Sha256: da5fc7e3573d599ea7d9079fb8a4933cd0532b40d8bec751880a53b8cfc909de
Contents?: true
Size: 1.59 KB
Versions: 18
Compression:
Stored size: 1.59 KB
Contents
module Kithe
# From: https://guides.rubyonrails.org/v6.0/autoloading_and_reloading_constants.html#single-table-inheritance
# https://edgeguides.rubyonrails.org/autoloading_and_reloading_constants.html#single-table-inheritance
#
# While this is recommended starting with Rails6 and zeitwerk, it will work
# fine under Rails 5.2 and previous also, to make sure all sub-classes in
# db are loaded, so ActiveRecord knows how to create SQL WHERE clauses
# on particular inheritance hieararchies.
#
# We include in our Kithe::Model, which uses Single-Table Inheritance
module StiPreload
unless Rails.application.config.eager_load
extend ActiveSupport::Concern
included do
cattr_accessor :preloaded, instance_accessor: false
end
class_methods do
def descendants
preload_sti unless preloaded
super
end
# Constantizes all types present in the database. There might be more on
# disk, but that does not matter in practice as far as the STI API is
# concerned.
#
# Assumes store_full_sti_class is true, the default.
def preload_sti
types_in_db = \
base_class.
unscoped.
select(inheritance_column).
distinct.
pluck(inheritance_column).
compact
types_in_db.each do |type|
logger.debug("Preloading Single-Table Inheritance type #{type} for #{base_class.name}")
type.constantize
end
self.preloaded = true
end
end
end
end
end
Version data entries
18 entries across 18 versions & 1 rubygems