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Contents
# frozen_string_literal: true
require 'valkyrie/persistence/postgres/persister'
require 'valkyrie/persistence/postgres/query_service'
module Valkyrie::Persistence::Postgres
# Metadata Adapter for Postgres Adapter.
#
# This adapter uses ActiveRecord to persist resources in a JSON-B column named
# `metadata`. This requires setting up a database.
#
# @see https://github.com/samvera-labs/valkyrie/wiki/Set-up-Valkyrie-database-in-a-Rails-Application
class MetadataAdapter
# @return [Class] {Valkyrie::Persistence::Postgres::Persister}
def persister
Valkyrie::Persistence::Postgres::Persister.new(adapter: self)
end
# @return [Class] {Valkyrie::Persistence::Postgres::QueryService}
def query_service
@query_service ||= Valkyrie::Persistence::Postgres::QueryService.new(
resource_factory: resource_factory,
adapter: self
)
end
# @return [Class] {Valkyrie::Persistence::Postgres::ResourceFactory}
def resource_factory
@resource_factory ||= Valkyrie::Persistence::Postgres::ResourceFactory.new(adapter: self)
end
# Construct a Valkyrie ID object using an MD5 hash generated from the database URL
# @return [Valkyrie::ID]
def id
@id ||= begin
to_hash = "#{resource_factory.orm_class.connection_config['host']}:#{resource_factory.orm_class.connection_config['database']}"
Valkyrie::ID.new(Digest::MD5.hexdigest(to_hash))
end
end
end
end
Version data entries
17 entries across 17 versions & 1 rubygems