validate uniqueness, don't allow duplicate campaigns.

app/controllers/campaigns_controller.rb

@@ -22,7 +22,9 @@ class CampaignsController < ApplicationController
 
   # POST /campaigns
   def create
-    @campaign = Campaign.new(campaign_params)
+    clientid = campaign_params.delete(:clientid)
+    @campaign = Campaign.find_or_create_by(clientid: clientid)
+    @campaign.update(campaign_params)
 
     if @campaign.save
       respond_to do |format|
@@ -57,11 +59,11 @@ class CampaignsController < ApplicationController
 
     # Only allow a trusted parameter "white list" through.
     def campaign_params
-      params.require(:campaign).permit(:clientid, :listingcode, :billingcode, :advertisername, :address1,
+      params.require(:campaign).permit(:id, :clientid, :listingcode, :billingcode, :advertisername, :address1,
                                        :address2, :city, :state, :zip, :emailaddress, :customerfirstname,
                                        :customerlastname, :salesrep, :salesrepemail, :businessphone,
                                        :contactphone, :websiteurl,
-                    videolistings_attributes: [:videocode, :producttypeid, :remoteassetsarchive, :voiceoverselection,
+                    videolistings_attributes: [:id, :videocode, :producttypeid, :remoteassetsarchive, :voiceoverselection,
                                     :musicselection, :clientprovidedscript, :keywords, :focus, :notes, :asseturls,])
     end
 

app/models/campaign.rb

@@ -1,4 +1,5 @@
 class Campaign < ActiveRecord::Base
   has_many :videolistings
   accepts_nested_attributes_for :videolistings
+  validates :clientid, presence: true, uniqueness: true
 end

app/models/videolisting.rb

@@ -1,3 +1,4 @@
 class Videolisting < ActiveRecord::Base
   belongs_to :campaign
+  validates :videocode, presence: true, uniqueness: true
 end