Adding/deleting nutrients on ingredient form working

app/models/ingredient.rb

@@ -5,7 +5,7 @@ class Ingredient < ActiveRecord::Base
 
   belongs_to :project
   has_many :nutrients
-  accepts_nested_attributes_for :nutrients
+  accepts_nested_attributes_for :nutrients, allow_destroy: true
 
   validates :project, associated: true
   validates :name, presence: true, uniqueness: {scope: :project_id}