diff options
author | GitLab Bot <gitlab-bot@gitlab.com> | 2021-05-19 18:44:42 +0300 |
---|---|---|
committer | GitLab Bot <gitlab-bot@gitlab.com> | 2021-05-19 18:44:42 +0300 |
commit | 4555e1b21c365ed8303ffb7a3325d773c9b8bf31 (patch) | |
tree | 5423a1c7516cffe36384133ade12572cf709398d /lib/gitlab/pagination/keyset/iterator.rb | |
parent | e570267f2f6b326480d284e0164a6464ba4081bc (diff) |
Add latest changes from gitlab-org/gitlab@13-12-stable-eev13.12.0-rc42
Diffstat (limited to 'lib/gitlab/pagination/keyset/iterator.rb')
-rw-r--r-- | lib/gitlab/pagination/keyset/iterator.rb | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/lib/gitlab/pagination/keyset/iterator.rb b/lib/gitlab/pagination/keyset/iterator.rb new file mode 100644 index 00000000000..3bc8c0bf616 --- /dev/null +++ b/lib/gitlab/pagination/keyset/iterator.rb @@ -0,0 +1,40 @@ +# frozen_string_literal: true + +module Gitlab + module Pagination + module Keyset + class Iterator + def initialize(scope:, use_union_optimization: false) + @scope = scope + @order = Gitlab::Pagination::Keyset::Order.extract_keyset_order_object(scope) + @use_union_optimization = use_union_optimization + end + + # rubocop: disable CodeReuse/ActiveRecord + def each_batch(of: 1000) + cursor_attributes = {} + + loop do + current_scope = scope.dup.limit(of) + relation = order + .apply_cursor_conditions(current_scope, cursor_attributes, { use_union_optimization: @use_union_optimization }) + .reorder(order) + .limit(of) + + yield relation + + last_record = relation.last + break unless last_record + + cursor_attributes = order.cursor_attributes_for_node(last_record) + end + end + # rubocop: enable CodeReuse/ActiveRecord + + private + + attr_reader :scope, :order + end + end + end +end |