summaryrefslogtreecommitdiff
path: root/config
diff options
context:
space:
mode:
authorNick Thomas <nick@gitlab.com>2016-10-06 22:17:11 +0100
committerNick Thomas <nick@gitlab.com>2016-10-07 02:54:25 +0100
commite94cd6fdfe43d9128d37a539cf84f4388c5cf970 (patch)
tree333c35b6a4483ee0e6b2668486a8f8c81091aa90 /config
parent4a90e25f0308515bc4f240e82854a364aea47046 (diff)
downloadgitlab-ce-e94cd6fdfe43d9128d37a539cf84f4388c5cf970.tar.gz
Add markdown cache columns to the database, but don't use them yet
This commit adds a number of _html columns and, with the exception of Note, starts updating them whenever the content of their partner fields changes. Note has a collision with the note_html attr_accessor; that will be fixed later A background worker for clearing these cache columns is also introduced - use `rake cache:clear` to set it off. You can clear the database or Redis caches separately by running `rake cache:clear:db` or `rake cache:clear:redis`, respectively.
Diffstat (limited to 'config')
-rw-r--r--config/initializers/ar5_batching.rb41
1 files changed, 41 insertions, 0 deletions
diff --git a/config/initializers/ar5_batching.rb b/config/initializers/ar5_batching.rb
new file mode 100644
index 00000000000..35e8b3808e2
--- /dev/null
+++ b/config/initializers/ar5_batching.rb
@@ -0,0 +1,41 @@
+# Port ActiveRecord::Relation#in_batches from ActiveRecord 5.
+# https://github.com/rails/rails/blob/ac027338e4a165273607dccee49a3d38bc836794/activerecord/lib/active_record/relation/batches.rb#L184
+# TODO: this can be removed once we're using AR5.
+raise "Vendored ActiveRecord 5 code! Delete #{__FILE__}!" if ActiveRecord::VERSION::MAJOR >= 5
+
+module ActiveRecord
+ module Batches
+ # Differences from upstream: enumerator support was removed, and custom
+ # order/limit clauses are ignored without a warning.
+ def in_batches(of: 1000, start: nil, finish: nil, load: false)
+ raise "Must provide a block" unless block_given?
+
+ relation = self.reorder(batch_order).limit(of)
+ relation = relation.where(arel_table[primary_key].gteq(start)) if start
+ relation = relation.where(arel_table[primary_key].lteq(finish)) if finish
+ batch_relation = relation
+
+ loop do
+ if load
+ records = batch_relation.records
+ ids = records.map(&:id)
+ yielded_relation = self.where(primary_key => ids)
+ yielded_relation.load_records(records)
+ else
+ ids = batch_relation.pluck(primary_key)
+ yielded_relation = self.where(primary_key => ids)
+ end
+
+ break if ids.empty?
+
+ primary_key_offset = ids.last
+ raise ArgumentError.new("Primary key not included in the custom select clause") unless primary_key_offset
+
+ yield yielded_relation
+
+ break if ids.length < of
+ batch_relation = relation.where(arel_table[primary_key].gt(primary_key_offset))
+ end
+ end
+ end
+end