From 3e6d3e430e53c550e3c282af6f23b803e1652b15 Mon Sep 17 00:00:00 2001
From: Patrick Rebsch <pjrebsch@gmail.com>
Date: Fri, 1 Mar 2019 20:31:59 -0500
Subject: [PATCH] Quote empty ranges like other empty enumerables

---
 activerecord/CHANGELOG.md                      |  4 ++++
 activerecord/lib/active_record/sanitization.rb |  5 +++--
 activerecord/test/cases/sanitize_test.rb       | 13 +++++++++++++
 3 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index cff6a3147b..c0ef3cbe7c 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,3 +1,7 @@
+*   Quote empty ranges like other empty enumerables.
+
+    *Patrick Rebsch*
+
 *   Add `insert_all`/`insert_all!`/`upsert_all` methods to `ActiveRecord::Persistence`,
     allowing bulk inserts akin to the bulk updates provided by `update_all` and
     bulk deletes by `delete_all`.
diff --git a/activerecord/lib/active_record/sanitization.rb b/activerecord/lib/active_record/sanitization.rb
index e6197752bc..750766714d 100644
--- a/activerecord/lib/active_record/sanitization.rb
+++ b/activerecord/lib/active_record/sanitization.rb
@@ -165,10 +165,11 @@ module ActiveRecord
 
         def quote_bound_value(value, c = connection)
           if value.respond_to?(:map) && !value.acts_like?(:string)
-            if value.respond_to?(:empty?) && value.empty?
+            quoted = value.map { |v| c.quote(v) }
+            if quoted.empty?
               c.quote(nil)
             else
-              value.map { |v| c.quote(v) }.join(",")
+              quoted.join(",")
             end
           else
             c.quote(value)
diff --git a/activerecord/test/cases/sanitize_test.rb b/activerecord/test/cases/sanitize_test.rb
index 18b27bd6d1..6c884b4f45 100644
--- a/activerecord/test/cases/sanitize_test.rb
+++ b/activerecord/test/cases/sanitize_test.rb
@@ -148,6 +148,19 @@ class SanitizeTest < ActiveRecord::TestCase
     assert_equal "foo in (#{quoted_nil})", bind("foo in (?)", [])
   end
 
+  def test_bind_range
+    quoted_abc = %(#{ActiveRecord::Base.connection.quote('a')},#{ActiveRecord::Base.connection.quote('b')},#{ActiveRecord::Base.connection.quote('c')})
+    assert_equal "0", bind("?", 0..0)
+    assert_equal "1,2,3", bind("?", 1..3)
+    assert_equal quoted_abc, bind("?", "a"..."d")
+  end
+
+  def test_bind_empty_range
+    quoted_nil = ActiveRecord::Base.connection.quote(nil)
+    assert_equal quoted_nil, bind("?", 0...0)
+    assert_equal quoted_nil, bind("?", "a"..."a")
+  end
+
   def test_bind_empty_string
     quoted_empty = ActiveRecord::Base.connection.quote("")
     assert_equal quoted_empty, bind("?", "")