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# Store object full path in separate table for easy lookup and uniq validation
# Object must have name and path db fields and respond to parent and parent_changed? methods.
module Routable
extend ActiveSupport::Concern
included do
has_one :route, as: :source, autosave: true, dependent: :destroy
validates_associated :route
validates :route, presence: true
scope :with_route, -> { includes(:route) }
before_validation do
if full_path_changed? || full_name_changed?
prepare_route
end
end
end
class_methods do
# Finds a single object by full path match in routes table.
#
# Usage:
#
# Klass.find_by_full_path('gitlab-org/gitlab-ce')
#
# Returns a single object, or nil.
def find_by_full_path(path)
# On MySQL we want to ensure the ORDER BY uses a case-sensitive match so
# any literal matches come first, for this we have to use "BINARY".
# Without this there's still no guarantee in what order MySQL will return
# rows.
binary = Gitlab::Database.mysql? ? 'BINARY' : ''
order_sql = "(CASE WHEN #{binary} routes.path = #{connection.quote(path)} THEN 0 ELSE 1 END)"
where_full_path_in([path]).reorder(order_sql).take
end
# Builds a relation to find multiple objects by their full paths.
#
# Usage:
#
# Klass.where_full_path_in(%w{gitlab-org/gitlab-ce gitlab-org/gitlab-ee})
#
# Returns an ActiveRecord::Relation.
def where_full_path_in(paths)
wheres = []
cast_lower = Gitlab::Database.postgresql?
paths.each do |path|
path = connection.quote(path)
where = "(routes.path = #{path})"
if cast_lower
where = "(#{where} OR (LOWER(routes.path) = LOWER(#{path})))"
end
wheres << where
end
if wheres.empty?
none
else
joins(:route).where(wheres.join(' OR '))
end
end
# Builds a relation to find multiple objects that are nested under user membership
#
# Usage:
#
# Klass.member_descendants(1)
#
# Returns an ActiveRecord::Relation.
def member_descendants(user_id)
joins(:route).
joins("INNER JOIN routes r2 ON routes.path LIKE CONCAT(r2.path, '/%')
INNER JOIN members ON members.source_id = r2.source_id
AND members.source_type = r2.source_type").
where('members.user_id = ?', user_id)
end
end
def full_name
if route && route.name.present?
@full_name ||= route.name
else
update_route if persisted?
build_full_name
end
end
def full_path
if route && route.path.present?
@full_path ||= route.path
else
update_route if persisted?
build_full_path
end
end
private
def full_name_changed?
name_changed? || parent_changed?
end
def full_path_changed?
path_changed? || parent_changed?
end
def build_full_name
if parent && name
parent.human_name + ' / ' + name
else
name
end
end
def build_full_path
if parent && path
parent.full_path + '/' + path
else
path
end
end
def update_route
prepare_route
route.save
end
def prepare_route
route || build_route(source: self)
route.path = build_full_path
route.name = build_full_name
@full_path = nil
@full_name = nil
end
end
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