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# frozen_string_literal: true
module Gitlab
module Graphql
module Pagination
module Keyset
module Conditions
class NullCondition < BaseCondition
def build
[first_attribute_condition, final_condition].join
end
private
# ex: "(relative_position IS NULL AND id > 500)"
def first_attribute_condition
condition = <<~SQL
(
#{table_condition(order_list.first, nil, 'is_null').to_sql}
AND
#{table_condition(order_list[1], values[1], operators[1]).to_sql}
)
SQL
condition
end
# ex: " OR (relative_position IS NOT NULL)"
def final_condition
if before_or_after == :before
<<~SQL
OR (#{table_condition(order_list.first, nil, 'is_not_null').to_sql})
SQL
end
end
end
end
end
end
end
end
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