Support bulk insert/upsert on relation to preserve scope values

This allows to work `author.books.insert_all` as expected.
Co-authored-by: NJosef Šimánek <josef.simanek@gmail.com>

activerecord/CHANGELOG.md

+*   Support bulk insert/upsert on relation to preserve scope values.
+
+    *Josef Šimánek*, *Ryuta Kamizono*
+
 *   Preserve column comment value on changing column name on MySQL.
 
     *Islam Taha*

activerecord/lib/active_record/association_relation.rb

@@ -31,6 +31,18 @@ def create!(attributes = nil, &block)
       scoping { @association.create!(attributes, &block) }
     end
 
+    %w(insert insert_all insert! insert_all! upsert upsert_all).each do |method|
+      class_eval <<~RUBY
+        def #{method}(attributes, **kwargs)
+          if @association.reflection.through_reflection?
+            raise ArgumentError, "Bulk insert or upsert is currently not supported for has_many through association"
+          end
+
+          scoping { klass.#{method}(attributes, **kwargs) }
+        end
+      RUBY
+    end
+
     private
       def exec_queries
         super do |record|

activerecord/lib/active_record/associations/collection_proxy.rb

@@ -1096,7 +1096,9 @@ def reset_scope # :nodoc:
         SpawnMethods,
       ].flat_map { |klass|
         klass.public_instance_methods(false)
-      } - self.public_instance_methods(false) - [:select] + [:scoping, :values]
+      } - self.public_instance_methods(false) - [:select] + [
+        :scoping, :values, :insert, :insert_all, :insert!, :insert_all!, :upsert, :upsert_all
+      ]
 
       delegate(*delegate_methods, to: :scope)
 

activerecord/lib/active_record/insert_all.rb

@@ -10,9 +10,15 @@ class InsertAll # :nodoc:
     def initialize(model, inserts, on_duplicate:, returning: nil, unique_by: nil)
       raise ArgumentError, "Empty list of attributes passed" if inserts.blank?
 
-      @model, @connection, @inserts, @keys = model, model.connection, inserts, inserts.first.keys.map(&:to_s).to_set
+      @model, @connection, @inserts, @keys = model, model.connection, inserts, inserts.first.keys.map(&:to_s)
       @on_duplicate, @returning, @unique_by = on_duplicate, returning, unique_by
 
+      if model.scope_attributes?
+        @scope_attributes = model.scope_attributes
+        @keys |= @scope_attributes.keys
+      end
+      @keys = @keys.to_set
+
       @returning = (connection.supports_insert_returning? ? primary_keys : false) if @returning.nil?
       @returning = false if @returning == []
 
@@ -49,6 +55,8 @@ def update_duplicates?
     def map_key_with_value
       inserts.map do |attributes|
         attributes = attributes.stringify_keys
+        attributes.merge!(scope_attributes) if scope_attributes
+
         verify_attributes(attributes)
 
         keys.map do |key|
@@ -58,6 +66,8 @@ def map_key_with_value
     end
 
     private
+      attr_reader :scope_attributes
+
       def find_unique_index_for(unique_by)
         name_or_columns = unique_by || model.primary_key
         match = Array(name_or_columns).map(&:to_s)

activerecord/test/cases/insert_all_test.rb

 # frozen_string_literal: true
 
 require "cases/helper"
+require "models/author"
 require "models/book"
 require "models/speedometer"
+require "models/subscription"
+require "models/subscriber"
 
 class ReadonlyNameBook < Book
   attr_readonly :name
@@ -341,6 +344,62 @@ def test_insert_all_with_enum_values
     assert_equal ["published", "proposed"], Book.where(isbn: ["1234566", "1234567"]).order(:id).pluck(:status)
   end
 
+  def test_insert_all_on_relation
+    author = Author.create!(name: "Jimmy")
+
+    assert_difference "author.books.count", +1 do
+      author.books.insert_all!([{ name: "My little book", isbn: "1974522598" }])
+    end
+  end
+
+  def test_insert_all_on_relation_precedence
+    author = Author.create!(name: "Jimmy")
+    second_author = Author.create!(name: "Bob")
+
+    assert_difference "author.books.count", +1 do
+      author.books.insert_all!([{ name: "My little book", isbn: "1974522598", author_id: second_author.id }])
+    end
+  end
+
+  def test_insert_all_create_with
+    assert_difference "Book.where(format: 'X').count", +2 do
+      Book.create_with(format: "X").insert_all!([ { name: "A" }, { name: "B" } ])
+    end
+  end
+
+  def test_insert_all_has_many_through
+    book = Book.first
+    assert_raise(ArgumentError) { book.subscribers.insert_all!([ { nick: "Jimmy" } ]) }
+  end
+
+  def test_upsert_all_on_relation
+    author = Author.create!(name: "Jimmy")
+
+    assert_difference "author.books.count", +1 do
+      author.books.upsert_all([{ name: "My little book", isbn: "1974522598" }])
+    end
+  end
+
+  def test_upsert_all_on_relation_precedence
+    author = Author.create!(name: "Jimmy")
+    second_author = Author.create!(name: "Bob")
+
+    assert_difference "author.books.count", +1 do
+      author.books.upsert_all([{ name: "My little book", isbn: "1974522598", author_id: second_author.id }])
+    end
+  end
+
+  def test_upsert_all_create_with
+    assert_difference "Book.where(format: 'X').count", +2 do
+      Book.create_with(format: "X").upsert_all([ { name: "A" }, { name: "B" } ])
+    end
+  end
+
+  def test_upsert_all_has_many_through
+    book = Book.first
+    assert_raise(ArgumentError) { book.subscribers.upsert_all([ { nick: "Jimmy" } ]) }
+  end
+
   private
     def capture_log_output
       output = StringIO.new