class Collection < ArvadosModel
- include AssignUuid
+ include HasUuid
include KindAndEtag
include CommonApiTemplate
end
end
+ def self.uuid_like_pattern
+ "________________________________+%"
+ end
+
def self.normalize_uuid uuid
hash_part = nil
size_part = nil
raise "uuid #{uuid} has no hash part" if !hash_part
[hash_part, size_part].compact.join '+'
end
+
+ def self.for_latest_docker_image(search_term, search_tag=nil, readers=nil)
+ readers ||= [Thread.current[:user]]
+ base_search = Link.
+ readable_by(*readers).
+ readable_by(*readers, table_name: "collections").
+ joins("JOIN collections ON links.head_uuid = collections.uuid").
+ order("links.created_at DESC")
+
+ # If the search term is a Collection locator with an associated
+ # Docker image hash link, return that Collection.
+ coll_matches = base_search.
+ where(link_class: "docker_image_hash", collections: {uuid: search_term})
+ if match = coll_matches.first
+ return find_by_uuid(match.head_uuid)
+ end
+
+ # Find Collections with matching Docker image repository+tag pairs.
+ matches = base_search.
+ where(link_class: "docker_image_repo+tag",
+ name: "#{search_term}:#{search_tag || 'latest'}")
+
+ # If that didn't work, find Collections with matching Docker image hashes.
+ if matches.empty?
+ matches = base_search.
+ where("link_class = ? and name LIKE ?",
+ "docker_image_hash", "#{search_term}%")
+ end
+
+ # Select the image that was created most recently. Note that the
+ # SQL search order and fallback timestamp values are chosen so
+ # that if image timestamps are missing, we use the image with the
+ # newest link.
+ latest_image_link = nil
+ latest_image_timestamp = "1900-01-01T00:00:00Z"
+ matches.find_each do |link|
+ link_timestamp = link.properties.fetch("image_timestamp",
+ "1900-01-01T00:00:01Z")
+ if link_timestamp > latest_image_timestamp
+ latest_image_link = link
+ latest_image_timestamp = link_timestamp
+ end
+ end
+ latest_image_link.nil? ? nil : find_by_uuid(latest_image_link.head_uuid)
+ end
end