Slim model with Form object

profiles_controller.rb

class ProfilesController < ApplicationController
  def new
    @form = ProfileForm.new(current_user)
  end
  
  def create
    @form = ProfileForm.new(current_user, form_params)
    
    # Now your form can act like a model
    if @form.save
      flash[:success] = "This is successful"
      redirect_to :success
    else
      flash[:error] = "Please look into the errors"
      render :new
    end
  end
  
  private
  
  def form_params
    params.require(:profile_form).permit(
      user_attributes: [:name, :attributes_to_update],
      profile_attributes: [:country, :bio, :more_attributes_to_update]
    )
  end
end