Fix `destroy_all` for `has_many :through` associations that points to a CPK model

activerecord/lib/active_record/associations/through_association.rb

@@ -62,9 +62,8 @@ module ActiveRecord
           if Array(association_primary_key) == reflection.klass.composite_query_constraints_list && !options[:source_type]
             join_attributes = { source_reflection.name => records }
           else
-            join_attributes = {
-              source_reflection.foreign_key => records.map(&association_primary_key.to_sym)
-            }
+            assoc_pk_values = records.map { |record| record._read_attribute(association_primary_key) }
+            join_attributes = { source_reflection.foreign_key => assoc_pk_values }
           end
 
           if options[:source_type]

activerecord/test/cases/associations/has_many_through_associations_test.rb

@@ -37,13 +37,15 @@ require "models/section"
 require "models/seminar"
 require "models/session"
 require "models/sharded"
+require "models/cpk"
 
 class HasManyThroughAssociationsTest < ActiveRecord::TestCase
   fixtures :posts, :readers, :people, :comments, :authors, :categories, :taggings, :tags,
            :owners, :pets, :toys, :jobs, :references, :companies, :members, :author_addresses,
            :subscribers, :books, :subscriptions, :developers, :categorizations, :essays,
            :categories_posts, :clubs, :memberships, :organizations, :author_favorites,
-           :sharded_blog_posts, :sharded_tags, :sharded_blog_posts_tags
+           :sharded_blog_posts, :sharded_tags, :sharded_blog_posts_tags, :cpk_orders, :cpk_tags,
+           :cpk_order_tags
 
   # Dummies to force column loads so query counts are clean.
   def setup
@@ -440,6 +442,16 @@ class HasManyThroughAssociationsTest < ActiveRecord::TestCase
     assert_empty posts(:welcome).people.reload
   end
 
+  def test_destroy_all_on_composite_primary_key_model
+    tag = cpk_tags(:cpk_tag_loyal_customer)
+
+    assert_not_empty(tag.orders.to_a)
+
+    tag.orders.destroy_all
+    assert_empty(tag.orders)
+    assert_empty(tag.orders.reload)
+  end
+
   def test_destroy_all_on_association_clears_scope
     post = Post.create!(title: "Rails 6", body: "")
     people = post.people

activerecord/test/fixtures/cpk_order_tags.yml

@@ -0,0 +1,15 @@
+_fixture:
+  model_class: Cpk::OrderTag
+
+cpk_first_order_loyal_customer:
+  tag_id: <%= ActiveRecord::FixtureSet.identify(:cpk_tag_loyal_customer) %>
+  order_id: <%= ActiveRecord::FixtureSet.composite_identify(:cpk_groceries_order_1, [:shop_id, :id])[:id] %>
+
+cpk_second_order_loyal_customer:
+  tag_id: <%= ActiveRecord::FixtureSet.identify(:cpk_tag_loyal_customer) %>
+  order_id: <%= ActiveRecord::FixtureSet.composite_identify(:cpk_groceries_order_2, [:shop_id, :id])[:id] %>
+
+cpk_first_order_digital_product:
+  tag_id: <%= ActiveRecord::FixtureSet.identify(:cpk_tag_digital_product) %>
+  order_id: <%= ActiveRecord::FixtureSet.composite_identify(:cpk_groceries_order_1, [:shop_id, :id])[:id] %>
+

activerecord/test/fixtures/cpk_tags.yml

@@ -0,0 +1,11 @@
+_fixture:
+  model_class: Cpk::Tag
+
+cpk_tag_loyal_customer:
+  name: "Loyal customer"
+
+cpk_tag_digital_product:
+  name: "Digital product"
+
+cpk_tag_ruby_on_rails:
+  name: "Ruby on Rails"

activerecord/test/models/cpk.rb

@@ -5,3 +5,5 @@ require_relative "cpk/book"
 require_relative "cpk/order"
 require_relative "cpk/review"
 require_relative "cpk/order_agreement"
+require_relative "cpk/order_tag"
+require_relative "cpk/tag"

activerecord/test/models/cpk/order_tag.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+module Cpk
+  class OrderTag < ActiveRecord::Base
+    self.table_name = :cpk_order_tags
+
+    belongs_to :tag
+    belongs_to :order, primary_key: :id
+  end
+end

activerecord/test/models/cpk/tag.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+module Cpk
+  class Tag < ActiveRecord::Base
+    self.table_name = :cpk_tags
+
+    has_many :order_tags
+    has_many :orders, through: :order_tags
+  end
+end

activerecord/test/schema/schema.rb

@@ -267,6 +267,15 @@ ActiveRecord::Schema.define do
     t.string :status
   end
 
+  create_table :cpk_order_tags, force: true do |t|
+    t.integer :order_id
+    t.integer :tag_id
+  end
+
+  create_table :cpk_tags, force: true do |t|
+    t.string :name, null: false
+  end
+
   create_table :cpk_order_agreements, force: true do |t|
     t.integer :order_id
     t.string :signature