From 3e43ea377f2e8c72a463ba17d07c0d788eb8ed6d Mon Sep 17 00:00:00 2001
From: Alex Reisner <alex@alexreisner.com>
Date: Wed, 17 Oct 2012 12:25:30 -0400
Subject: [PATCH] Add special :id_only value for :select option.
This allows selecting only the id column for cases where a single column
result is required (ie, a subquery used as an operand to the 'IN'
operator). This addresses issue #314.
---
lib/geocoder/stores/active_record.rb | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/lib/geocoder/stores/active_record.rb b/lib/geocoder/stores/active_record.rb
index 985a0759..b49a4a97 100644
--- a/lib/geocoder/stores/active_record.rb
+++ b/lib/geocoder/stores/active_record.rb
@@ -157,8 +157,10 @@ module Geocoder::Store
##
# Generate the SELECT clause.
#
- def select_clause(columns, distance, bearing = nil)
- if columns == :geo_only
+ def select_clause(columns, distance = nil, bearing = nil)
+ if columns == :id_only
+ return full_column_name(primary_key)
+ elsif columns == :geo_only
clause = ""
else
clause = (columns || full_column_name("*")) + ", "
--
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