From b5920d8ba8d5e9c55ffff23d6dbdeb3bf590535e Mon Sep 17 00:00:00 2001
From: Kyle Drake <kyle@kyledrake.net>
Date: Thu, 13 Aug 2015 19:01:13 -0500
Subject: [PATCH] Dedupe follows

---
 Rakefile                                | 13 +++++++++++++
 migrations/073_add_follow_uniqueness.rb |  9 +++++++++
 2 files changed, 22 insertions(+)
 create mode 100644 migrations/073_add_follow_uniqueness.rb

diff --git a/Rakefile b/Rakefile
index b28ad941..ccb0c34e 100644
--- a/Rakefile
+++ b/Rakefile
@@ -240,6 +240,19 @@ task :prime_site_files => [:environment] do
   end
 end
 
+desc 'dedupe_follows'
+task :dedupe_follows => [:environment] do
+  follows = Follow.all
+  deduped_follows = Follow.all.uniq {|f| "#{f.site_id}_#{f.actioning_site_id}"}
+
+  follows.each do |follow|
+    unless deduped_follows.include?(follow)
+      puts "deleting dedupe: #{follow.inspect}"
+      follow.delete
+    end
+  end
+end
+
 =begin
 desc 'Update screenshots'
 task :update_screenshots => [:environment] do
diff --git a/migrations/073_add_follow_uniqueness.rb b/migrations/073_add_follow_uniqueness.rb
new file mode 100644
index 00000000..4e80ff28
--- /dev/null
+++ b/migrations/073_add_follow_uniqueness.rb
@@ -0,0 +1,9 @@
+Sequel.migration do
+  up {
+    DB['alter table follows add constraint one_follow_per_site unique (site_id, actioning_site_id)'].first
+  }
+
+  down {
+    DB['alter table follows drop constraint one_follow_per_site'].first
+  }
+end