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166b63eb67
Perform an efficient existence query through #exists? instead of loading the entire relation into memory and searching it.
Before:
> Person.where(name: "David").include?(david)
SELECT `people`.* FROM `people` WHERE `people`.`name` = 'David'
=> true
After:
> Person.where(name: "David").include?(david)
SELECT 1 AS one FROM `people` WHERE `people`.`name` = 'David' AND `people`.`id` = 1 LIMIT 1
=> true
76 lines
2.5 KiB
Ruby
76 lines
2.5 KiB
Ruby
# frozen_string_literal: true
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require "cases/helper"
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require "models/post"
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require "models/comment"
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require "active_support/core_ext/symbol/starts_ends_with"
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module ActiveRecord
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module DelegationTests
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ARRAY_DELEGATES = [
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:+, :-, :|, :&, :[], :shuffle,
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:all?, :collect, :compact, :detect, :each, :each_cons, :each_with_index,
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:exclude?, :find_all, :flat_map, :group_by, :include?, :length,
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:map, :none?, :one?, :partition, :reject, :reverse, :rotate,
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:sample, :second, :sort, :sort_by, :slice, :third, :index, :rindex,
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:to_ary, :to_set, :to_xml, :to_yaml, :join,
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:in_groups, :in_groups_of, :to_sentence, :to_formatted_s, :as_json
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]
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ARRAY_DELEGATES.each do |method|
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define_method "test_delegates_#{method}_to_Array" do
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assert_respond_to target, method
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end
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end
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def test_not_respond_to_arel_method
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assert_not_respond_to target, :exists
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end
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end
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class DelegationAssociationTest < ActiveRecord::TestCase
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include DelegationTests
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def target
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Post.new.comments
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end
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end
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class DelegationRelationTest < ActiveRecord::TestCase
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include DelegationTests
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def target
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Comment.all
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end
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end
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class QueryingMethodsDelegationTest < ActiveRecord::TestCase
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QUERYING_METHODS =
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ActiveRecord::Batches.public_instance_methods(false) +
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ActiveRecord::Calculations.public_instance_methods(false) +
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ActiveRecord::FinderMethods.public_instance_methods(false) - [:include?, :member?, :raise_record_not_found_exception!] +
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ActiveRecord::SpawnMethods.public_instance_methods(false) - [:spawn, :merge!] +
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ActiveRecord::QueryMethods.public_instance_methods(false).reject { |method|
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method.end_with?("=", "!", "value", "values", "clause")
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} - [:reverse_order, :arel, :extensions, :construct_join_dependency] + [
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:any?, :many?, :none?, :one?,
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:first_or_create, :first_or_create!, :first_or_initialize,
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:find_or_create_by, :find_or_create_by!, :find_or_initialize_by,
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:create_or_find_by, :create_or_find_by!,
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:destroy_all, :delete_all, :update_all, :touch_all, :delete_by, :destroy_by
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]
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def test_delegate_querying_methods
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klass = Class.new(ActiveRecord::Base) do
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self.table_name = "posts"
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end
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assert_equal QUERYING_METHODS.sort, ActiveRecord::Querying::QUERYING_METHODS.sort
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QUERYING_METHODS.each do |method|
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assert_respond_to klass.all, method
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assert_respond_to klass, method
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end
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end
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end
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end
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