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Fix cache_collection crashing when given an empty collection (#15921)

* Fix cache_collection crashing when given an empty collection

* Add tests
closed-social-v3
Claire 10 months ago
committed by GitHub
parent
commit
5027abecd1
No known key found for this signature in database GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 65 additions and 2 deletions
  1. +3
    -1
      app/controllers/concerns/cache_concern.rb
  2. +3
    -1
      app/lib/entity_cache.rb
  3. +40
    -0
      spec/controllers/concerns/cache_concern_spec.rb
  4. +19
    -0
      spec/lib/entity_cache_spec.rb

+ 3
- 1
app/controllers/concerns/cache_concern.rb View File

@ -31,7 +31,9 @@ module CacheConcern
def cache_collection(raw, klass)
return raw unless klass.respond_to?(:with_includes)
raw = raw.cache_ids.to_a if raw.is_a?(ActiveRecord::Relation)
raw = raw.cache_ids.to_a if raw.is_a?(ActiveRecord::Relation)
return [] if raw.empty?
cached_keys_with_value = Rails.cache.read_multi(*raw).transform_keys(&:id)
uncached_ids = raw.map(&:id) - cached_keys_with_value.keys

+ 3
- 1
app/lib/entity_cache.rb View File

@ -16,7 +16,9 @@ class EntityCache
end
def emoji(shortcodes, domain)
shortcodes = Array(shortcodes)
shortcodes = Array(shortcodes)
return [] if shortcodes.empty?
cached = Rails.cache.read_multi(*shortcodes.map { |shortcode| to_key(:emoji, shortcode, domain) })
uncached_ids = []

+ 40
- 0
spec/controllers/concerns/cache_concern_spec.rb View File

@ -0,0 +1,40 @@
# frozen_string_literal: true
require 'rails_helper'
RSpec.describe CacheConcern, type: :controller do
controller(ApplicationController) do
include CacheConcern
def empty_array
render plain: cache_collection([], Status).size
end
def empty_relation
render plain: cache_collection(Status.none, Status).size
end
end
before do
routes.draw do
get 'empty_array' => 'anonymous#empty_array'
post 'empty_relation' => 'anonymous#empty_relation'
end
end
describe '#cache_collection' do
context 'given an empty array' do
it 'returns an empty array' do
get :empty_array
expect(response.body).to eq '0'
end
end
context 'given an empty relation' do
it 'returns an empty array' do
get :empty_relation
expect(response.body).to eq '0'
end
end
end
end

+ 19
- 0
spec/lib/entity_cache_spec.rb View File

@ -0,0 +1,19 @@
require 'rails_helper'
RSpec.describe EntityCache do
let(:local_account) { Fabricate(:account, domain: nil, username: 'alice') }
let(:remote_account) { Fabricate(:account, domain: 'remote.test', username: 'bob', url: 'https://remote.test/') }
describe '#emoji' do
subject { EntityCache.instance.emoji(shortcodes, domain) }
context 'called with an empty list of shortcodes' do
let(:shortcodes) { [] }
let(:domain) { 'example.org' }
it 'returns an empty array' do
is_expected.to eq []
end
end
end
end

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