diff options
Diffstat (limited to 'lib/gitlab/diff/file_collection/paginated_diffs.rb')
| -rw-r--r-- | lib/gitlab/diff/file_collection/paginated_diffs.rb | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/lib/gitlab/diff/file_collection/paginated_diffs.rb b/lib/gitlab/diff/file_collection/paginated_diffs.rb new file mode 100644 index 00000000000..63c186affe9 --- /dev/null +++ b/lib/gitlab/diff/file_collection/paginated_diffs.rb @@ -0,0 +1,48 @@ +# frozen_string_literal: true + +module Gitlab + module Diff + module FileCollection + module PaginatedDiffs + include Gitlab::Utils::StrongMemoize + extend ::Gitlab::Utils::Override + + override :diffs + def diffs + merge_request_diff.opening_external_diff do + # Avoiding any extra queries. + collection = paginated_collection.to_a + + # The offset collection and calculation is required so that we + # know how much has been loaded in previous batches, collapsing + # the current paginated set accordingly (collection limit calculation). + # See: https://docs.gitlab.com/ee/development/diffs.html#diff-collection-limits + # + offset_index = collection.first&.index + options = diff_options.dup + + collection = + if offset_index && offset_index > 0 + offset_collection = relation.limit(offset_index) # rubocop:disable CodeReuse/ActiveRecord + options[:offset_index] = offset_index + offset_collection + collection + else + collection + end + + Gitlab::Git::DiffCollection.new(collection.map(&:to_hash), options) + end + end + strong_memoize_attr :diffs + + private + + attr_reader :merge_request_diff, :paginated_collection + + def relation + merge_request_diff.merge_request_diff_files + end + end + end + end +end |