Pattern for Form Objects in Rails

recipe_form.rb

class RecipeForm
  ATTRIBUTES = [:name, :cooking_time_minutes]
  
  attr_reader :recipe
  attr_accessor *ATTRIBUTES
  
  def initialize(recipe)
    @recipe = recipe
  end
  
  def assign_attributes(attributes)
    attributes.each do |k,v|
      send("#{attribute}=", v)
    end
  end
  
  def save
    ATTRIBUTES.each do |attribute|
      recipe.public_send("#{attribute}=", send(attribute))
    end
    
    recipe.save
  end
end

recipes_controller.rb

class RecipesController < ApplicationController
  def create
    @recipe_form = RecipeForm.new(Recipe.new)
    @recipe_form.assign_attributes(recipe_params)
    
    if @recipe_form.save
      redirect_to recipes_path
    else
      render :new
    end
  end
  
  def update
    recipe = Recipe.find(params[:id])
    @recipe_form = RecipeForm.new(recipe)
    
    if @recipe_form.update
      redirect_to recipes_path
    else
      render :edit
    end
  end
  
  private
  
  def recipe_params
    params.require(:recipe).permit(:name, :cooking_time_minutes)
  end
end