diff options
Diffstat (limited to 'lib/gitlab/graphql/pagination/keyset/query_builder.rb')
| -rw-r--r-- | lib/gitlab/graphql/pagination/keyset/query_builder.rb | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/lib/gitlab/graphql/pagination/keyset/query_builder.rb b/lib/gitlab/graphql/pagination/keyset/query_builder.rb deleted file mode 100644 index a2f53ae83dd..00000000000 --- a/lib/gitlab/graphql/pagination/keyset/query_builder.rb +++ /dev/null @@ -1,73 +0,0 @@ -# frozen_string_literal: true - -module Gitlab - module Graphql - module Pagination - module Keyset - class QueryBuilder - def initialize(arel_table, order_list, decoded_cursor, before_or_after) - @arel_table = arel_table - @order_list = order_list - @decoded_cursor = decoded_cursor - @before_or_after = before_or_after - - if order_list.empty? - raise ArgumentError, 'No ordering scopes have been supplied' - end - end - - # Based on whether the main field we're ordering on is NULL in the - # cursor, we can more easily target our query condition. - # We assume that the last ordering field is unique, meaning - # it will not contain NULLs. - # We currently only support two ordering fields. - # - # Example of the conditions for - # relation: Issue.order(relative_position: :asc).order(id: :asc) - # after cursor: relative_position: 1500, id: 500 - # - # when cursor[relative_position] is not NULL - # - # ("issues"."relative_position" > 1500) - # OR ( - # "issues"."relative_position" = 1500 - # AND - # "issues"."id" > 500 - # ) - # OR ("issues"."relative_position" IS NULL) - # - # when cursor[relative_position] is NULL - # - # "issues"."relative_position" IS NULL - # AND - # "issues"."id" > 500 - # - def conditions - attr_values = order_list.map do |field| - name = field.try(:attribute_name) || field - decoded_cursor[name] - end - - if order_list.count == 1 && attr_values.first.nil? - raise Gitlab::Graphql::Errors::ArgumentError, 'Before/after cursor invalid: `nil` was provided as only sortable value' - end - - if order_list.count == 1 || attr_values.first.present? - Keyset::Conditions::NotNullCondition.new(arel_table, order_list, attr_values, operators, before_or_after).build - else - Keyset::Conditions::NullCondition.new(arel_table, order_list, attr_values, operators, before_or_after).build - end - end - - private - - attr_reader :arel_table, :order_list, :decoded_cursor, :before_or_after - - def operators - order_list.map { |field| field.operator_for(before_or_after) } - end - end - end - end - end -end |