require "cases/helper" require "models/topic" require "models/task" require "models/category" require "models/post" require "rack" class QueryCacheTest < ActiveRecord::TestCase self.use_transactional_tests = false fixtures :tasks, :topics, :categories, :posts, :categories_posts class ShouldNotHaveExceptionsLogger < ActiveRecord::LogSubscriber attr_reader :logger def initialize super @logger = ::Logger.new File::NULL @exception = false end def exception? @exception end def sql(event) super rescue @exception = true end end def teardown Task.connection.clear_query_cache ActiveRecord::Base.connection.disable_query_cache! super end def test_exceptional_middleware_clears_and_disables_cache_on_error assert_cache :off mw = middleware { |env| Task.find 1 Task.find 1 query_cache = ActiveRecord::Base.connection.query_cache assert_equal 1, query_cache.length, query_cache.keys raise "lol borked" } assert_raises(RuntimeError) { mw.call({}) } assert_cache :off end private def with_temporary_connection_pool old_pool = ActiveRecord::Base.connection_handler.retrieve_connection_pool(ActiveRecord::Base.connection_specification_name) new_pool = ActiveRecord::ConnectionAdapters::ConnectionPool.new ActiveRecord::Base.connection_pool.spec ActiveRecord::Base.connection_handler.send(:owner_to_pool)["primary"] = new_pool yield ensure ActiveRecord::Base.connection_handler.send(:owner_to_pool)["primary"] = old_pool end def test_query_cache_across_threads with_temporary_connection_pool do begin if in_memory_db? # Separate connections to an in-memory database create an entirely new database, # with an empty schema etc, so we just stub out this schema on the fly. ActiveRecord::Base.connection_pool.with_connection do |connection| connection.create_table :tasks do |t| t.datetime :starting t.datetime :ending end end ActiveRecord::FixtureSet.create_fixtures(self.class.fixture_path, ["tasks"], {}, ActiveRecord::Base) end ActiveRecord::Base.connection_pool.connections.each do |conn| assert_cache :off, conn end assert !ActiveRecord::Base.connection.nil? assert_cache :off middleware { assert_cache :clean Task.find 1 assert_cache :dirty thread_1_connection = ActiveRecord::Base.connection ActiveRecord::Base.clear_active_connections! assert_cache :off, thread_1_connection started = Concurrent::Event.new checked = Concurrent::Event.new thread_2_connection = nil thread = Thread.new { thread_2_connection = ActiveRecord::Base.connection assert_equal thread_2_connection, thread_1_connection assert_cache :off middleware { assert_cache :clean Task.find 1 assert_cache :dirty started.set checked.wait ActiveRecord::Base.clear_active_connections! }.call({}) } started.wait thread_1_connection = ActiveRecord::Base.connection assert_not_equal thread_1_connection, thread_2_connection assert_cache :dirty, thread_2_connection checked.set thread.join assert_cache :off, thread_2_connection }.call({}) ActiveRecord::Base.connection_pool.connections.each do |conn| assert_cache :off, conn end ensure ActiveRecord::Base.clear_all_connections! end end end def test_middleware_delegates called = false mw = middleware { |env| called = true [200, {}, nil] } mw.call({}) assert called, "middleware should delegate" end def test_middleware_caches mw = middleware { |env| Task.find 1 Task.find 1 query_cache = ActiveRecord::Base.connection.query_cache assert_equal 1, query_cache.length, query_cache.keys [200, {}, nil] } mw.call({}) end def test_cache_enabled_during_call assert_cache :off mw = middleware { |env| assert_cache :clean [200, {}, nil] } mw.call({}) end def test_cache_passing_a_relation post = Post.first Post.cache do query = post.categories.select(:post_id) assert Post.connection.select_all(query).is_a?(ActiveRecord::Result) end end def test_find_queries assert_queries(2) { Task.find(1); Task.find(1) } end def test_find_queries_with_cache Task.cache do assert_queries(1) { Task.find(1); Task.find(1) } end end def test_find_queries_with_cache_multi_record Task.cache do assert_queries(2) { Task.find(1); Task.find(1); Task.find(2) } end end def test_find_queries_with_multi_cache_blocks Task.cache do Task.cache do assert_queries(2) { Task.find(1); Task.find(2) } end assert_queries(0) { Task.find(1); Task.find(1); Task.find(2) } end end def test_count_queries_with_cache Task.cache do assert_queries(1) { Task.count; Task.count } end end def test_exists_queries_with_cache Post.cache do assert_queries(1) { Post.exists?; Post.exists? } end end def test_select_all_with_cache Post.cache do assert_queries(1) do 2.times { Post.connection.select_all(Post.all) } end end end def test_select_one_with_cache Post.cache do assert_queries(1) do 2.times { Post.connection.select_one(Post.all) } end end end def test_select_value_with_cache Post.cache do assert_queries(1) do 2.times { Post.connection.select_value(Post.all) } end end end def test_select_values_with_cache Post.cache do assert_queries(1) do 2.times { Post.connection.select_values(Post.all) } end end end def test_select_rows_with_cache Post.cache do assert_queries(1) do 2.times { Post.connection.select_rows(Post.all) } end end end def test_query_cache_dups_results_correctly Task.cache do now = Time.now.utc task = Task.find 1 assert_not_equal now, task.starting task.starting = now task.reload assert_not_equal now, task.starting end end def test_cache_does_not_raise_exceptions logger = ShouldNotHaveExceptionsLogger.new subscriber = ActiveSupport::Notifications.subscribe "sql.active_record", logger ActiveRecord::Base.cache do assert_queries(1) { Task.find(1); Task.find(1) } end assert_not_predicate logger, :exception? ensure ActiveSupport::Notifications.unsubscribe subscriber end def test_query_cache_does_not_allow_sql_key_mutation subscriber = ActiveSupport::Notifications.subscribe("sql.active_record") do |_, _, _, _, payload| payload[:sql].downcase! end assert_raises RuntimeError do ActiveRecord::Base.cache do assert_queries(1) { Task.find(1); Task.find(1) } end end ensure ActiveSupport::Notifications.unsubscribe subscriber end def test_cache_is_flat Task.cache do assert_queries(1) { Topic.find(1); Topic.find(1); } end ActiveRecord::Base.cache do assert_queries(1) { Task.find(1); Task.find(1) } end end def test_cache_does_not_wrap_string_results_in_arrays Task.cache do # Oracle adapter returns count() as Integer or Float if current_adapter?(:OracleAdapter) assert_kind_of Numeric, Task.connection.select_value("SELECT count(*) AS count_all FROM tasks") elsif current_adapter?(:SQLite3Adapter, :Mysql2Adapter, :PostgreSQLAdapter) # Future versions of the sqlite3 adapter will return numeric assert_instance_of 0.class, Task.connection.select_value("SELECT count(*) AS count_all FROM tasks") else assert_instance_of String, Task.connection.select_value("SELECT count(*) AS count_all FROM tasks") end end end def test_cache_is_ignored_for_locked_relations task = Task.find 1 Task.cache do assert_queries(2) { task.lock!; task.lock! } end end def test_cache_is_available_when_using_a_not_connected_connection skip "In-Memory DB can't test for using a not connected connection" if in_memory_db? with_temporary_connection_pool do spec_name = Task.connection_specification_name conf = ActiveRecord::Base.configurations["arunit"].merge("name" => "test2") ActiveRecord::Base.connection_handler.establish_connection(conf) Task.connection_specification_name = "test2" refute Task.connected? Task.cache do begin assert_queries(1) { Task.find(1); Task.find(1) } ensure ActiveRecord::Base.connection_handler.remove_connection(Task.connection_specification_name) Task.connection_specification_name = spec_name end end end end def test_query_cache_executes_new_queries_within_block ActiveRecord::Base.connection.enable_query_cache! # Warm up the cache by running the query assert_queries(1) do assert_equal 0, Post.where(title: "test").to_a.count end # Check that if the same query is run again, no queries are executed assert_queries(0) do assert_equal 0, Post.where(title: "test").to_a.count end ActiveRecord::Base.connection.uncached do # Check that new query is executed, avoiding the cache assert_queries(1) do assert_equal 0, Post.where(title: "test").to_a.count end end end def test_query_cache_doesnt_leak_cached_results_of_rolled_back_queries ActiveRecord::Base.connection.enable_query_cache! post = Post.first Post.transaction do post.update_attributes(title: "rollback") assert_equal 1, Post.where(title: "rollback").to_a.count raise ActiveRecord::Rollback end assert_equal 0, Post.where(title: "rollback").to_a.count ActiveRecord::Base.connection.uncached do assert_equal 0, Post.where(title: "rollback").to_a.count end begin Post.transaction do post.update_attributes(title: "rollback") assert_equal 1, Post.where(title: "rollback").to_a.count raise "broken" end rescue Exception end assert_equal 0, Post.where(title: "rollback").to_a.count ActiveRecord::Base.connection.uncached do assert_equal 0, Post.where(title: "rollback").to_a.count end end def test_query_cached_even_when_types_are_reset Task.cache do # Warm the cache Task.find(1) Task.connection.type_map.clear # Preload the type cache again (so we don't have those queries issued during our assertions) Task.connection.send(:initialize_type_map, Task.connection.type_map) # Clear places where type information is cached Task.reset_column_information Task.initialize_find_by_cache assert_queries(0) do Task.find(1) end end end def test_query_cache_does_not_establish_connection_if_unconnected with_temporary_connection_pool do ActiveRecord::Base.clear_active_connections! refute ActiveRecord::Base.connection_handler.active_connections? # sanity check middleware { refute ActiveRecord::Base.connection_handler.active_connections?, "QueryCache forced ActiveRecord::Base to establish a connection in setup" }.call({}) refute ActiveRecord::Base.connection_handler.active_connections?, "QueryCache forced ActiveRecord::Base to establish a connection in cleanup" end end def test_query_cache_is_enabled_on_connections_established_after_middleware_runs with_temporary_connection_pool do ActiveRecord::Base.clear_active_connections! refute ActiveRecord::Base.connection_handler.active_connections? # sanity check middleware { assert ActiveRecord::Base.connection.query_cache_enabled, "QueryCache did not get lazily enabled" }.call({}) end end def test_query_caching_is_local_to_the_current_thread with_temporary_connection_pool do ActiveRecord::Base.clear_active_connections! middleware { assert ActiveRecord::Base.connection_pool.query_cache_enabled assert ActiveRecord::Base.connection.query_cache_enabled Thread.new { refute ActiveRecord::Base.connection_pool.query_cache_enabled refute ActiveRecord::Base.connection.query_cache_enabled }.join }.call({}) end end private def middleware(&app) executor = Class.new(ActiveSupport::Executor) ActiveRecord::QueryCache.install_executor_hooks executor lambda { |env| executor.wrap { app.call(env) } } end def assert_cache(state, connection = ActiveRecord::Base.connection) case state when :off assert !connection.query_cache_enabled, "cache should be off" assert connection.query_cache.empty?, "cache should be empty" when :clean assert connection.query_cache_enabled, "cache should be on" assert connection.query_cache.empty?, "cache should be empty" when :dirty assert connection.query_cache_enabled, "cache should be on" assert !connection.query_cache.empty?, "cache should be dirty" else raise "unknown state" end end end class QueryCacheExpiryTest < ActiveRecord::TestCase fixtures :tasks, :posts, :categories, :categories_posts def teardown Task.connection.clear_query_cache end def test_cache_gets_cleared_after_migration # warm the cache Post.find(1) # change the column definition Post.connection.change_column :posts, :title, :string, limit: 80 assert_nothing_raised { Post.find(1) } # restore the old definition Post.connection.change_column :posts, :title, :string end def test_find assert_called(Task.connection, :clear_query_cache) do assert !Task.connection.query_cache_enabled Task.cache do assert Task.connection.query_cache_enabled Task.find(1) Task.uncached do assert !Task.connection.query_cache_enabled Task.find(1) end assert Task.connection.query_cache_enabled end assert !Task.connection.query_cache_enabled end end def test_update assert_called(Task.connection, :clear_query_cache, times: 2) do Task.cache do task = Task.find(1) task.starting = Time.now.utc task.save! end end end def test_destroy assert_called(Task.connection, :clear_query_cache, times: 2) do Task.cache do Task.find(1).destroy end end end def test_insert assert_called(ActiveRecord::Base.connection, :clear_query_cache, times: 2) do Task.cache do Task.create! end end end def test_cache_is_expired_by_habtm_update assert_called(ActiveRecord::Base.connection, :clear_query_cache, times: 2) do ActiveRecord::Base.cache do c = Category.first p = Post.first p.categories << c end end end def test_cache_is_expired_by_habtm_delete assert_called(ActiveRecord::Base.connection, :clear_query_cache, times: 2) do ActiveRecord::Base.cache do p = Post.find(1) assert p.categories.any? p.categories.delete_all end end end test "threads use the same connection" do @connection_1 = ActiveRecord::Base.connection.object_id thread_a = Thread.new do @connection_2 = ActiveRecord::Base.connection.object_id end thread_a.join assert_equal @connection_1, @connection_2 end end