Merge pull request #2085 from zz9pzza/issue_4084

Issue 4084

app/views/works/_work_module.html.erb

@@ -23,7 +23,7 @@
       <!-- do not cache -->
       <%= byline(work, visibility: "public") %>
 
-<% #### CACHE show/hide #### %>
+<% #### CACHE show/hide ####, if you update the key edit lib/tasks/memcached.rake %>
 <% cache("#{work.cache_key}-#{hide_warnings?(work) ? 'nowarn' : 'showwarn'}-#{hide_freeform?(work)  ? 'nofreeform' : 'showfreeform'}-v5") do %>
 
       <% tag_groups = work.tags.group_by { |t| t.type.to_s } %>

lib/tasks/memcached.rake

@@ -0,0 +1,19 @@
+namespace :memcached do
+
+ # For example
+ # WORKS="posted = 0" rake memcached:clear_work
+ #
+ desc "Clear memcached"
+ task :expire_work_blurbs => :environment  do
+  works=ENV['WORKS'] || 'id=1'
+  Work.where(works).find_each do |work|
+    puts "Clear memcached #{work.id}"
+    %w( nowarn showwarn ).each do |warn|
+      %w( nofreeform showfreeform ).each do |freeform|
+         Rails.cache.delete "#{work.cache_key}-#{warn}-#{freeform}-v5"
+      end 
+    end 
+  end 
+ end
+
+end