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Contents
module Tessa
module Model
class Field
include Virtus.model
attribute :model
attribute :name, String
attribute :multiple, Boolean, default: false
attribute :id_field, String
def id_field
super || "#{name}#{default_id_field_suffix}"
end
def ids(on:)
[*id(on: on)]
end
def id(on:)
on.public_send(id_field)
end
def apply(set, on:)
ids = ids(on: on)
set.scoped_changes.each do |change|
if change.add?
ids << change.id
elsif change.remove?
ids.delete change.id
end
end
if multiple?
on.public_send(id_field_writer, ids)
else
on.public_send(id_field_writer, ids.first)
end
end
def change_set_for(value)
case value
when AssetChangeSet
value
when Array
value.map { |item| change_set_for(item) }.reduce(:+)
when Asset
AssetChangeSet.new.tap { |set| set.add(value) }
else
AssetChangeSet.new
end
end
def difference_change_set(subtrahend_ids, on:)
AssetChangeSet.new.tap do |change_set|
(ids(on: on) - subtrahend_ids).each do |id|
change_set.remove(id)
end
end
end
private
def id_field_writer
"#{id_field}="
end
def default_id_field_suffix
if multiple
"_ids"
else
"_id"
end
end
end
end
end
Version data entries
27 entries across 27 versions & 1 rubygems