Fix for issue sdsykes#17 for MSeneadza's comment:

BTW, I just tried using v 1.0.13 against a PostgreSQL db. It crashes like this "PG::Error: ERROR: column "1" does not exist
LINE 1: ...erride_fb_pic","users"."id" FROM "users" WHERE "id" IN ("1")"
That "1" is an integer and shouldn't have quotes around it.

lib/slim_scrooge/callsite.rb

@@ -5,7 +5,7 @@ module SlimScrooge
   # query is made from a particular place in the app
   #
   class Callsite
-    ScroogeComma = ",".freeze 
+    ScroogeComma = ",".freeze
     ScroogeRegexJoin = /(?:LEFT|INNER|OUTER|CROSS)*\s*(?:STRAIGHT_JOIN|JOIN)/i
 
     attr_accessor :seen_columns
@@ -27,11 +27,11 @@ def make_callsite(model_class, original_sql)
       def use_scrooge?(model_class, original_sql)
         original_sql = original_sql.to_sql if original_sql.respond_to?(:to_sql)
 
-        original_sql =~ select_regexp(model_class.table_name) && 
-        model_class.columns_hash.has_key?(model_class.primary_key) && 
+        original_sql =~ select_regexp(model_class.table_name) &&
+        model_class.columns_hash.has_key?(model_class.primary_key) &&
         original_sql !~ ScroogeRegexJoin
       end
-      
+
       # The regexp that enables us to replace the * from SELECT * with
       # the list of columns we actually need
       #
@@ -79,20 +79,19 @@ def scrooged_sql(seen_columns, sql)
         sql.gsub(@select_regexp, "SELECT #{scrooge_select_sql(seen_columns)} FROM")
       end
     end
-    
+
     # List if columns what were not fetched
     #
     def missing_columns(fetched_columns)
       (@all_columns - SimpleSet.new(fetched_columns)) << @primary_key
     end
-    
+
     # Returns sql for fetching the unfetched columns for all the rows
     # in the result set, specified by primary_keys
     #
     def reload_sql(primary_keys, fetched_columns)
-      sql_keys = primary_keys.collect{|pk| "#{connection.quote_column_name(pk)}"}.join(ScroogeComma)
       cols = scrooge_select_sql(missing_columns(fetched_columns))
-      "SELECT #{cols} FROM #{@quoted_table_name} WHERE #{@quoted_primary_key} IN (#{sql_keys})"
+      "SELECT #{cols} FROM #{@quoted_table_name} WHERE #{@quoted_primary_key} IN (#{primary_keys.join(ScroogeComma)})"
     end
 
     def connection