impress/app/models/item/proxy_array.rb
Matchu 02abd4e07f Simplify item_link rendering
In the interest of clearing out Resque, I'm just gonna remove a lot of our more complex caching stuff, and we can do a perf pass for things like big item list pages once everything's upgraded. (I'm hopeful that the upgrades themselves improve perf; and if not, that some improved sensibilities 10 years later can find simpler approaches.)
2023-10-23 19:05:04 -07:00

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1.7 KiB
Ruby

class Item
class ProxyArray < Array
# TODO: do we really need to include translations? The search documents
# know the proper name for each locale, so proxies can tell their
# parent items what their names are and save the query entirely.
SCOPES = HashWithIndifferentAccess.new({
method: {
as_json: Item.includes(:translations),
}
})
def initialize(proxies_or_items_or_ids=[])
self.replace(proxies_or_items_or_ids.map { |proxy_or_item_or_id|
if proxy_or_item_or_id.is_a?(Proxy)
proxy_or_item_or_id
else
Proxy.new(proxy_or_item_or_id)
end
})
end
def prepare_method(name)
prepare(:method, name)
end
def prepare_partial(name)
prepare(:partial, name)
end
private
def prepare(type, name)
item_scope = SCOPES[type][name]
raise "unexpected #{type} #{name.inspect}" unless item_scope
# Try to read all values from the cache in one go, setting the proxy
# values as we go along. Delete successfully set proxies, so that
# everything left in proxies_by_key in the end is known to be a miss.
proxies_by_key = {}
self.each do |p|
proxies_by_key[p.fragment_key(type, name)] ||= []
proxies_by_key[p.fragment_key(type, name)] << p
end
Rails.cache.read_multi(*proxies_by_key.keys).each { |k, v|
proxies_by_key.delete(k).each { |p| p.set_known_output(type, name, v) }
}
missed_proxies = proxies_by_key.values.flatten
missed_proxies_by_id = missed_proxies.index_by(&:id)
item_scope.find(missed_proxies_by_id.keys).each do |item|
missed_proxies_by_id[item.id].item = item
end
end
end
end