91 lines
3.5 KiB
Ruby
91 lines
3.5 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Graphql
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module Pagination
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module Keyset
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# https://gitlab.com/gitlab-org/gitlab/-/issues/334973
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# Use the generic keyset implementation if the given ActiveRecord scope supports it.
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# Note: this module is temporary, at some point it will be merged with Keyset::Connection
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module GenericKeysetPagination
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extend ActiveSupport::Concern
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# rubocop: disable Naming/PredicateName
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# rubocop: disable CodeReuse/ActiveRecord
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def has_next_page
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return super unless Gitlab::Pagination::Keyset::Order.keyset_aware?(items)
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strong_memoize(:generic_keyset_pagination_has_next_page) do
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if before
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# If `before` is specified, that points to a specific record,
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# even if it's the last one. Since we're asking for `before`,
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# then the specific record we're pointing to is in the
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# next page
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true
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elsif first
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case sliced_nodes
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when Array
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sliced_nodes.size > limit_value
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else
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# If we count the number of requested items plus one (`limit_value + 1`),
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# then if we get `limit_value + 1` then we know there is a next page
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sliced_nodes.limit(1).offset(limit_value).exists?
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# replacing relation count
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# relation_count(set_limit(sliced_nodes, limit_value + 1)) == limit_value + 1
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end
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else
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false
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end
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end
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end
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# rubocop: enable CodeReuse/ActiveRecord
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def ordered_items
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raise ArgumentError, 'Relation must have a primary key' unless items.primary_key.present?
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return super unless Gitlab::Pagination::Keyset::Order.keyset_aware?(items)
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items
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end
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def cursor_for(node)
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return super unless Gitlab::Pagination::Keyset::Order.keyset_aware?(items)
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order = Gitlab::Pagination::Keyset::Order.extract_keyset_order_object(items)
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encode(order.cursor_attributes_for_node(node).to_json)
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end
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def slice_nodes(sliced, encoded_cursor, before_or_after)
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return super unless Gitlab::Pagination::Keyset::Order.keyset_aware?(sliced)
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order = Gitlab::Pagination::Keyset::Order.extract_keyset_order_object(sliced)
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order = order.reversed_order if before_or_after == :before
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decoded_cursor = ordering_from_encoded_json(encoded_cursor)
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order.apply_cursor_conditions(sliced, decoded_cursor)
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end
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def sliced_nodes
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return super unless Gitlab::Pagination::Keyset::Order.keyset_aware?(items)
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sliced = ordered_items
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sliced = slice_nodes(sliced, before, :before) if before.present?
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sliced = slice_nodes(sliced, after, :after) if after.present?
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sliced
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end
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def items
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original_items = super
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return original_items if Gitlab::Pagination::Keyset::Order.keyset_aware?(original_items) || Feature.disabled?(:new_graphql_keyset_pagination)
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strong_memoize(:generic_keyset_pagination_items) do
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rebuilt_items_with_keyset_order, success = Gitlab::Pagination::Keyset::SimpleOrderBuilder.build(original_items)
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success ? rebuilt_items_with_keyset_order : original_items
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end
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end
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end
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end
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end
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end
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end
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