chore: Campaign ID migration for existing accounts (#2189)

* chore: Campaign ID migration for existing accounts

* chore: update factory

* chore: minor fixes

* chore: fixes

db/migrate/20210430095748_add_camp_dp_id_seq_for_existing_accounts.rb

@@ -0,0 +1,20 @@
+class AddCampDpIdSeqForExistingAccounts < ActiveRecord::Migration[6.0]
+  def up
+    ::Account.find_in_batches do |accounts_batch|
+      Rails.logger.info "migrated till #{accounts_batch.first.id}\n"
+      accounts_batch.each do |account|
+        display_id = account.campaigns.count
+        ActiveRecord::Base.connection.exec_query("create sequence IF NOT EXISTS camp_dpid_seq_#{account.id} START #{display_id + 1}")
+      end
+    end
+  end
+
+  def down
+    ::Account.find_in_batches do |accounts_batch|
+      Rails.logger.info "migrated till #{accounts_batch.first.id}\n"
+      accounts_batch.each do |account|
+        ActiveRecord::Base.connection.exec_query("drop sequence IF EXISTS camp_dpid_seq_#{account.id}")
+      end
+    end
+  end
+end

db/migrate/20210430100138_rename_campaign_content_to_message.rb

@@ -0,0 +1,5 @@
+class RenameCampaignContentToMessage < ActiveRecord::Migration[6.0]
+  def change
+    rename_column :campaigns, :content, :message
+  end
+end