2 files changed, 1 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index 0dcecbd42d..55fd0e0b52 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -552,8 +552,6 @@ module ActiveRecord
         WhereChain.new(spawn)
       elsif opts.blank?
         self
-      elsif !opts.is_a?(String) && !opts.respond_to?(:to_h)
-        raise ArgumentError, "Unsupported argument type: #{opts} (#{opts.class})"
       else
         spawn.where!(opts, *rest)
       end
diff --git a/activerecord/lib/active_record/relation/where_clause_factory.rb b/activerecord/lib/active_record/relation/where_clause_factory.rb
index 83ac074f97..9662756c2e 100644
--- a/activerecord/lib/active_record/relation/where_clause_factory.rb
+++ b/activerecord/lib/active_record/relation/where_clause_factory.rb
@@ -21,7 +21,7 @@ module ActiveRecord
 
           parts = predicate_builder.build_from_hash(attributes)
         else
-          parts = [opts]
+          raise ArgumentError, "Unsupported argument type: #{opts} (#{opts.class})"
         end
 
         WhereClause.new(parts, binds)