Account:: namespace simplifications and cleanup (#2110)

* Flatten Holding model

* Flatten balance model

* Entries domain renames

* Fix valuations reference

* Fix trades stream

* Fix brakeman warnings

* Fix tests

* Replace existing entryable type references in DB

test/controllers/transactions/bulk_updates_controller_test.rb

@@ -0,0 +1,35 @@
+require "test_helper"
+
+class Transactions::BulkUpdatesControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    sign_in @user = users(:family_admin)
+  end
+
+  test "bulk update" do
+    transactions = @user.family.entries.transactions
+
+    assert_difference [ "Entry.count", "Transaction.count" ], 0 do
+      post transactions_bulk_update_url, params: {
+        bulk_update: {
+          entry_ids: transactions.map(&:id),
+          date: 1.day.ago.to_date,
+          category_id: Category.second.id,
+          merchant_id: Merchant.second.id,
+          tag_ids: [ Tag.first.id, Tag.second.id ],
+          notes: "Updated note"
+        }
+      }
+    end
+
+    assert_redirected_to transactions_url
+    assert_equal "#{transactions.count} transactions updated", flash[:notice]
+
+    transactions.reload.each do |transaction|
+      assert_equal 1.day.ago.to_date, transaction.date
+      assert_equal Category.second, transaction.transaction.category
+      assert_equal Merchant.second, transaction.transaction.merchant
+      assert_equal "Updated note", transaction.notes
+      assert_equal [ Tag.first.id, Tag.second.id ], transaction.entryable.tag_ids.sort
+    end
+  end
+end