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80e73ad7c1
The previous return value of nil was undocumented and inconsistent with the non-batched versions of these methods. Also lean on `each` to create the batches, and add API documentation for `update_all`, `delete_all`, and `destroy_all` on `BatchEnumerator`.
695 lines
20 KiB
Ruby
695 lines
20 KiB
Ruby
# frozen_string_literal: true
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require "cases/helper"
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require "models/comment"
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require "models/post"
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require "models/subscriber"
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class EachTest < ActiveRecord::TestCase
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fixtures :posts, :subscribers
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def setup
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@posts = Post.order("id asc")
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@total = Post.count
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Post.count("id") # preheat arel's table cache
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end
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def test_each_should_execute_one_query_per_batch
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assert_queries(@total + 1) do
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Post.find_each(batch_size: 1) do |post|
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assert_kind_of Post, post
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end
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end
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end
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def test_each_should_not_return_query_chain_and_execute_only_one_query
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assert_queries(1) do
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result = Post.find_each(batch_size: 100000) { }
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assert_nil result
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end
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end
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def test_each_should_return_an_enumerator_if_no_block_is_present
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assert_queries(1) do
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Post.find_each(batch_size: 100000).with_index do |post, index|
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assert_kind_of Post, post
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assert_kind_of Integer, index
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end
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end
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end
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def test_each_should_return_a_sized_enumerator
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assert_equal 11, Post.find_each(batch_size: 1).size
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assert_equal 5, Post.find_each(batch_size: 2, start: 7).size
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assert_equal 11, Post.find_each(batch_size: 10_000).size
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end
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def test_each_enumerator_should_execute_one_query_per_batch
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assert_queries(@total + 1) do
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Post.find_each(batch_size: 1).with_index do |post, index|
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assert_kind_of Post, post
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assert_kind_of Integer, index
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end
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end
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end
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def test_each_should_raise_if_select_is_set_without_id
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assert_raise(ArgumentError) do
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Post.select(:title).find_each(batch_size: 1) { |post|
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flunk "should not call this block"
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}
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end
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end
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def test_each_should_execute_if_id_is_in_select
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assert_queries(6) do
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Post.select("id, title, type").find_each(batch_size: 2) do |post|
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assert_kind_of Post, post
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end
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end
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end
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test "find_each should honor limit if passed a block" do
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limit = @total - 1
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total = 0
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Post.limit(limit).find_each do |post|
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total += 1
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end
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assert_equal limit, total
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end
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test "find_each should honor limit if no block is passed" do
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limit = @total - 1
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total = 0
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Post.limit(limit).find_each.each do |post|
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total += 1
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end
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assert_equal limit, total
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end
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def test_warn_if_order_scope_is_set
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assert_called(ActiveRecord::Base.logger, :warn) do
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Post.order("title").find_each { |post| post }
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end
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end
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def test_logger_not_required
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previous_logger = ActiveRecord::Base.logger
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ActiveRecord::Base.logger = nil
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assert_nothing_raised do
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Post.order("comments_count DESC").find_each { |post| post }
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end
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ensure
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ActiveRecord::Base.logger = previous_logger
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end
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def test_find_in_batches_should_return_batches
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assert_queries(@total + 1) do
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Post.find_in_batches(batch_size: 1) do |batch|
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assert_kind_of Array, batch
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assert_kind_of Post, batch.first
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end
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end
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end
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def test_find_in_batches_should_start_from_the_start_option
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assert_queries(@total) do
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Post.find_in_batches(batch_size: 1, start: 2) do |batch|
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assert_kind_of Array, batch
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assert_kind_of Post, batch.first
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end
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end
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end
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def test_find_in_batches_should_end_at_the_finish_option
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assert_queries(6) do
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Post.find_in_batches(batch_size: 1, finish: 5) do |batch|
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assert_kind_of Array, batch
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assert_kind_of Post, batch.first
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end
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end
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end
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def test_find_in_batches_shouldnt_execute_query_unless_needed
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assert_queries(2) do
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Post.find_in_batches(batch_size: @total) { |batch| assert_kind_of Array, batch }
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end
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assert_queries(1) do
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Post.find_in_batches(batch_size: @total + 1) { |batch| assert_kind_of Array, batch }
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end
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end
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def test_find_in_batches_should_quote_batch_order
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c = Post.connection
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assert_sql(/ORDER BY #{Regexp.escape(c.quote_table_name("posts.id"))}/i) do
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Post.find_in_batches(batch_size: 1) do |batch|
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assert_kind_of Array, batch
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assert_kind_of Post, batch.first
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end
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end
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end
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def test_find_in_batches_should_quote_batch_order_with_desc_order
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c = Post.connection
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assert_sql(/ORDER BY #{Regexp.escape(c.quote_table_name("posts.id"))} DESC/) do
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Post.find_in_batches(batch_size: 1, order: :desc) do |batch|
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assert_kind_of Array, batch
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assert_kind_of Post, batch.first
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end
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end
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end
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def test_each_should_raise_if_order_is_invalid
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assert_raise(ArgumentError) do
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Post.select(:title).find_each(batch_size: 1, order: :invalid) { |post|
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flunk "should not call this block"
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}
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end
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end
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def test_find_in_batches_should_not_use_records_after_yielding_them_in_case_original_array_is_modified
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not_a_post = +"not a post"
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def not_a_post.id; end
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not_a_post.stub(:id, -> { raise StandardError.new("not_a_post had #id called on it") }) do
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assert_nothing_raised do
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Post.find_in_batches(batch_size: 1) do |batch|
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assert_kind_of Array, batch
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assert_kind_of Post, batch.first
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batch.map! { not_a_post }
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end
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end
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end
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end
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def test_find_in_batches_should_ignore_the_order_default_scope
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# First post is with title scope
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first_post = PostWithDefaultScope.first
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posts = []
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PostWithDefaultScope.find_in_batches do |batch|
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posts.concat(batch)
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end
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# posts.first will be ordered using id only. Title order scope should not apply here
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assert_not_equal first_post, posts.first
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assert_equal posts(:welcome).id, posts.first.id
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end
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def test_find_in_batches_should_error_on_ignore_the_order
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assert_raise(ArgumentError) do
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PostWithDefaultScope.find_in_batches(error_on_ignore: true) { }
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end
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end
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def test_find_in_batches_should_not_error_if_config_overridden
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# Set the config option which will be overridden
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prev = ActiveRecord::Base.error_on_ignored_order
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ActiveRecord::Base.error_on_ignored_order = true
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assert_nothing_raised do
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PostWithDefaultScope.find_in_batches(error_on_ignore: false) { }
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end
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ensure
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# Set back to default
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ActiveRecord::Base.error_on_ignored_order = prev
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end
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def test_find_in_batches_should_error_on_config_specified_to_error
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# Set the config option
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prev = ActiveRecord::Base.error_on_ignored_order
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ActiveRecord::Base.error_on_ignored_order = true
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assert_raise(ArgumentError) do
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PostWithDefaultScope.find_in_batches() { }
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end
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ensure
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# Set back to default
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ActiveRecord::Base.error_on_ignored_order = prev
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end
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def test_find_in_batches_should_not_error_by_default
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assert_nothing_raised do
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PostWithDefaultScope.find_in_batches() { }
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end
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end
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def test_find_in_batches_should_not_ignore_the_default_scope_if_it_is_other_then_order
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default_scope = SpecialPostWithDefaultScope.all
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posts = []
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SpecialPostWithDefaultScope.find_in_batches do |batch|
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posts.concat(batch)
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end
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assert_equal default_scope.pluck(:id).sort, posts.map(&:id).sort
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end
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def test_find_in_batches_should_use_any_column_as_primary_key
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nick_order_subscribers = Subscriber.order("nick asc")
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start_nick = nick_order_subscribers.second.nick
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subscribers = []
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Subscriber.find_in_batches(batch_size: 1, start: start_nick) do |batch|
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subscribers.concat(batch)
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end
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assert_equal nick_order_subscribers[1..-1].map(&:id), subscribers.map(&:id)
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end
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def test_find_in_batches_should_use_any_column_as_primary_key_when_start_is_not_specified
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assert_queries(Subscriber.count + 1) do
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Subscriber.find_in_batches(batch_size: 1) do |batch|
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assert_kind_of Array, batch
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assert_kind_of Subscriber, batch.first
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end
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end
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end
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def test_find_in_batches_should_return_an_enumerator
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enum = nil
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assert_no_queries do
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enum = Post.find_in_batches(batch_size: 1)
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end
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assert_queries(4) do
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enum.first(4) do |batch|
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assert_kind_of Array, batch
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assert_kind_of Post, batch.first
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end
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end
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end
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test "find_in_batches should honor limit if passed a block" do
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limit = @total - 1
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total = 0
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Post.limit(limit).find_in_batches do |batch|
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total += batch.size
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end
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assert_equal limit, total
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end
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test "find_in_batches should honor limit if no block is passed" do
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limit = @total - 1
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total = 0
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Post.limit(limit).find_in_batches.each do |batch|
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total += batch.size
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end
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assert_equal limit, total
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end
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def test_in_batches_should_not_execute_any_query
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assert_no_queries do
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assert_kind_of ActiveRecord::Batches::BatchEnumerator, Post.in_batches(of: 2)
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end
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end
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def test_in_batches_should_yield_relation_if_block_given
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assert_queries(6) do
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Post.in_batches(of: 2) do |relation|
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assert_kind_of ActiveRecord::Relation, relation
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end
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end
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end
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def test_in_batches_should_be_enumerable_if_no_block_given
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assert_queries(6) do
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Post.in_batches(of: 2).each do |relation|
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assert_kind_of ActiveRecord::Relation, relation
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end
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end
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end
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def test_in_batches_each_record_should_yield_record_if_block_is_given
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assert_queries(6) do
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Post.in_batches(of: 2).each_record do |post|
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assert_predicate post.title, :present?
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assert_kind_of Post, post
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end
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end
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end
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def test_in_batches_each_record_should_return_enumerator_if_no_block_given
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assert_queries(6) do
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Post.in_batches(of: 2).each_record.with_index do |post, i|
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assert_predicate post.title, :present?
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assert_kind_of Post, post
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end
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end
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end
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def test_in_batches_each_record_should_be_ordered_by_id
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ids = Post.order("id ASC").pluck(:id)
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assert_queries(6) do
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Post.in_batches(of: 2).each_record.with_index do |post, i|
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assert_equal ids[i], post.id
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end
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end
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end
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def test_in_batches_update_all_affect_all_records
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assert_queries(6 + 6) do # 6 selects, 6 updates
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Post.in_batches(of: 2).update_all(title: "updated-title")
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end
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assert_equal Post.all.pluck(:title), ["updated-title"] * Post.count
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end
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def test_in_batches_update_all_returns_rows_affected
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assert_equal 11, Post.in_batches(of: 2).update_all(title: "updated-title")
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end
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def test_in_batches_update_all_returns_zero_when_no_batches
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assert_equal 0, Post.where("1=0").in_batches(of: 2).update_all(title: "updated-title")
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end
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def test_in_batches_delete_all_should_not_delete_records_in_other_batches
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not_deleted_count = Post.where("id <= 2").count
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Post.where("id > 2").in_batches(of: 2).delete_all
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assert_equal 0, Post.where("id > 2").count
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assert_equal not_deleted_count, Post.count
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end
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def test_in_batches_delete_all_returns_rows_affected
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assert_equal 11, Post.in_batches(of: 2).delete_all
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end
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def test_in_batches_delete_all_returns_zero_when_no_batches
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assert_equal 0, Post.where("1=0").in_batches(of: 2).delete_all
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end
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def test_in_batches_should_not_be_loaded
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Post.in_batches(of: 1) do |relation|
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assert_not_predicate relation, :loaded?
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end
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Post.in_batches(of: 1, load: false) do |relation|
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assert_not_predicate relation, :loaded?
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end
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end
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def test_in_batches_should_be_loaded
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Post.in_batches(of: 1, load: true) do |relation|
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assert_predicate relation, :loaded?
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end
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end
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def test_in_batches_if_not_loaded_executes_more_queries
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assert_queries(@total + 1) do
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Post.in_batches(of: 1, load: false) do |relation|
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assert_not_predicate relation, :loaded?
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end
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end
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end
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def test_in_batches_should_return_relations
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assert_queries(@total + 1) do
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Post.in_batches(of: 1) do |relation|
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assert_kind_of ActiveRecord::Relation, relation
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end
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end
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end
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def test_in_batches_should_start_from_the_start_option
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post = Post.order("id ASC").where("id >= ?", 2).first
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assert_queries(2) do
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relation = Post.in_batches(of: 1, start: 2).first
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assert_equal post, relation.first
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end
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end
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def test_in_batches_should_end_at_the_finish_option
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post = Post.order("id DESC").where("id <= ?", 5).first
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assert_queries(7) do
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relation = Post.in_batches(of: 1, finish: 5, load: true).reverse_each.first
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assert_equal post, relation.last
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end
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end
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def test_in_batches_shouldnt_execute_query_unless_needed
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assert_queries(2) do
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Post.in_batches(of: @total) { |relation| assert_kind_of ActiveRecord::Relation, relation }
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end
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assert_queries(1) do
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Post.in_batches(of: @total + 1) { |relation| assert_kind_of ActiveRecord::Relation, relation }
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end
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end
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def test_in_batches_should_quote_batch_order
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c = Post.connection
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assert_sql(/ORDER BY #{c.quote_table_name('posts')}\.#{c.quote_column_name('id')}/) do
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Post.in_batches(of: 1) do |relation|
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assert_kind_of ActiveRecord::Relation, relation
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assert_kind_of Post, relation.first
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end
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end
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end
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def test_in_batches_should_quote_batch_order_with_desc_order
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c = Post.connection
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assert_sql(/ORDER BY #{Regexp.escape(c.quote_table_name("posts.id"))} DESC/) do
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Post.in_batches(of: 1, order: :desc) do |relation|
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assert_kind_of ActiveRecord::Relation, relation
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assert_kind_of Post, relation.first
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end
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end
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end
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def test_in_batches_should_not_use_records_after_yielding_them_in_case_original_array_is_modified
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not_a_post = +"not a post"
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def not_a_post.id
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raise StandardError.new("not_a_post had #id called on it")
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end
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assert_nothing_raised do
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Post.in_batches(of: 1) do |relation|
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assert_kind_of ActiveRecord::Relation, relation
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assert_kind_of Post, relation.first
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[not_a_post] * relation.count
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end
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end
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end
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def test_in_batches_should_not_ignore_default_scope_without_order_statements
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default_scope = SpecialPostWithDefaultScope.all
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posts = []
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SpecialPostWithDefaultScope.in_batches do |relation|
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posts.concat(relation)
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end
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assert_equal default_scope.pluck(:id).sort, posts.map(&:id).sort
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end
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def test_in_batches_should_use_any_column_as_primary_key
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nick_order_subscribers = Subscriber.order("nick asc")
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start_nick = nick_order_subscribers.second.nick
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subscribers = []
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Subscriber.in_batches(of: 1, start: start_nick) do |relation|
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subscribers.concat(relation)
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end
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assert_equal nick_order_subscribers[1..-1].map(&:id), subscribers.map(&:id)
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end
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def test_in_batches_should_use_any_column_as_primary_key_when_start_is_not_specified
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assert_queries(Subscriber.count + 1) do
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Subscriber.in_batches(of: 1, load: true) do |relation|
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assert_kind_of ActiveRecord::Relation, relation
|
|
assert_kind_of Subscriber, relation.first
|
|
end
|
|
end
|
|
end
|
|
|
|
def test_in_batches_should_return_an_enumerator
|
|
enum = nil
|
|
assert_no_queries do
|
|
enum = Post.in_batches(of: 1)
|
|
end
|
|
assert_queries(4) do
|
|
enum.first(4) do |relation|
|
|
assert_kind_of ActiveRecord::Relation, relation
|
|
assert_kind_of Post, relation.first
|
|
end
|
|
end
|
|
end
|
|
|
|
def test_in_batches_relations_should_not_overlap_with_each_other
|
|
seen_posts = []
|
|
Post.in_batches(of: 2, load: true) do |relation|
|
|
relation.to_a.each do |post|
|
|
assert_not seen_posts.include?(post)
|
|
seen_posts << post
|
|
end
|
|
end
|
|
end
|
|
|
|
def test_in_batches_relations_with_condition_should_not_overlap_with_each_other
|
|
seen_posts = []
|
|
author_id = Post.first.author_id
|
|
posts_by_author = Post.where(author_id: author_id)
|
|
Post.in_batches(of: 2) do |batch|
|
|
seen_posts += batch.where(author_id: author_id)
|
|
end
|
|
|
|
assert_equal posts_by_author.pluck(:id).sort, seen_posts.map(&:id).sort
|
|
end
|
|
|
|
def test_in_batches_relations_update_all_should_not_affect_matching_records_in_other_batches
|
|
Post.update_all(author_id: 0)
|
|
person = Post.last
|
|
person.update(author_id: 1)
|
|
|
|
Post.in_batches(of: 2) do |batch|
|
|
batch.where("author_id >= 1").update_all("author_id = author_id + 1")
|
|
end
|
|
assert_equal 2, person.reload.author_id # incremented only once
|
|
end
|
|
|
|
def test_find_in_batches_should_return_a_sized_enumerator
|
|
assert_equal 11, Post.find_in_batches(batch_size: 1).size
|
|
assert_equal 6, Post.find_in_batches(batch_size: 2).size
|
|
assert_equal 4, Post.find_in_batches(batch_size: 2, start: 4).size
|
|
assert_equal 4, Post.find_in_batches(batch_size: 3).size
|
|
assert_equal 1, Post.find_in_batches(batch_size: 10_000).size
|
|
end
|
|
|
|
[true, false].each do |load|
|
|
test "in_batches should return limit records when limit is less than batch size and load is #{load}" do
|
|
limit = 3
|
|
batch_size = 5
|
|
total = 0
|
|
|
|
Post.limit(limit).in_batches(of: batch_size, load: load) do |batch|
|
|
total += batch.count
|
|
end
|
|
|
|
assert_equal limit, total
|
|
end
|
|
|
|
test "in_batches should return limit records when limit is greater than batch size and load is #{load}" do
|
|
limit = 5
|
|
batch_size = 3
|
|
total = 0
|
|
|
|
Post.limit(limit).in_batches(of: batch_size, load: load) do |batch|
|
|
total += batch.count
|
|
end
|
|
|
|
assert_equal limit, total
|
|
end
|
|
|
|
test "in_batches should return limit records when limit is a multiple of the batch size and load is #{load}" do
|
|
limit = 6
|
|
batch_size = 3
|
|
total = 0
|
|
|
|
Post.limit(limit).in_batches(of: batch_size, load: load) do |batch|
|
|
total += batch.count
|
|
end
|
|
|
|
assert_equal limit, total
|
|
end
|
|
|
|
test "in_batches should return no records if the limit is 0 and load is #{load}" do
|
|
limit = 0
|
|
batch_size = 1
|
|
total = 0
|
|
|
|
Post.limit(limit).in_batches(of: batch_size, load: load) do |batch|
|
|
total += batch.count
|
|
end
|
|
|
|
assert_equal limit, total
|
|
end
|
|
|
|
test "in_batches should return all if the limit is greater than the number of records when load is #{load}" do
|
|
limit = @total + 1
|
|
batch_size = 1
|
|
total = 0
|
|
|
|
Post.limit(limit).in_batches(of: batch_size, load: load) do |batch|
|
|
total += batch.count
|
|
end
|
|
|
|
assert_equal @total, total
|
|
end
|
|
end
|
|
|
|
test ".find_each respects table alias" do
|
|
assert_queries(1) do
|
|
table_alias = Post.arel_table.alias("omg_posts")
|
|
table_metadata = ActiveRecord::TableMetadata.new(Post, table_alias)
|
|
predicate_builder = ActiveRecord::PredicateBuilder.new(table_metadata)
|
|
|
|
posts = ActiveRecord::Relation.create(
|
|
Post,
|
|
table: table_alias,
|
|
predicate_builder: predicate_builder
|
|
)
|
|
posts.find_each { }
|
|
end
|
|
end
|
|
|
|
test ".find_each bypasses the query cache for its own queries" do
|
|
Post.cache do
|
|
assert_queries(2) do
|
|
Post.find_each { }
|
|
Post.find_each { }
|
|
end
|
|
end
|
|
end
|
|
|
|
test ".find_each does not disable the query cache inside the given block" do
|
|
Post.cache do
|
|
Post.find_each(start: 1, finish: 1) do |post|
|
|
assert_queries(1) do
|
|
post.comments.count
|
|
post.comments.count
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
test ".find_in_batches bypasses the query cache for its own queries" do
|
|
Post.cache do
|
|
assert_queries(2) do
|
|
Post.find_in_batches { }
|
|
Post.find_in_batches { }
|
|
end
|
|
end
|
|
end
|
|
|
|
test ".find_in_batches does not disable the query cache inside the given block" do
|
|
Post.cache do
|
|
Post.find_in_batches(start: 1, finish: 1) do |batch|
|
|
assert_queries(1) do
|
|
batch.first.comments.count
|
|
batch.first.comments.count
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
test ".in_batches bypasses the query cache for its own queries" do
|
|
Post.cache do
|
|
assert_queries(2) do
|
|
Post.in_batches { }
|
|
Post.in_batches { }
|
|
end
|
|
end
|
|
end
|
|
|
|
test ".in_batches does not disable the query cache inside the given block" do
|
|
Post.cache do
|
|
Post.in_batches(start: 1, finish: 1) do |relation|
|
|
assert_queries(1) do
|
|
relation.count
|
|
relation.count
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|