From 7663376f0708118694874c2670f0053c4143bc3f Mon Sep 17 00:00:00 2001
From: Jake Worth <jakeworth82@gmail.com>
Date: Mon, 12 Oct 2015 23:28:26 -0500
Subject: `where` raises ArgumentError on unsupported types.

[#20473]
---
 activerecord/lib/active_record/relation/query_methods.rb | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'activerecord/lib/active_record')

diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index 55fd0e0b52..0dcecbd42d 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -552,6 +552,8 @@ 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
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