potential fix for #1305

app/logical/api_cache_generator.rb

@@ -1,18 +1,21 @@
 class ApiCacheGenerator
   def generate_tag_cache
-    File.open("#{Rails.root}/public/cache/tags.json", "w") do |f|
+    FileUtils.mkdir_p("/var/www/danbooru2/shared/system/cache")
+    File.open("/var/www/danbooru2/shared/system/cache/tags.json", "w") do |f|
       f.print("[")
-      Tag.find_each do |tag|
-        next unless tag.post_count > 0
-        hash = {
-          "name" => tag.name,
-          "id" => tag.id,
-          "created_at" => tag.created_at,
-          "post_count" => tag.post_count,
-          "category" => tag.category
-        }
-        f.print(hash.to_json)
-        f.print(", ")
+      Tag.without_timeout do
+        Tag.find_each do |tag|
+          next unless tag.post_count > 0
+          hash = {
+            "name" => tag.name,
+            "id" => tag.id,
+            "created_at" => tag.created_at,
+            "post_count" => tag.post_count,
+            "category" => tag.category
+          }
+          f.print(hash.to_json)
+          f.print(", ")
+        end
       end
       f.seek(-2, IO::SEEK_END)
       f.print("]\n")

app/logical/daily_maintenance.rb

@@ -2,7 +2,7 @@ class DailyMaintenance
   def run
     ActiveRecord::Base.connection.execute("set statement_timeout = 0")
     PostPruner.new.prune!
-    # TagPruner.new.prune!
+    TagPruner.new.prune!
     Upload.delete_all(['created_at < ?', 1.day.ago])
     ModAction.delete_all(['created_at < ?', 3.days.ago])
     Delayed::Job.delete_all(['created_at < ?', 1.day.ago])

app/logical/tag_pruner.rb

@@ -1,7 +1,6 @@
 class TagPruner
   def prune!
     Tag.without_timeout do
-      Tag.destroy_all(["post_count <= 0 and name like '%%:%%'"])
     end
   end
 end

config/deploy.rb

@@ -57,6 +57,11 @@ namespace :data do
 
     run "rm -f #{release_path}/public/images/advertisements"
     run "ln -s #{deploy_to}/shared/advertisements #{release_path}/public/images/advertisements"
+
+    run "mkdir -p #{release_path}/public/cache"
+    run "mkdir -p #{deploy_to}/shared/system/cache"
+    run "touch #{deploy_to}/shared/system/cache/tags.json"
+    run "ln -s #{deploy_to}/shared/system/cache/tags.json #{release_path}/public/cache/tags.json"
   end
 end