parsley/app/controllers/ingredients_controller.rb

class IngredientsController < ApplicationController

  def search
    @ingredients = Food.search(params[:query]).order(:name).to_a
    @ingredients.concat(Recipe.is_ingredient.search_by_name(params[:query]).order(:name).to_a)
    @ingredients.sort { |a, b| a.name <=> b.name }
    
    json = @ingredients.map do |i|
      {
          id: i.ingredient_id,
          ingredient_id: i.ingredient_id,
          name: i.name,
          density: i.density
      }
    end

    render json: json
  end
end