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# frozen_string_literal: true
module Ci
# This model represents a record in a shadow table of the main database's namespaces table.
# It allows us to navigate the namespace hierarchy on the ci database without resorting to a JOIN.
class NamespaceMirror < ApplicationRecord
include FromUnion
belongs_to :namespace
scope :by_group_and_descendants, -> (id) do
where('traversal_ids @> ARRAY[?]::int[]', id)
end
scope :contains_any_of_namespaces, -> (ids) do
where('traversal_ids && ARRAY[?]::int[]', ids)
end
scope :contains_traversal_ids, -> (traversal_ids) do
mirrors = []
traversal_ids.group_by(&:count).each do |columns_count, traversal_ids_group|
columns = Array.new(columns_count) { |i| "(traversal_ids[#{i + 1}])" }
pairs = traversal_ids_group.map do |ids|
ids = ids.map { |id| Arel::Nodes.build_quoted(id).to_sql }
"(#{ids.join(",")})"
end
# Create condition in format:
# ((traversal_ids[1]),(traversal_ids[2])) IN ((1,2),(2,3))
mirrors << Ci::NamespaceMirror.where("(#{columns.join(",")}) IN (#{pairs.join(",")})") # rubocop:disable GitlabSecurity/SqlInjection
end
self.from_union(mirrors)
end
scope :by_namespace_id, -> (namespace_id) { where(namespace_id: namespace_id) }
class << self
def sync!(event)
namespace = event.namespace
traversal_ids = namespace.self_and_ancestor_ids(hierarchy_order: :desc)
upsert({ namespace_id: event.namespace_id, traversal_ids: traversal_ids },
unique_by: :namespace_id)
# It won't be necessary once we remove `sync_traversal_ids`.
# More info: https://gitlab.com/gitlab-org/gitlab/-/issues/347541
sync_children_namespaces!(event.namespace_id, traversal_ids)
end
private
def sync_children_namespaces!(namespace_id, traversal_ids)
by_group_and_descendants(namespace_id)
.where.not(namespace_id: namespace_id)
.update_all(
"traversal_ids = ARRAY[#{sanitize_sql(traversal_ids.join(','))}]::int[] || traversal_ids[array_position(traversal_ids, #{sanitize_sql(namespace_id)}) + 1:]"
)
end
end
end
end
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