Rails: How to review content before submit/save? - ruby-on-rails

Question

I know it is simple but I can't get my head around a solution.
It is a job board site. Lets say it's functionality similar to this site. When a user fill all required information and click "To next step" or "Preview", another page loads with all filled data. That page is similar to the final page when data is saved.
When user on preview page, it can go forward and submit the page (in this case it will be saved to DB). Or, click back to Edit the job.
I tried the following::
Within _form.html.erb I added a preview button
<%= f.submit "Preview", :name => 'preview' %>
Within JobControllers I altered create method
def create
if params[:preview]
#job = Job.new(jobs_params)
render 'jobs/preview'
else
#job.save
end
end
Created a Preview view /jobs/preview.html.erb
Now I have 2 problems.
1- Within my preview page, I have an edit button like so: <%= link_to "Edit Job", edit_job_path(#job) %>. But I have an error because I can't find #job. Error says: No route matches {:action=>"edit", :controller=>"jobs", :id=>nil} missing required keys: [:id]
SOLUTION Changed like to <%= link_to 'Back to edit', 'javascript:history.go(-1);' %>
2- How I would submit and add to my DB all information on preview page?
Thank you.

Answer 1

Once I've given a similar task. What I've done is to save records, but not to publish. In my index (resource listing) action of relevant controller, I only fetch published records. Also show action prechecks if that record's published attribute is set to true.
What was my model/controllers looked like before
#model
class Book < ActiveRecord::Base
...
scope :active, -> { where(published: true).some_other_queries }
self.active?
(published && some_other_requirements)
end
...
end
#controller
def index
#books = Book.active
...
end
def show
if #book.active?
render 'show'
...
else
...
end
end
First added a secret key for previews.
#model
def secret
#some custom random key generation
# e.g. Digest::MD5.hexdigest("#{id}_#{ENV['RAILS_SECRET']}")
end
Then added preview action to controller
def preview
# i don't check if the record is active.
# also added a security layer, to prevent irrelevant guys to view
# that record
if #book.secret == params[:secret]
render 'show'
else
...
end
end
In dashboard
...
= link_to "Preview", preview_book_path(book, secret: book.secret)
...
then added a member route
#routes
resources :books do
get :preview, on: :member
end

Answer 2

When I have to do something like this what I normally do is create a review table in my app. This table looks just like the table that is going to saving to.
When they press the "Approved" or "Save" button just populate the new table with the proper data.
I like to create a routes to handle this
resources :something do
match 'move_to_something_else' => 'somethings#move_to_something_else', as: :move_to_something_else, via: :all
end
Now on the controller we can do the following:
def move_to_something_else
#something = Something.find(params[:id])
#something_else = SomethingElse.new
#something_else.name = #something.name
....
#something_else.save
redirect_to something_else_path(#something_else)
end
Alternative you could add a state to your table with the default value of 'draft'
# config/routes.rb
resources :something do
match 'published' => 'somethings#published', as: :published, via: :all
end
# Controller
def published
#something = Something.find(params[:id])
#something.state = 'published'
#something.save
redirect_to something_path(#something)
end