Deprecate expand_hash_conditions_for_aggregates

This can not expand an array of aggregated objects correctly, and is no
longer used internally since 159b21b5.

activerecord/CHANGELOG.md

@@ -1,3 +1,8 @@
+*   Deprecate `expand_hash_conditions_for_aggregates` without replacement.
+    Using a `Relation` for performing queries is the prefered API.
+
+    *Ryuta Kamizono*
+
 *   Fix not expanded problem when passing an Array object as argument to the where method using `composed_of` column.
 
     ```

activerecord/lib/active_record/sanitization.rb

@@ -169,6 +169,7 @@ module ActiveRecord
           end
           expanded_attrs
         end
+        deprecate :expand_hash_conditions_for_aggregates
 
         def replace_bind_variables(statement, values)
           raise_if_bind_arity_mismatch(statement, statement.count("?"), values.size)

activerecord/test/cases/sanitize_test.rb

@@ -4,6 +4,7 @@ require "cases/helper"
 require "models/binary"
 require "models/author"
 require "models/post"
+require "models/customer"
 
 class SanitizeTest < ActiveRecord::TestCase
   def setup
@@ -167,6 +168,12 @@ class SanitizeTest < ActiveRecord::TestCase
     assert_equal "#{ActiveRecord::Base.connection.quote('10')}::integer '2009-01-01'::date", l.call
   end
 
+  def test_deprecated_expand_hash_conditions_for_aggregates
+    assert_deprecated do
+      assert_equal({ "balance" => 50 }, Customer.send(:expand_hash_conditions_for_aggregates, balance: Money.new(50)))
+    end
+  end
+
   private
     def bind(statement, *vars)
       if vars.first.is_a?(Hash)