1['strength'])
   end
 
   def over_mastery_hp
-    unless ring2["modifier"].nil?
-      errors.add(:ring2, 'invalid value') unless hp_values.include?(ring2["strength"])
-    end
+    return if ring2['modifier'].nil?
+
+    errors.add(:ring2, 'invalid value') unless hp_values.include?(ring2['strength'])
   end
 
   def over_mastery_attack_matches_hp
-    unless ring1[:modifier].nil? && ring2[:modifier].nil?
-      errors.add(:over_mastery, 'over mastery attack and hp values do not match') unless ring2[:strength] == (ring1[:strength] / 2)
-    end
+    return if ring1[:modifier].nil? && ring2[:modifier].nil?
+
+    return if ring2[:strength] == (ring1[:strength] / 2)
+
+    errors.add(:over_mastery,
+               'over mastery attack and hp values do not match')
   end
 
   def character

app/models/grid_weapon.rb

@@ -13,6 +13,14 @@ class GridWeapon < ApplicationRecord
   validate :compatible_with_position, on: :create
   validate :no_conflicts, on: :create
 
+  ##### Amoeba configuration
+  amoeba do
+    nullify :ax_modifier1
+    nullify :ax_modifier2
+    nullify :ax_strength1
+    nullify :ax_strength2
+  end
+
   # Helper methods
   def blueprint
     GridWeaponBlueprint

app/models/party.rb

@@ -60,8 +60,6 @@ class Party < ApplicationRecord
 
   ##### Amoeba configuration
   amoeba do
-    enable
-
     nullify :description
     nullify :shortcode