Change post_appeals.creator_ip_addr from integer to inet.

The existing values are garbage, rails stored e.g. "87.126.98.245" as
"87.126.98.245".to_i => 87. The column is nulled to indicate these IPs
are unknown.

app/logical/moderator/ip_addr_search.rb

@@ -55,7 +55,7 @@ module Moderator
       add_row(sums, WikiPageVersion.where(updater: users).group(:updater_ip_addr).count)
       add_row(sums, Comment.where(creator: users).group(:ip_addr).count)
       add_row(sums, Dmail.where(from: users).group(:creator_ip_addr).count)
-      add_row(sums, PostAppeal.where(creator: users).group(:creator_ip_addr).count)
+      add_row(sums, PostAppeal.where(creator: users).where.not(creator_ip_addr: nil).group(:creator_ip_addr).count)
       add_row(sums, PostFlag.where(creator: users).group(:creator_ip_addr).count)
       add_row(sums, Upload.where(uploader: users).group(:uploader_ip_addr).count)
       add_row(sums, User.where(id: users).group(:last_ip_addr).count)

db/migrate/20170112060921_change_ip_addr_to_inet_on_post_appeals.rb

@@ -0,0 +1,11 @@
+class ChangeIpAddrToInetOnPostAppeals < ActiveRecord::Migration
+  def up
+    execute "set statement_timeout = 0"
+    change_column_null :post_appeals, :creator_ip_addr, true
+    execute "ALTER TABLE post_appeals ALTER COLUMN creator_ip_addr TYPE inet USING NULL"
+  end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration, "Can't recover the lost data"
+  end
+end

db/structure.sql

@@ -2557,7 +2557,7 @@ CREATE TABLE post_appeals (
     id integer NOT NULL,
     post_id integer NOT NULL,
     creator_id integer NOT NULL,
-    creator_ip_addr integer NOT NULL,
+    creator_ip_addr inet,
     reason text,
     created_at timestamp without time zone,
     updated_at timestamp without time zone
@@ -7438,3 +7438,6 @@ INSERT INTO schema_migrations (version) VALUES ('20161229001201');
 INSERT INTO schema_migrations (version) VALUES ('20170106012138');
 
 INSERT INTO schema_migrations (version) VALUES ('20170112021922');
+
+INSERT INTO schema_migrations (version) VALUES ('20170112060921');
+