Data not persisted between steps in wizard - ruby-on-rails

Question

I have followed Nicolas Blanco's tutorial to make a "goal" wizard for my app.
There are two steps in the wizard. The first consisting of the form fields "name", "description" and "plan", the second has "deadline", which is a datetimepicker, "reporting frequency" and "days missed tolerance".
It seems to work when I click continue in the first step, but on clicking finish in the second step, the object #goal_wizard doesn't seem to include the parameters from the first step.
My goal.rb:
module Wizard
module Goal
STEPS = %w(step1 step2).freeze
class Base
include ActiveModel::Model
attr_accessor :goal
delegate *::Goal.attribute_names.map { |attr| [attr, "#{attr}="] }.flatten, to: :goal
def initialize(goal_attributes)
#goal = ::Goal.new(goal)
end
end
class Step1 < Base
validates :name, presence: true, length: { maximum: 50 }
validates :description, presence: true, length: { maximum: 300 }
validates :plan, presence: true, length: { maximum: 1000 }
end
class Step2 < Step1
validates :reporting_frequency, presence: true,
numericality: { greater_than_or_equal_to: 0 }
validates :days_missed_tolerance, presence: true,
numericality: { greater_than_or_equal_to: 0}
validates :deadline, presence: true
end
end
end
wizards_controller.rb:
class WizardsController < ApplicationController
before_action :load_goal_wizard, except: :validate_step
def validate_step
current_step = params[:current_step]
#goal_wizard = wizard_goal_for_step(current_step)
#goal_wizard.goal.attributes = goal_wizard_params
session[:goal_attributes] = #goal_wizard.goal.attributes
if #goal_wizard.valid?
next_step = wizard_goal_next_step(current_step)
create and return unless next_step
redirect_to action: next_step
else
render current_step
end
end
def create
# #user = current_user
# #goal = #user.goals.new(#goal_wizard.goal)
if #goal_wizard.goal.save
session[:goal_attributes] = nil
redirect_to root_path, notice: 'Goal succesfully created!'
else
redirect_to({ action: Wizard::Goal::STEPS.first }, alert: 'There were a problem creating the goal.')
end
end
private
def load_goal_wizard
#goal_wizard = wizard_goal_for_step(action_name)
end
def wizard_goal_next_step(step)
Wizard::Goal::STEPS[Wizard::Goal::STEPS.index(step) + 1]
end
def wizard_goal_for_step(step)
raise InvalidStep unless step.in?(Wizard::Goal::STEPS)
"Wizard::Goal::#{step.camelize}".constantize.new(session[:goal_attributes])
end
def goal_wizard_params
params.require(:goal_wizard).permit(:name, :description, :plan, :deadline, :reporting_frequency, :days_missed_tolerance)
end
class InvalidStep < StandardError; end
end
step1.html.erb:
<ol class="breadcrumb">
<li class='active'>Step 1</li>
<li>Step 2</li>
</ol>
<%= form_for #goal_wizard, as: :goal_wizard, url: validate_step_wizard_path do |f| %>
<%= render "error_messages" %>
<%= hidden_field_tag :current_step, 'step1' %>
<%= f.label :name %>
<%= f.text_field :name, class: "form_control" %>
<%= f.label :description %>
<%= f.text_field :description, class: "form_control" %>
<%= f.label :plan %>
<%= f.text_field :plan, class: "form_control" %>
<%= f.submit 'Continue', class: "btn btn-primary" %>
<% end %>
step2.html.erb:
<ol class="breadcrumb">
<li><%= link_to "Step 1", step1_wizard_path %></li>
<li class="active">Step 2</li>
</ol>
<%= form_for #goal_wizard, as: :goal_wizard, url: validate_step_wizard_path do |f| %>
<%= render "error_messages" %>
<%= hidden_field_tag :current_step, 'step2' %>
<%= f.label :deadline %>
<div class='input-group date' id='datetimepicker1'>
<%= f.text_field :deadline, class: "form-control" %>
<span class="input-group-addon">
<span class="glyphicon glyphicon-calendar"></span>
</span>
</div>
<%= f.label "How often do I want to report? (1 = every day)" %>
<%= f.number_field :reporting_frequency, class: "form_control" %>
<%= f.label "How many times can I miss my report?" %>
<%= f.number_field :days_missed_tolerance, class: "form_control" %>
<script type="text/javascript">
$(function () {
$('#datetimepicker1').datetimepicker({
minDate:new Date()
});
});
</script>
<%= f.submit "Finish", class: "btn btn-primary" %>
<% end %>

Answer 1

Over here you're passing the goal_attributes to initialize, but you're never using them.
def initialize(goal_attributes)
#goal = ::Goal.new(goal)
end
If you look at Nicolas Blanco's code he doesn't make that mistake.