FIX: The "too similar" check happened when trying to make a post a wiki

app/models/post.rb

@@ -121,7 +121,7 @@ class Post < ActiveRecord::Base
 
   # The key we use in redis to ensure unique posts
   def unique_post_key
-    "post-#{user_id}:#{raw_hash}"
+    "unique-post-#{user_id}:#{raw_hash}"
   end
 
   def store_unique_post_key
@@ -132,7 +132,7 @@ class Post < ActiveRecord::Base
 
   def matches_recent_post?
     post_id = $redis.get(unique_post_key)
-    post_id != nil and post_id != id
+    post_id != nil and post_id.to_i != id
   end
 
   def raw_hash

lib/discourse_redis.rb

@@ -70,6 +70,10 @@ class DiscourseRedis
     }
   end
 
+  def delete_prefixed(prefix)
+    keys("#{prefix}*").each { |k| $redis.del(k) }
+  end
+
   def flushdb
     keys.each{|k| del(k)}
   end

lib/post_revisor.rb

@@ -211,6 +211,7 @@ class PostRevisor
     clear_flags_and_unhide_post
 
     @post.extract_quoted_post_numbers
+
     @post_successfully_saved = @post.save(validate: @validate_post)
     @post.save_reply_relationships
   end

lib/rate_limiter.rb

@@ -4,7 +4,9 @@ require_dependency 'rate_limiter/on_create_record'
 # A redis backed rate limiter.
 class RateLimiter
 
-  KEY_PREFIX = "l-rate-limit:"
+  def self.key_prefix
+    "l-rate-limit:"
+  end
 
   def self.disable
     @disabled = true
@@ -20,12 +22,12 @@ class RateLimiter
   end
 
   def self.clear_all!
-    $redis.keys("#{KEY_PREFIX}:*").each { |k| $redis.del(k) }
+    $redis.delete_prefixed(RateLimiter.key_prefix)
   end
 
   def initialize(user, key, max, secs)
     @user = user
-    @key = "#{KEY_PREFIX}:#{@user && @user.id}:#{key}"
+    @key = "#{RateLimiter.key_prefix}:#{@user && @user.id}:#{key}"
     @max = max
     @secs = secs
   end

spec/components/post_revisor_spec.rb

@@ -39,6 +39,24 @@ describe PostRevisor do
     end
   end
 
+  context 'revise wiki' do
+
+    before do
+      # There used to be a bug where wiki changes were considered posting "too similar"
+      # so this is enabled and checked
+      $redis.delete_prefixed('unique-post')
+      SiteSetting.unique_posts_mins = 10
+    end
+
+    it 'allows the user to change it to a wiki' do
+      pc = PostCreator.new(newuser, topic_id: topic.id, raw: 'this is a post that will become a wiki')
+      post = pc.create
+      post.revise(post.user, wiki: true).should == true
+      post.reload
+      post.wiki.should be_true
+    end
+  end
+
   context 'revise' do
     let(:post) { Fabricate(:post, post_args) }
     let(:first_version_at) { post.last_version_at }