DRY controller .valid? for create and update using simple_form - ruby-on-rails

Question

So I've got these views:
new.html.erb
<div class="booyah-box col-xs-10 col-xs-offset-1">
<h1>Expose Your Hidden Gem</h1>
<%= simple_form_for #place do |f| %>
<%= f.input :name, error: "Name is mandatory" %>
<%= f.input :address %>
<%= f.input :description %>
<br />
<%= f.submit 'Create', class: 'btn btn-primary' %>
<% end %>
</div>
edit.html.erb
<div class="booyah-box col-xs-10 col-xs-offset-1">
<h1>Edit Your Place</h1>
<%= simple_form_for #place do |f| %>
<%= f.input :name %>
<%= f.input :address %>
<%= f.input :description %>
<br />
<%= f.submit 'Update', class: 'btn btn-primary' %>
<% end %>
</div>
this model:
Place.rb
class Place < ActiveRecord::Base
belongs_to :user
has_many :comments, dependent: :destroy
has_many :photos
geocoded_by :address
after_validation :geocode
validates :name, presence: true
validates :address, presence: true
validates :description, presence: true
end
And finally, places_controller.rb (only showing create and update)
def create
#place = current_user.places.create(place_params)
if #place.save
redirect_to root_path
else
render :new
end
end
def update
#place = Place.find(params[:id])
if #place.user != current_user
return render text: 'Not Allowed', status: :forbidden
end
#place.update_attributes(place_params)
if #place.save
redirect_to root_path
else
render :edit
end
end
But, I'm trying to think DRY and want to know if there is a better way to do a validation for name address and description presence without having the same identical code in both the create and update portions of my controller? I feel like I should just be writing it once...

Answer 1

First, you can refactor your views to use the following structure:
# new.html.erb
<div class="booyah-box col-xs-10 col-xs-offset-1">
<h1>Expose Your Hidden Gem</h1>
<%= render 'form' %>
</div>
# edit.html.erb
<div class="booyah-box col-xs-10 col-xs-offset-1">
<h1>Edit Your Place</h1>
<%= render 'form' %>
</div>
# _form.html.erb
<%= simple_form_for #place do |f| %>
<%= f.input :name %>
<%= f.input :address %>
<%= f.input :description %>
<br />
<% submit_label = #place.new_record? ? 'Create' : 'Update' %>
<%= f.submit submit_label, class: 'btn btn-primary' %>
<% end %>
And then in your controllers you could refactor to:
def create
#place = current_user.places.new(place_params)
if #place.save
redirect_to root_path
else
render :new
end
end
def update
#place = current_user.places.find(params[:id])
#place.attributes = place_params
if #place.save
redirect_to root_path
else
render :edit
end
end